Statistical analyses
Analyses used intention‐to‐treat principles and methods according to our published protocol [Analyses included all available data from all participants. We conducted difference‐in‐differences models using the full panel data, with the outcome variable regressed on a categorical variable of site, a categorical variable for time point, and an interaction term between these two variables [Analyses focused on the estimate and significance of the interaction term. Difference‐in‐differences intervention effects are expressed as crude and adjusted odds ratios (aORs) or β coefficients (aβ), along with 95% confidence intervals (CIs) [