Table 3.

Effect of the number of drinks consumed before sex on the proportion and number of subsequent unprotected sex acts per person per day over time

			Proportion of sex acts unprotected model			Number of unprotected sex acts model
	% of data points		OR (95% CI)	Adj estim. prop. of unprotected sex actsb		Ratio of Meansc (95% CI)	Adj estim. no. of unprotected sex acts per person per dayd
	Men n = 798	Women n = 2,237		Men	Women		Men	Women
Risky alcohol use before sexual eventa
no risk	24.8%	28.5%	1	0.81	0.79	1	1.57	1.50
low risk	7.1%	9.7%	1.39 (.93-2.08)	0.84	0.83	1.02 (.92-1.13)	1.60	1.53
moderate risk	27.3%	18.5%	1.91 (1.22-2.96)	0.87	0.87	1.10 (1.01-1.19)	1.74	1.66
high risk	29.4%	18.3%	1.78 (1.18-2.70)	0.89	0.87	1.14 (1.05-1.24)	1.82	1.74
very high risk	11.4%	25.0%	1.65 (1.14-2.41)	0.88	0.86	1.21 (1.10-1.33)	1.97	1.84

AdjOR. Adjusted odds ratios; CI, confidence interval

^aRisk level defined by WHO: no risk=0 drinks, Men: low risk=1-2 drinks (1-40g alcohol), moderate risk=3-5 drinks (41-60g alcohol), high risk=6-10 drinks (61-100g alcohol), very high risk=more than 10 drinks (>101g alcohol); Women: low risk = 1-1.7 drinks (1-20g alcohol), moderate risk=1.8-3.3 drinks (21-40g alcohol), high risk=3.4-5 drinks (41-60g alcohol), very high risk=more than 5 drinks (>61g alcohol).²⁰

^bProportion of sex acts that were unprotected per day over time calculated from model estimates controlling for gender, education, partner type, and partner HIV-serostatus.

^cAdjusted ratio of means comparing estimated mean number of unprotected sex acts by levels of the factor compared to overall mean number of unprotected sex acts.

^dNumber of unprotected per day over time calculated from model estimates controlling for gender, education, partner type, and partner HIV-serostatus.