Comparison of the Proportions of Female and Male Corresponding Authors in Preprint Research Repositories Before and During the COVID-19 Pandemic

The absolute difference of the percentages of male and female corresponding authors are presented as the gender gap. Percentages do not always add to 100% because the gender of some corresponding authors was unknown. The time scale for medRxiv is shorter than that of bioRxiv owing to the more recent inception of medRxiv.