Gender gap in cardiothoracic surgery randomized controlled trial and post-hoc analysis of randomized controlled trial...

To estimate gender disparities among first and last authorships in cardiothoracic randomized controlled trials (RCTs) and association of gender with publications in high-impact journals.

PubMed/MEDLINE database was searched from 1 January 2014 to 31 December 2020 using R statistical software via the 'easyPubMed' package to retrieve pertinent data. The 'gender' package was utilized to determine gender using the United States Social Security Administration Baby Name Data. The percentage of female first and last authors were computed along with determining the uniqueness of the names. The association of gender and publication in high-impact peer-reviewed journals was delineated. Jonckheere's trend was computed.

The database search retrieved a total of 4820 RCTs, of which gender was encoded for the first author in 3247 (67%) RCTs, among which 911 (28%) studies had women as first authors, with a similar trend across 7 years (P = 0.23). Gender was encoded for the last author of 3204 (66%) RCTs, of which 622 (19%) studies had women as last authors, with a similar trend across 7 years (P = 0.45). A total of 627 studies were published in high-impact-factor journals, among which 79 (16%) studies had female first authors and 67 (13%) studies had female last authors.

There is an obvious gender disparity of first and last authors in cardiothoracic surgery-related RCTs, with a similar trend across 7 years. However, the post-hoc analysis did demonstrate a positive trend with an increase in the number of female first authors, demonstrating progress.