Original Article
Influence of Article Type on the Impact Factor of Dermatology Journals
Influencia de los distintos tipos de artículo en el factor de impacto de las revistas dermatológicas
L. Rodríguez-Lagoa,
, A. Molina-Leyvab, M. Pereiro-Ferreirósc, I. García-Dovald
Autor para correspondencia
a Facultad de Medicina, Universidad de Santiago de Compostela, Santiago de Compostela, Spain
b UGD Dermatología, Complejo Hospitalario de Granada, Granada, Spain
c Departamento de Dermatología, Facultad de Medicina, Universidad de Santiago de Compostela, Santiago de Compostela, Spain
d Servicio de Dermatología, Complexo Hospitalario Universitario de Vigo, Vigo, Spain
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"apellidos" => "García-Doval" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">d</span>" "identificador" => "aff0020" ] ] ] ] "afiliaciones" => array:4 [ 0 => array:3 [ "entidad" => "Facultad de Medicina, Universidad de Santiago de Compostela, Santiago de Compostela, Spain" "etiqueta" => "a" "identificador" => "aff0005" ] 1 => array:3 [ "entidad" => "UGD Dermatología, Complejo Hospitalario de Granada, Granada, Spain" "etiqueta" => "b" "identificador" => "aff0010" ] 2 => array:3 [ "entidad" => "Departamento de Dermatología, Facultad de Medicina, Universidad de Santiago de Compostela, Santiago de Compostela, Spain" "etiqueta" => "c" "identificador" => "aff0015" ] 3 => array:3 [ "entidad" => "Servicio de Dermatología, Complexo Hospitalario Universitario de Vigo, Vigo, Spain" "etiqueta" => "d" "identificador" => "aff0020" ] ] "correspondencia" => array:1 [ 0 => array:3 [ "identificador" => "cor0005" "etiqueta" => "⁎" "correspondencia" => "Corresponding author." ] ] ] ] "titulosAlternativos" => array:1 [ "es" => array:1 [ "titulo" => "Influencia de los distintos tipos de artículo en el factor de impacto de las revistas dermatológicas" ] ] "resumenGrafico" => array:2 [ "original" => 0 "multimedia" => array:7 [ "identificador" => "fig0005" "etiqueta" => "Figure 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 2239 "Ancho" => 3166 "Tamanyo" => 320119 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Distribution of citations according to article type for each journal. Actas refers to <span class="elsevierStyleItalic">Actas Dermo-sifiliográficas</span>; BJD, <span class="elsevierStyleItalic">British Journal of Dermatology</span>; Contact, <span class="elsevierStyleItalic">Contact Dermatitis</span>; JAAD, <span class="elsevierStyleItalic">Journal of the American Academy of Dermatology</span>; and JAMA Dermatol, <span class="elsevierStyleItalic">JAMA Dermatology</span>.</p>" ] ] ] "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">Introduction</span><p id="par0005" class="elsevierStylePara elsevierViewall">The impact factor (IF) has come to carry increasing weight in journal evaluation and management, and editorial boards logically discuss strategies to improve theirs. One such a strategy is selecting article types that will attract the largest number of citations. As some journals have decided to prioritize certain article types, they have reduced the number of pages allotted to others, such as case reports.<a class="elsevierStyleCrossRef" href="#bib0100"><span class="elsevierStyleSup">1</span></a></p><p id="par0010" class="elsevierStylePara elsevierViewall">Initially conceived as an indicator for comparing the influence, or impact, of scientific journals,<a class="elsevierStyleCrossRef" href="#bib0105"><span class="elsevierStyleSup">2</span></a> the IF is now seen as a reflection of a journal's quality and prestige, even though that use may be inappropriate.<a class="elsevierStyleCrossRef" href="#bib0110"><span class="elsevierStyleSup">3</span></a> The Web of Knowledge of the Institute for Scientific Information (ISI) publishes an annual list of IFs for all journals indexed in their database, the Web of Science. The lists are known as the Journal Citation Reports. To be selected for indexing in the ISI's Web of Science, a journal must meet certain criteria, such as the regular publication of issues, the ease with which cited sources can be recovered, the language of publication (full text in English, sources in English), and content (a range of articles of scientific interest that includes emerging topics).<a class="elsevierStyleCrossRef" href="#bib0115"><span class="elsevierStyleSup">4</span></a></p><p id="par0015" class="elsevierStylePara elsevierViewall">A journal's IF is calculated for a calendar year (2015, for example) and is expressed as the quotient of a fraction in which the numerator is the number of citations the journal received that year by articles indexed in a specific database (such as the ISI's) and the denominator is the number of articles published by the journal in the 2 preceding years (ie, those published in 2014 and 2013 for a 2015 IF). Thus, the quotient reflects the average overall citation rate for a journal's articles in a given year.<a class="elsevierStyleCrossRef" href="#bib0120"><span class="elsevierStyleSup">5</span></a></p><p id="par0020" class="elsevierStylePara elsevierViewall">The numerator includes all references made to any article published in a journal, making the IF a direct reflection of the number of citations attracted. The more articles the journal publishes, the more articles can be cited, favoring a higher IF. Journals on more specialized clinical topics like dermatology will, a priori, have lower IFs than general medical journals such as the <span class="elsevierStyleItalic">New England Journal of Medicine.</span><a class="elsevierStyleCrossRef" href="#bib0125"><span class="elsevierStyleSup">6</span></a> To illustrate the effect of specialization, it is sufficient to note that the highest IF in dermatology in 2015 (6.915) was earned by the <span class="elsevierStyleItalic">Journal of Investigative Dermatology</span>. In contrast, the <span class="elsevierStyleItalic">New England Journal of Medicine</span>'s IF for the same year was 59.558.