Estimated mean number of sexual partners per prior 3-month period and 95% confidence intervals [CI] for each sexual behavior variable of interest among MSM in Options/San Francisco, 2009–2010.

∧Number of participants who contribute to each time point varies because this was not a strictly longitudinal cohort study. All participants started contributing data in 2009, and were at various times since diagnosis when they completed their ACASIs.∧∧PDP = potentially discordant partners (HIV-negative or unknown-status partners).*UAI = unprotected anal intercourse.**uIAI = unprotected insertive anal intercourse.***For participants with plasma viral load