Summary of the results of multivariable logistic regression examining the association of study characteristics with the odds that the principal author is a man
| Parameter | OR | 95% CI | P value |
| COVID-19-related article | 0.99 | 0.81 to 1.21 | 0.89 |
| Man as senior author | 1.49 | 1.21 to 1.83 | <0.001 |
| Original research or systematic review* | 1.27 | 1.05 to 1.54 | 0.02 |
| Corresponding author located in the USA† | 0.80 | 0.65 to 1.00 | 0.046 |
| Corresponding author located in Europe† | 1.02 | 0.76 to 1.38 | 0.88 |
*Relative to articles not reporting primary research.
†Relative to institutions not based in the USA or Europe.