<a class="elsevierStyleCrossRef" href="#bib0130"><span class="elsevierStyleSup">7</span></a></p><p id="par0025" class="elsevierStylePara elsevierViewall">The denominator includes only the articles an index such as the ISI's classifies as citable. Given a high IF's influence on visibility and even on a journal's income, many editorial boards that prioritize this metric will apply various strategies to achieve it. If, for example, a report is published as a letter to the editor, the ISI will include a reference to it in the numerator, but the letter will be omitted from the denominator because it is not classified as a citable publication. Journals therefore publish information in letters to lower the number of citable articles and thereby raise the quotient. Other ways to raise an IF include publishing reviews, original articles from well-known research groups, and studies of common diseases; journals may even decide to reject certain articles they believe will attract few citations.<a class="elsevierStyleCrossRef" href="#bib0135"><span class="elsevierStyleSup">8</span></a> For this reason many researchers have explored how article type influences citation rates. For example, a study comparing citations received by ear-nose-throat journals in the UK showed that review articles received 2-fold more citations than case reports on average.<a class="elsevierStyleCrossRef" href="#bib0140"><span class="elsevierStyleSup">9</span></a></p><p id="par0030" class="elsevierStylePara elsevierViewall">Some dermatology journals have increased their IFs surprisingly in recent years. <span class="elsevierStyleItalic">Contact Dermatitis</span>'s rose from only 2.701 in 2005 to 5.514 in 2015, for example, possibly because they began publishing more articles of general interest in areas like molecular biology, vascular biology, immunology, infections, or conjunctive tissue conditions, among other topics. Such articles are believed to attract more citations. Some journals have also eliminated abstracts from short case reports.<a class="elsevierStyleCrossRef" href="#bib0145"><span class="elsevierStyleSup">10</span></a></p><p id="par0035" class="elsevierStylePara elsevierViewall">A limitation of the ISI IF, which is published only by Thomson Reuters, is that it is difficult for outsiders to replicate, obliging other bibliometric services to develop their own metrics. The exact criteria Thomson Reuters applies to identify citable articles for specific journals remain unclear, explaining the difficulty or impossibility of replication. This problem has been discussed in the literature.<a class="elsevierStyleCrossRefs" href="#bib0150"><span class="elsevierStyleSup">11,12</span></a></p><p id="par0040" class="elsevierStylePara elsevierViewall">Our aim was to describe the influence of different article types (case reports, original articles, reviews, and “other” types) on the IFs of dermatology journals.</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">Material and Methods</span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Article Selection</span><p id="par0045" class="elsevierStylePara elsevierViewall">We retrieved data for articles published in 2013 and 2014 by some of the most important journals in dermatology: <span class="elsevierStyleItalic">JAMA Dermatology</span> (JAMA Dermatol), <span class="elsevierStyleItalic">Journal of the American Academy of Dermatology</span> (JAAD)<span class="elsevierStyleItalic">, Contact Dermatitis</span>, and the <span class="elsevierStyleItalic">British Journal of Dermatology</span> (BJD). We also included <span class="elsevierStyleItalic">Actas Dermo-Sifiliográficas</span> (Actas Dermosifiliogr) because it is the journal of reference for the specialty in Spain, although an IF is not currently calculated for it by Thomson Reuters.</p><p id="par0050" class="elsevierStylePara elsevierViewall">We also retrieved all citations of articles published in 2013 and 2014 that appeared in articles published in 2015, using the Scopus database, which includes Actas Dermosifiliogr.</p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Classification of Articles by Type</span><p id="par0055" class="elsevierStylePara elsevierViewall">Articles without an abstract, letters to the editor, and all special-issue publications for conferences were excluded. All remaining articles were considered citable and classified into the following categories: case reports (or case series), original articles (including systematic reviews), narrative reviews, and “other” types.</p><p id="par0060" class="elsevierStylePara elsevierViewall">These citable articles provided the denominator for calculating each journal's IF. With the intention of reproducing the ISI-calculated IF as faithfully as possible, the difficulty of precisely identifying citable articles led us to discard any uncited ones whose citability was in question, until we reached the number of citable articles used by ISI. We were aware that this decision might well yield an IF higher than the one published by Thomson Reuters. Citations received by eliminated articles were not included in the calculations.</p><p id="par0065" class="elsevierStylePara elsevierViewall">We compiled descriptive statistics for included articles and calculated an overall journal IF for 2015 as well as the mean IFs for each article type. The results were then compared to those published by Thomson Reuters.</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Ethical Considerations</span><p id="par0070" class="elsevierStylePara elsevierViewall">It was not considered necessary to seek ethics committee approval because ours was a bibliometric study.</p></span></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Results</span><p id="par0075" class="elsevierStylePara elsevierViewall">We found a total of 6934 articles published in 2013 and 2014 by the 5 journals. After the classification process, 5099 were excluded, leaving 1835.</p><p id="par0080" class="elsevierStylePara elsevierViewall">Over half the articles retrieved for many of the journals were excluded. For example, we set aside 1830 of the 2528 BJD publications retrieved and 526 of the 785 JAMA Dermatol publications. Of the 378 published by Actas Dermosifiliogr, we set aside 170.</p><p id="par0085" class="elsevierStylePara elsevierViewall">The publication of many proceedings issues corresponding to international conferences accounted for the large number of exclusions. In 2013 alone, the 93rd Annual Meeting of the British Association of Dermatologists and the 27th Annual Meeting of the British Society for Paediatric Dermatology, among other conferences, led to the publication of 1239 titles.