<div xmlns="http://www.w3.org/1999/xhtml">
<p>On June 28, 2022, Journal Citation Reports 2021 was released, which is also the first time that Covid19-related publications have been included in the calculation of Journal Impact Factor (JIF). Journals in medical fields like infectious diseases, critical care, public health have significant increase in JIF. Here, by excluding the citations from and to Covid19-related papers, we identified the top 10 medical journals having the largest contribution of Covid-related papers on JIF as shown in <a ref-type="table" href="#j_jdis-2022-0020_tab_001">Table 1</a>. Prestigious medical journals are included in these identified journals. Averagely, Covid-related papers contribution rate is about 50% on the JIF of these 10 journals (with 7 journals having more than 50%). For example, Covid-related papers contribute 108.5 to the JIF of Lancet and boost it over 200 for the first time. The Covid-19 is a huge challenge to our life and scientific research, and it also raises an unprecedented challenge to our scientific research evaluation system, especially to the quantitative evaluation system, e.g., how to deal with the dominance of Covid-related papers in highly-cited papers, the new citation elites due to publications of Covid-related papers, the ranking boost of scientific journals and institutions.</p>
<table-wrap id="j_jdis-2022-0020_tab_001" position="float"><label>Table 1</label><caption><p>Top 10 journals having the largest contribution of Covid-related papers<a ref-type="table-fn" href="#j_jdis-2022-0020_table-fn_001"><sup>1</sup></a> to JIF.</p></caption>
<table frame="hsides" rules="groups">
<thead>
<tr>
<th align="center" valign="middle">Index</th>
<th align="center" valign="middle">Journal</th>
<th align="center" valign="middle">JIF2021</th>
<th align="center" valign="middle">JIF2021w/o Covid<a ref-type="table-fn" href="#j_jdis-2022-0020_table-fn_002"><sup>2</sup></a></th>
<th align="center" valign="middle">Contributionof Covid<a ref-type="table-fn" href="#j_jdis-2022-0020_table-fn_003"><sup>3</sup></a></th>
<th align="center" valign="middle">Percentage<a ref-type="table-fn" href="#j_jdis-2022-0020_table-fn_004"><sup>4</sup></a></th>
</tr>
</thead>
<tbody>
<tr>
<td align="left" valign="top">1</td>
<td align="left" valign="top">Lancet</td>
<td align="right" valign="top">202.7</td>
<td align="right" valign="top">94.2</td>
<td align="right" valign="top">108.5</td>
<td align="center" valign="top">53.5%</td>
</tr>
<tr>
<td align="left" valign="top">2</td>
<td align="left" valign="top">JAMA JAMMEDASSOC</td>
<td align="right" valign="top">157.3</td>
<td align="right" valign="top">63.8</td>
<td align="right" valign="top">93.6</td>
<td align="center" valign="top">59.5%</td>
</tr>
<tr>
<td align="left" valign="top">3</td>
<td align="left" valign="top">NEW ENGL JMED</td>
<td align="right" valign="top">176.1</td>
<td align="right" valign="top">96.2</td>
<td align="right" valign="top">79.9</td>
<td align="center" valign="top">45.4%</td>
</tr>
<tr>
<td align="left" valign="top">4</td>
<td align="left" valign="top">LANCET RESP MED</td>
<td align="right" valign="top">102.6</td>
<td align="right" valign="top">40.7</td>
<td align="right" valign="top">62.0</td>
<td align="center" valign="top">60.4%</td>
</tr>
<tr>
<td align="left" valign="top">5</td>
<td align="left" valign="top">LANCET INFECT DIS</td>
<td align="right" valign="top">71.4</td>
<td align="right" valign="top">23.8</td>
<td align="right" valign="top">47.6</td>
<td align="center" valign="top">66.7%</td>
</tr>
<tr>
<td align="left" valign="top">6</td>
<td align="left" valign="top">BMJBRIT MEDJ</td>
<td align="right" valign="top">93.3</td>
<td align="right" valign="top">47.5</td>
<td align="right" valign="top">45.9</td>
<td align="center" valign="top">49.2%</td>
</tr>
<tr>
<td align="left" valign="top">7</td>
