Table 2.

Intervention versus standard-of-care over time for the proportion of sex acts that were high risk and the number of high risk sex acts

Outcome measure	HIV negative			HIV positive			Time effect within condition Time 0 vs. Time 2	Time effect between conditions
	Time 0	Time 1	Time 2	Time 0	Time 1	Time 2
Proportion of sex acts that were high riska								At time 1: adjOR 0.86, 95 % CI (0.41–1.76), p = 0.67
								At time 2: adjOR 0.41, 95 % CI (0.20–0.84), p = 0.015
Intervention	73.74 %	49.51 %	38.28 %	83.89 %	64.53 %	53.51 %	adjOR 0.22, 95 % CI (0.13–0.37), p < 0.001
Standard-     of-care	72.41 %	51.76 %	58.40 %	82.97 %	66.56 %	72.26 %	adjOR 0.49, 95 % CI (0.30–0.79), p = 0.004
Mean number of high risk sex acts per persona,b								At time 1: adjIRR 0.89, 95 % CI (0.64–1.27), p = 0.53
								At time 2: adjIRR 0.59, 95 % CI (0.42–0.85), p = 0.004
Intervention	17.79	10.93	9.34	14.29	8.78	7.51	adjIRR 0.52, 95 % CI (0.40–0.69), p < 0.001
Standard-     of-care	15.61	10.68	13.69	12.54	8.58	11.00	adjIRR 0.87, 95 % CI (0.69–1.10), p = 0.254

Data are shown separately for HIV negative and HIV positive participants for illustrative purposes, however, HIV results did not modify the intervention effect. In this sample sex acts refer to vaginal sexual intercourse. High risk sex acts refer to unprotected sex with partners of unknown or HIV serodiscordant status. Time points separated by an average of 3.2 months

IRR incident rate ratio, OR odds ratio, adj adjusted

^aCalculated from model-based estimates accounting for all other variables in the model

^bMean number of high risk sex acts per person during the prior 3 months