</p><p id="par0090" class="elsevierStylePara elsevierViewall">Furthermore, many articles were published without abstracts. Most of them were in sections where case reports appeared, including the section for letters to the editor.</p><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Citations and Impact Factor Calculation</span><p id="par0095" class="elsevierStylePara elsevierViewall"><a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a> shows the discrepancy between the number of citations according to ISI reporting and the number found by our search in Scopus.</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><p id="par0100" class="elsevierStylePara elsevierViewall">Citations were not normally distributed. <a class="elsevierStyleCrossRef" href="#fig0005">Figure 1</a> shows those received by each type of article in each journal expressed as percentages of the total: a high degree of bias can be seen given that most articles were not cited at all.</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0105" class="elsevierStylePara elsevierViewall">The highest IF was earned by JAMA Dermatol (4.16), followed by <span class="elsevierStyleItalic">Contact Dermatitis</span> (4.13), JAAD (4.07), and BJD (3.52) (<a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a>). The IF of Actas Dermosifiliogr (1.06) was substantially lower.</p><elsevierMultimedia ident="tbl0010"></elsevierMultimedia></span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0100">Distribution of Article Types</span><p id="par0110" class="elsevierStylePara elsevierViewall">The journals differed with respect to how much of their space was devoted to each type of article. Most of the journals published original articles in higher proportions: BJD, 76.8%; <span class="elsevierStyleItalic">Contact Dermatitis</span>, 81.1%; JAAD, 63.4%; and JAMA Dermatol, 63.7%. The exception was Actas Dermosifiliogr, in which original articles accounted for only 31.7% of the publications.</p><p id="par0115" class="elsevierStylePara elsevierViewall"><a class="elsevierStyleCrossRef" href="#tbl0015">Table 3</a> shows IFs by article type for each journal. Bold-face type distinguishes the lowest IFs. Case reports and “other” types of articles received lower IFs than the journal overall. This effect can be seen most clearly in the figures for the BJD, whose overall IF was 3.52, but whose case reports had an IF of only 1.51.</p><elsevierMultimedia ident="tbl0015"></elsevierMultimedia></span></span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0105">Discussion</span><p id="par0120" class="elsevierStylePara elsevierViewall">We found that different types of articles exercise different degrees of influence on a journal's IF. Narrative reviews and original articles tend to raise an IF whereas case reports lower it. This effect was seen in all the journals we analyzed (<a class="elsevierStyleCrossRef" href="#tbl0015">Table 3</a>). Moreover, while the degree of influence of each article type on overall IFs tended to be similar across the journals, there were small differences in the ratios between article-type IFs and a journal's overall IF. For example, the effect of case reports on lowering the IF was more attenuated in <span class="elsevierStyleItalic">Contact Dermatitis</span> and JAMA Dermatol than in the other journals. Moreover, the original articles published by JAMA Dermatol had the strongest positive influence on its IF, while narrative reviews made the strongest contribution to the IFs of BJD and Actas Dermosifiliogr. The effect of the narrative reviews could not be analyzed for JAMA Dermatol because that journal published only 2 of them in 2013 and 2014. Likewise, the effect on IF of articles in the category “other” could not be discerned because this category contained such diverse types.</p><p id="par0125" class="elsevierStylePara elsevierViewall">One limitation of our study was the difficulty of replicating the IF calculations published by the ISI, an issue that has been discussed elsewhere<a class="elsevierStyleCrossRef" href="#bib0155"><span class="elsevierStyleSup">12</span></a> and remains an important problem today, considering the emphasis now placed on this metric. Even the slight differences in IF that emerge when small changes are made in the method of calculation affects a journal's rank. <a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a> shows that the ISI-calculated IFs differ considerably from the ones we calculated based on Scopus. In fact, although Scopus generates its own indicator of influence, the SCImago Journal Rank (SJR), it is also difficult to replicate because it uses citations accumulated over 3 years and is weighted. The 2015 SJRs published for the 5 journals we studied were as follows: Actas Dermosifiliogr, 0.623; BJD, 2.021; <span class="elsevierStyleItalic">Contact Dermatitis</span>, 1.010; JAAD, 2.242; JAMA Dermatol, 1.485.<a class="elsevierStyleCrossRef" href="#bib0160"><span class="elsevierStyleSup">13</span></a> The Scopus-based IFs we calculated were lower than the ISI-published figures for 2015. The resulting differences in rank (<a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a>), show that JAMA Dermatol is the leading journal according to our calculations, whereas the ISI IF puts that journal in third place, behind both <span class="elsevierStyleItalic">Contact Dermatitis</span> and JAAD. Actas Dermosifiliogr, with a smaller readership, has a lower IF than the others, although it has tended to rise in recent years, from 0.05 in 2007<a class="elsevierStyleCrossRef" href="#bib0165"><span class="elsevierStyleSup">14</span></a> to 1.06 in 2015.</p><p id="par0130" class="elsevierStylePara elsevierViewall">The lack of methodological certainty when assessing a journal's influence is related to variation in citations retrievable from different indexes. The citations we retrieved from the Scopus database did not coincide with those indexed by ISI. It is also difficult to know exactly which citable articles the ISI includes in their denominators. We made an effort to obtain figures that would be similar to those in the ISI denominators, but the number of citations we found for the numerator was lower.