<td align="left" valign="top">LANCET PSYCHIAT</td>
<td align="right" valign="top">77.1</td>
<td align="right" valign="top">33.1</td>
<td align="right" valign="top">44.0</td>
<td align="center" valign="top">57.1%</td>
</tr>
<tr>
<td align="left" valign="top">8</td>
<td align="left" valign="top">LANCET PUBLICHEALTH</td>
<td align="right" valign="top">72.4</td>
<td align="right" valign="top">30.6</td>
<td align="right" valign="top">41.8</td>
<td align="center" valign="top">57.7%</td>
</tr>
<tr>
<td align="left" valign="top">9</td>
<td align="left" valign="top">NAT REV IMMUNOL</td>
<td align="right" valign="top">108.6</td>
<td align="right" valign="top">68.2</td>
<td align="right" valign="top">40.4</td>
<td align="center" valign="top">37.2%</td>
</tr>
<tr>
<td align="left" valign="top">10</td>
<td align="left" valign="top">JINFECTION</td>
<td align="right" valign="top">38.6</td>
<td align="right" valign="top">8.8</td>
<td align="right" valign="top">29.8</td>
<td align="center" valign="top">77.2%</td>
</tr>
</tbody>
</table>
<table-wrap-foot>
<fn-group>
<fn id="j_jdis-2022-0020_table-fn_001"><label>1</label><p>Covid-related papers are identified as papers with ‘covid’, ‘sars-cov’, ‘coronavirus’, and ‘ncov’ in title.</p></fn>
<fn id="j_jdis-2022-0020_table-fn_002"><label>2</label><p>
<inline-formula>
<alternatives>
<inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="graphic/j_jdis-2022-0020_ieq_001.png"></inline-graphic>
<math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mtext>JIF</mtext><mn>2021</mn><mo> </mo><mo> </mo><mtext>w</mtext><mo>/</mo><mtext>o</mtext><mo> </mo><mtext>Covid=</mtext><mfrac><mrow><mi mathvariant="italic">Total</mi><mo> </mo><mi mathvariant="italic">Citations</mi><mo>−</mo><mi mathvariant="italic">Citations</mi><mo> </mo><mi mathvariant="italic">from</mi><mo>/</mo><mi mathvariant="italic">to</mi><mo> </mo><mi mathvariant="italic">covid-related</mi><mo> </mo><mi mathvariant="italic">papers</mi></mrow><mrow><mi mathvariant="italic">CitableItem</mi><mo>−</mo><mi mathvariant="italic">covid-related-CitableItem</mi></mrow></mfrac></mrow></math>
<tex-math>{\rm{JIF}}2021\,\,{\rm{w}}/{\rm{o}}\,{\rm{Covid = }}{{Total\,Citations - Citations\,from/to\,{ covid - related}\,papers} \over {CitableItem - {\mathop{ covid - related}} - CitableItem}}</tex-math>
</alternatives>
</inline-formula>
</p></fn>
<fn id="j_jdis-2022-0020_table-fn_003"><label>3</label><p>Contribution of Covid = <italic>JIF</italic>2021 − <italic>JIF</italic>2021<italic>w/o Covid</italic></p></fn>
<fn id="j_jdis-2022-0020_table-fn_004"><label>4</label><p>
<inline-formula>
<alternatives>
<inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="graphic/j_jdis-2022-0020_ieq_002.png"></inline-graphic>
<math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mtext>Percentage</mtext><mo>=</mo><mfrac><mrow><mtext>Contribution</mtext><mo> </mo><mtext>of</mtext><mo> </mo><mtext>Covid</mtext></mrow><mrow><mi mathvariant="italic">JIF</mi><mn>2021</mn></mrow></mfrac></mrow></math>
<tex-math>{\rm{Percentage}} = {{{\rm{Contribution}}\,{\rm{of}}\,{\rm{Covid}}} \over {JIF2021}}</tex-math>
</alternatives>
</inline-formula>
</p></fn>
</fn-group>
</table-wrap-foot>
</table-wrap>
</div>

Covid-related Papers Contribute 50% on the JIF of High Impact Medicine Journals

Department of Library, Information and Archives Management, School of Economics and Management

University of Chinese Academy of Sciences

Journal of Data and Information Science

This work is licensed under the Creative Commons Attribution 4.0 International License.

Covid-related Papers Contribute 50% on the JIF of High Impact Medicine Journals

Article Category: Research Note

Published Online: Oct 14, 2022

Page range: 1 - 2

Received: Sep 20, 2022

Accepted: Sep 21, 2022

DOI: https://doi.org/10.2478/jdis-2022-0020

© 2022 Jiandong Zhang et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.