Intervention impact and covariates examined in the exploratory analysis for sources of variability in model outcomes.

*Covariate varied within studies (as well as between studies).
**Number of scenarios (Ns) from the 20 studies (N), include scenarios which measured the relative change in HIV prevalence (Ns = 7), and the number of infections averted in low-prevalence epidemics (Ns = 12). STI (sexually transmitted infection). FSW (female sex worker). Non-commercial HRG refers to individuals who engage in multiple (non-commercial) partnerships.
***Efficacy in reducing HIV susceptibility per sex act (or transmission probability if intervention effect on HIV susceptibility was not differentiated from intervention effect on HIV infectivity).