</p><p id="par0135" class="elsevierStylePara elsevierViewall">One noteworthy observation was the large number of articles excluded from IF calculations. Some exclusions were the result of the publication of conference-abstract issues, but we also had to exclude many articles published without abstracts. It is possible that journals omit abstracts intentionally to influence the IF by publishing reports as “notes” or in other sections that are not incorporated into the denominator.</p><p id="par0140" class="elsevierStylePara elsevierViewall">The IF reflects the average citation rate across the journal as a whole, whereas actual citations are not normally distributed and all articles logically do not contribute equally to the IF. The most cited articles normally account for only a small percentage of a journal's publications, and some studies have shown that 50% of citations come from 15% of the articles.<a class="elsevierStyleCrossRef" href="#bib0110"><span class="elsevierStyleSup">3</span></a> Including only a few highly cited articles in the calculation increases the IF considerably, since it is an average and therefore highly susceptible to the influence of values at the extremes. It would be more reasonable, therefore, to assess median impact. Furthermore, all citations of an article carry the same weight in IF calculations,<a class="elsevierStyleCrossRef" href="#bib0170"><span class="elsevierStyleSup">15</span></a> as no distinction is made between those citing new research and those citing other article types of less importance. Likewise, references to articles being criticized (ones that the scientific community has rejected as valuable) also count toward improving an IF.</p><p id="par0145" class="elsevierStylePara elsevierViewall">Another limitation of our study is that we calculated the IFs for only a single year. Journals change, adopting new strategies to improve their metrics, and the results of studies like ours may therefore vary over time.</p><p id="par0150" class="elsevierStylePara elsevierViewall">Our findings show that top-ranked journals publish fewer case reports. Nabil and Samman,<a class="elsevierStyleCrossRef" href="#bib0175"><span class="elsevierStyleSup">16</span></a> who also studied whether high-IF journals really publish fewer case reports, analyzed hypothetical IF calculations in which they discounted both citations received from case reports and the number of case reports published. They concluded that the IFs of journals that published more case reports were indeed negatively affected by that editorial decision.</p></span><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0110">Conclusions</span><p id="par0155" class="elsevierStylePara elsevierViewall">Our study confirms how difficult it is to replicate IF calculations, revealing a weakness of an indicator that carries so much weight in publishing today. IFs can be manipulated to a certain degree by publishing more articles without abstracts, as such articles still attract citations even though they are excluded from the denominator.</p><p id="par0160" class="elsevierStylePara elsevierViewall">Case reports and “other” articles lowered journal IFs, and original articles and narrative reviews raised them in this study. Case reports, which attract readers among clinicians, who are often interested in their educational value, may be considered less important by researchers and therefore not be cited. For these reasons, editorial strategies that focus on raising an IF can lead to loss of content of the type clinicians want to read.<a class="elsevierStyleCrossRef" href="#bib0180"><span class="elsevierStyleSup">17</span></a> Although case reports do not always serve to drive change in clinical practice, some of them provide important information that serves as a starting point for a hypothesis and further research.<a class="elsevierStyleCrossRef" href="#bib0185"><span class="elsevierStyleSup">18</span></a></p><p id="par0165" class="elsevierStylePara elsevierViewall">Dermatology provides good examples of this tie between cases and research. We have seen long-lived diagnostic entities emerge from descriptions of case series. Examples are toxic epidermal necrolysis and erythropoietic protoporphyria. Similarly, reports from series of cases of dermatitis herpetiformis included the observation of villous atrophy, leading to the unforeseen establishment of a relation to gluten intolerance. Single case reports have also furthered the advance of therapies in dermatology by suggesting new uses for treatments and by documenting unforeseen adverse effects.<a class="elsevierStyleCrossRef" href="#bib0190"><span class="elsevierStyleSup">19</span></a></p><p id="par0170" class="elsevierStylePara elsevierViewall">We share the opinion of Ruano et al<a class="elsevierStyleCrossRef" href="#bib0135"><span class="elsevierStyleSup">8</span></a> that editorial boards should strike a balance between the need to increase IF and the need to maintain the attention of clinician readers.</p></span><span id="sec0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0115">Conflicts of Interest</span><p id="par0175" class="elsevierStylePara elsevierViewall">The authors declare that they have no conflicts of interest.</p></span></span>" "textoCompletoSecciones" => array:1 [ "secciones" => array:12 [ 0 => array:3 [ "identificador" => "xres1036637" "titulo" => "Abstract" "secciones" => array:4 [ 0 => array:2 [ "identificador" => "abst0005" "titulo" => "Background and objective" ] 1 => array:2 [ "identificador" => "abst0010" "titulo" => "Material and methods" ] 2 => array:2 [ "identificador" => "abst0015" "titulo" => "Results" ] 3 => array:2 [ "identificador" => "abst0020" "titulo" => "Conclusions" ] ] ] 1 => array:2 [ "identificador" => "xpalclavsec990663" "titulo" => "Keywords" ] 2 => array:3 [ "identificador" => "xres1036636" "titulo" => "Resumen" "secciones" => array:4 [ 0 => array:2 [ "identificador" => "abst0025" "titulo" => "Introducción y objetivos" ] 1 => array:2 [ "identificador" => "abst0030" "titulo" => "Material y métodos" ] 2 => array:2 [ "identificador" => "abst0035" "titulo" => "Resultados" ] 3 => array:2 [ "identificador" => "abst0040" "titulo" => "Conclusiones" ] ] ] 3 => array:2 [ "identificador" => "xpalclavsec990662" "titulo" => "Palabras clave" ] 4 => array:2 [ "identificador" => "sec0005" "titulo" => "Introduction" ] 5 => array:3 [ "identificador" => "sec0010" "titulo" => "Material and Methods" "secciones" => array:3 [ 0 => array:2 [ "identificador" => "sec0015" "titulo" => "Article Selection" ] 1 => array:2 [ "identificador" => "sec0020" "titulo" => "Classification of Articles by Type" ] 2 => array:2 [ "identificador" => "sec0025" "titulo" => "Ethical Considerations" ] ] ] 6 => array:3 [ "identificador" => "sec0030" "titulo" => "Results" "secciones" => array:2 [ 0 => array:2 [ "identificador" => "sec0035" "titulo" => "Citations and Impact Factor Calculation" ] 1 => array:2 [ "identificador" => "sec0040" "titulo" => "Distribution of Article Types" ] ] ] 7 => array:2 [ "identificador" => "sec0045" "titulo" => "Discussion" ] 8 => array:2 [ "identificador" => "sec0050" "titulo" => "Conclusions" ] 9 => array:2 [ "identificador" => "sec0055" "titulo" => "Conflicts of Interest" ] 10 => array:2 [ "identificador" => "xack349278" "titulo" => "Acknowledgments" ] 11 => array:1 [ "titulo" => "References" ] ] ] "pdfFichero" => "main.pdf" "tienePdf" => true "fechaRecibido" => "2017-06-02" "fechaAceptado" => "2018-01-17" "PalabrasClave" => array:2 [ "en" => array:1 [ 0 => array:4 [ "clase" => "keyword" "titulo" => "Keywords" "identificador" => "xpalclavsec990663" "palabras" => array:4 [ 0 => "Impact factor" 1 => "Case reports" 2 => "Bibliometrics" 3 => "Dermatology" ] ] ] "es" => array:1 [ 0 => array:4 [ "clase" => "keyword" "titulo" => "Palabras clave" "identificador" => "xpalclavsec990662" "palabras" => array:4 [ 0 => "Factor de impacto" 1 => "Casos clínicos" 2 => "Bibliometría" 3 => "Dermatología" ] ] ] ] "tieneResumen" => true "resumen" => array:2 [ "en" => array:3 [ "titulo" => "Abstract" "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Background and objective</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">For scientific journals, achieving a high impact factor (IF) has become a goal in its own right. Our aim was to describe the influence of article type on the IF of dermatology journals.</p></span> <span id="abst0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Material and methods</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">We used the Scopus database to calculate an IF for <span class="elsevierStyleItalic">Actas Dermo-Sifiliográficas</span> and the major dermatology journals, excluding articles without abstracts, letters to the editor, and conference proceedings. Included articles were classified into 4 categories: case reports, original articles, narrative reviews, and other. We also calculated the mean IF for each article type. We then compared our results with IFs published by the Institute for Scientific Information.</p></span> <span id="abst0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">Results</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">The proportion of each type of article differed between journals. Original articles carried the greatest weight in the major journals (BJD, 76.8%; Contact, 81.1%; JAAD, 63.4%; JAMA Dermatol, 63.7%.) but not in <span class="elsevierStyleItalic">Actas Dermo-Sifiliográficas</span>, where only 31.7% were original research articles. A higher IF was associated with the publication of reviews and original articles; a lower IF was associated with the publication of case reports and other article types.</p></span> <span id="abst0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Conclusions</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">Publishing case reports, which have lower citation rates, leads to a lower IF. Publishing reviews and original articles will lead to a higher IF. Journals that seek a higher IF should probably publish more reviews and original articles and fewer case reports. Editorial boards should seek a balance between the interests of their clinician readers and the journal's need for a higher IF.</p></span>" "secciones" => array:4 [ 0 => array:2 [ "identificador" => "abst0005" "titulo" => "Background and objective" ] 1 => array:2 [ "identificador" => "abst0010" "titulo" => "Material and methods" ] 2 => array:2 [ "identificador" => "abst0015" "titulo" => "Results" ] 3 => array:2 [ "identificador" => "abst0020" "titulo" => "Conclusions" ] ] ] "es" => array:3 [ "titulo" => "Resumen" "resumen" => "<span id="abst0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Introducción y objetivos</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">Para las revistas científicas el factor de impacto (FI) se ha convertido en un objetivo en sí mismo. El objetivo de nuestro estudio es describir la influencia de los distintos tipos de artículo en el FI de las revistas dermatológicas.</p></span> <span id="abst0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">Material y métodos</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">Empleando la base de datos Scopus hemos reproducido los cálculos del FI de 2015 de Actas Dermo-Sifiliográficas y las principales revistas dermatológicas. Hemos eliminado artículos sin resumen, cartas al editor y actas de congresos. Los artículos incluidos se clasificaron en casos clínicos, artículos originales, revisiones narrativas y «otros». Calculamos el FI medio para cada tipo de artículo. Los datos obtenidos son comparados con los proporcionados por el Institute for Scientific Information.</p></span> <span id="abst0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Resultados</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Las revistas tienen distribuciones diferentes en cuanto a tipos de artículos predominantes. Los originales son los artículos que más se publican en las revistas analizadas (BJD: 76,8%, Contact: 81,1%, JAAD: 63,4%, JAMA Dermatol: 63,7%), a excepción de Actas, en la que corresponden el 31,7% de los artículos publicados. Los tipos de artículo que se asocian con un FI medio menor al global son los casos clínicos y otros, mientras que revisiones y originales tienen un mayor FI.</p></span> <span id="abst0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Conclusiones</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">Los casos clínicos, al ser menos citados, disminuyen el FI medio de la revista. Revisiones y originales aumentan el FI. Las revistas centradas en mejorar el FI podrían publicar menos casos y más revisiones y originales. Los comités editoriales deben mantener un equilibrio entre la necesidad de aumentar su FI y el interés de los lectores clínicos.