Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Sex differences in participation by intervention. One-sample binomial z-tests were conducted using the proportion of total subjects per intervention as the expected value (black bars) and proportion of women as the observed value (gray bars). Proportions are represented as percentages. **p<0.007.