</p></span>" "secciones" => array:4 [ 0 => array:2 [ "identificador" => "abst0025" "titulo" => "Introducción y objetivos" ] 1 => array:2 [ "identificador" => "abst0030" "titulo" => "Material y métodos" ] 2 => array:2 [ "identificador" => "abst0035" "titulo" => "Resultados" ] 3 => array:2 [ "identificador" => "abst0040" "titulo" => "Conclusiones" ] ] ] ] "NotaPie" => array:1 [ 0 => array:2 [ "etiqueta" => "☆" "nota" => "<p class="elsevierStyleNotepara" id="npar0010">Please cite this article as: Rodríguez-Lago L, Molina-Leyva A, Pereiro-Ferreirós M, García-Doval I. Influencia de los distintos tipos de artículo en el factor de impacto de las revistas dermatológicas. Actas Dermosifiliogr. 2018;109:432–438.</p>" ] ] "multimedia" => array:4 [ 0 => array:7 [ "identificador" => "fig0005" "etiqueta" => "Figure 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 2239 "Ancho" => 3166 "Tamanyo" => 320119 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Distribution of citations according to article type for each journal. Actas refers to <span class="elsevierStyleItalic">Actas Dermo-sifiliográficas</span>; BJD, <span class="elsevierStyleItalic">British Journal of Dermatology</span>; Contact, <span class="elsevierStyleItalic">Contact Dermatitis</span>; JAAD, <span class="elsevierStyleItalic">Journal of the American Academy of Dermatology</span>; and JAMA Dermatol, <span class="elsevierStyleItalic">JAMA Dermatology</span>.</p>" ] ] 1 => array:8 [ "identificador" => "tbl0005" "etiqueta" => "Table 1" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => true "mostrarDisplay" => false "detalles" => array:1 [ 0 => array:3 [ "identificador" => "at1" "detalle" => "Table " "rol" => "short" ] ] "tabla" => array:2 [ "leyenda" => "<p id="spar0055" class="elsevierStyleSimplePara elsevierViewall">ABBREVIATIONS: Actas Dermosifiliogr, <span class="elsevierStyleItalic">Actas Dermo-Sifiliográficas</span>; BJD, <span class="elsevierStyleItalic">British Journal of Dermatology</span>; IF, impact factor; ISI, Institute for Scientific Information; JAAD, <span class="elsevierStyleItalic">Journal of the American Academy of Dermatology</span>; JAMA Dermatol, <span class="elsevierStyleItalic">JAMA Dermatology</span>.</p>" "tablatextoimagen" => array:1 [ 0 => array:2 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Journal \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Articles Published in 2013 \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">2015 Citations of 2013 Articles \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Articles Published in 2014 \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">2015 Citations of 2014 Articles \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Total No. of Excluded Articles \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Total No. of Included Articles \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Total No. of Citations, Scopus) \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Total No. of Citations, ISI \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Calculated IF, Scopus Data \t\t\t\t\t\t\n \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Actas Dermosifiliogr \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">81 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">124 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">127 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">96 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">170 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">208 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">220 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="" valign="top"> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">1.06 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">BJD \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">341 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">1611 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">357 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">848 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">1830 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">698 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">2459 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">3013 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">3.52 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">Contact Dermatitis</span> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">79 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">313 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">77 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">331 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">166 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">156 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">644 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">888 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">4.13 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">JAAD \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">262 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">1008 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">251 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">1080 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">2407 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">514 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">2088 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">2889 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">4.07 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">JAMA Dermatol \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">129 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">645 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">130 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">433 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">526 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">259 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">1078 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">1320 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">4.16 \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] "imagenFichero" => array:1 [ 0 => "xTab1761146.png" ] ] ] ] "descripcion" => array:1 [ "en" => "<p id="spar0050" class="elsevierStyleSimplePara elsevierViewall">Excluded and Included Articles and Citation Data.</p>" ] ] 2 => array:8 [ "identificador" => "tbl0010" "etiqueta" => "Table 2" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => true "mostrarDisplay" => false "detalles" => array:1 [ 0 => array:3 [ "identificador" => "at2" "detalle" => "Table " "rol" => "short" ] ] "tabla" => array:2 [ "leyenda" => "<p id="spar0065" class="elsevierStyleSimplePara elsevierViewall">ABBREVIATIONS: Actas Dermosifiliogr, <span class="elsevierStyleItalic">Actas Dermo-Sifiliográficas</span>; BJD, <span class="elsevierStyleItalic">British Journal of Dermatology</span>; IF, impact factor; ISI, Institute for Scientific Information; JAAD, <span class="elsevierStyleItalic">Journal of the American Academy of Dermatology</span>; JAMA Dermatol, <span class="elsevierStyleItalic">JAMA Dermatology</span>.</p>" "tablatextoimagen" => array:1 [ 0 => array:2 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head " align="" valign="top" scope="col" style="border-bottom: 2px solid black"> \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Journals, Ranked by the ISI IF \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">ISI-Published IF \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Journals, Ranked by the Scopus-Based IF \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Our Scopus-Based IF \t\t\t\t\t\t\n \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">1 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top"><span class="elsevierStyleItalic">Contact Dermatitis</span> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">5.69 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">JAMA Dermatol \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">4.16 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">2 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">JAAD \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">5.62 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top"><span class="elsevierStyleItalic">Contact Dermatitis</span> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">4.13 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">3 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">JAMA Dermatol \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">5.09 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">JAAD \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">4.07 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">4 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">BJD \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">4.32 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">BJD \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">3.52 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">5 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">– \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="" valign="top"> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">Actas Dermosifiliogr \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="left" valign="top">1.06 \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] "imagenFichero" => array:1 [ 0 => "xTab1761145.png" ] ] ] ] "descripcion" => array:1 [ "en" => "<p id="spar0060" class="elsevierStyleSimplePara elsevierViewall">Differences in Journal Rankings Between ISI-Published IF and Our Scopus-Based IF.</p>" ] ] 3 => array:8 [ "identificador" => "tbl0015" "etiqueta" => "Table 3" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => true "mostrarDisplay" => false "detalles" => array:1 [ 0 => array:3 [ "identificador" => "at3" "detalle" => "Table " "rol" => "short" ] ] "tabla" => array:3 [ "leyenda" => "<p id="spar0075" class="elsevierStyleSimplePara elsevierViewall">ABBREVIATIONS: Actas Dermosifiliogr, <span class="elsevierStyleItalic">Actas Dermo-Sifiliográficas</span>; BJD, <span class="elsevierStyleItalic">British Journal of Dermatology</span>; IF, <span class="elsevierStyleItalic">impact factor</span>; JAAD, <span class="elsevierStyleItalic">Journal of the American Academy of Dermatology</span>; JAMA Dermatol, <span class="elsevierStyleItalic">JAMA Dermatology</span>; NA, not applicable.</p>" "tablatextoimagen" => array:1 [ 0 => array:2 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head " align="" valign="top" scope="col"> \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " colspan="4" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">Case Reports</th><th class="td" title="table-head " colspan="4" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">Original Articles</th><th class="td" title="table-head " colspan="4" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">Narrative Reviews</th><th class="td" title="table-head " colspan="4" align="center" valign="top" scope="col" style="border-bottom: 2px solid black">“Other” Types</th></tr><tr title="table-row"><th class="td" title="table-head " align="" valign="top" scope="col" style="border-bottom: 2px solid black"> \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">No. \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">% of Total Included \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Type IF \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Ratio of Type IF to Journal IF \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">No. \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">% of Total Included \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Type IF \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Ratio of Type IF to Journal IF \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">No. \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">% of Total Included \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Type IF \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Ratio of Type IF to Journal IF \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">No. \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">% of Total Included \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Type IF \t\t\t\t\t\t\n \t\t\t\t</th><th class="td" title="table-head " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Ratio of Type IF to Journal IF \t\t\t\t\t\t\n \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Actas Dermosifiliogr \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">55 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">26.4 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top"><span class="elsevierStyleBold">0.47</span> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">0.44 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">66 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">31.7 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">1.14 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">1.08 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">81 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">38.9 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">1.47 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">1.39 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">6 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">2.9% \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">NA \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">BJD \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">63 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">9.0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top"><span class="elsevierStyleBold">1.51</span> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">0.43 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">536 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">76.8 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">3.54 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">1.01 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">81 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">11.6 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">4.95 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">1.41 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">18 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">2.6% \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">3.78 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">1.07 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">Contact Dermatitis</span> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">12 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">7.8 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top"><span class="elsevierStyleBold">2.58</span> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">0.62 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">128 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">82.1 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">4.16 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">1 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">16 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">10.3 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">5.00 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">1.20 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">0 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">0% \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">NA \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">NA \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">JAAD \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">37 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">7.2 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top"><span class="elsevierStyleBold">2.14</span> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">0.53 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">325 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">63.4 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">4.34 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">1.07 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">140 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">27.3 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">4.16 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">1.02 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">11 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">2.1% \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top"><span class="elsevierStyleBold">1.45</span> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top"><span class="elsevierStyleBold">0.36</span> \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">JAMA Dermatol \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">86 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">33.2 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top"><span class="elsevierStyleBold">2.53</span> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">0.62 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">165 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">63.7 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">5.00 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">1.23 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">2 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">0.8 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">10.5 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">2.58 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">6 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top">2.3% \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top"><span class="elsevierStyleBold">2.33</span> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="table-entry " align="char" valign="top"><span class="elsevierStyleBold">0.57</span> \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] "imagenFichero" => array:1 [ 0 => "xTab1761147.png" ] ] ] "notaPie" => array:1 [ 0 => array:3 [ "identificador" => "tblfn0005" "etiqueta" => "*" "nota" => "<p class="elsevierStyleNotepara" id="npar0005">Data in bold face are the lowest IFs.</p>" ] ] ] "descripcion" => array:1 [ "en" => "<p id="spar0070" class="elsevierStyleSimplePara elsevierViewall">Calculated Scopus-Based IFs, by Article Type<a class="elsevierStyleCrossRef" href="#tblfn0005"><span class="elsevierStyleSup">*</span></a></p>" ] ] ] "bibliografia" => array:2 [ "titulo" => "References" "seccion" => array:1 [ 0 => array:2 [ "identificador" => "bibs0015" "bibliografiaReferencia" => array:19 [ 0 => array:3 [ "identificador" => "bib0100" "etiqueta" => "1" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "A species not extinct: Publication of case reports and scientific knowledge" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:1 [ 0 => "J.C. 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