. 2012 Oct 24;176(10):875–885. doi: 10.1093/aje/kws179

Table 4.

Changes in Alcohol Use and Nonuse of Condoms by Age From PT₀ to PT₂ Among Male Circumcision Acceptors and Nonacceptors, Rakai, Uganda, 2007–2011

	Male Circumcision Acceptors							Male Circumcision Nonacceptors (n = 300)							P Value Testing H^a,b₀: Δ_ac = Δ_nac
	PT₀		PT₂		Δ^a_ac	95% CI	P Value Testing H^a,b₀: Δ_ac = 0	PT₀		PT₂		Δ^a_nac	95% CI	P Value Testing H^a,b₀: Δ_nac = 0
	No.	%	No.	%	Δ^a_ac	95% CI	P Value Testing H^a,b₀: Δ_ac = 0	No.	%	No.	%	Δ^a_nac	95% CI	P Value Testing H^a,b₀: Δ_nac = 0
Alcohol use before sex in past year by age, years^c
16–20	41	33.3	39	31.7	1.6	−11.2, 7.9	0.74	9	36	9	36	0	−22.2, 22.2	1	0.9
21–25	152	48	136	42.9	−5.5	−10.7, −3.2	0.04	37	46.8	48	60.8	−7.3	−16.7, 2.2	0.13	0.75
26–30	162	62.3	143	55	−5.7	−11.5, 0.2	0.06	38	64.4	38	64.4	1.4	−9.6, 12.5	0.8	0.27
31–35	146	78.5	117	62.9	−15.6	−21.5, −9.6	<0.0001	38	80.9	34	72.3	−7.8	−18.1, 2.4	0.13	0.2
36–51	173	80.5	149	69.3	−11	−17.0, −5.0	<0.001	47	92.2	40	78.4	−14	−25.0, −2.9	0.01	0.64
No condom use at last sex with any partner by age, years^c
16–20	65	52.9	87	70.7	17.9	7.8, 28.0	<0.001	13	52	21	84	32	13.7, 50.3	<0.001	0.19
21–25	225	71	281	88.6	18.3	13.6, 22.9	<0.0001	58	73.4	66	83.5	11.3	1.3, 21.4	0.03	0.22
26–30	233	89.6	238	91.5	3.2	−1.1, 7.4	0.14	54	91.5	52	88.1	−2.6	−12.6, 7.3	0.6	0.29
31–35	173	93	174	93.6	0.8	−3.1, 4.8	0.67	42	89.4	42	89.4	0.5	−10.6, 11.7	0.93	0.96
36–51	199	92.6	197	91.6	−0.9	−4.6, 2.8	0.63	49	96.1	47	92.2	−3.9	−12.3, 4.6	0.37	0.53
No condom use at last sex with nonmarital partner^d
≤20	39	46.4	40	47.6	1.2	−12.2, 14.6	0.86	9	47.4	14	73.7	26.3	6.5, 46.1	<0.01	0.04
21–25	59	48.8	70	59.9	9.3	1.0, 17.6	0.03	8	30.8	12	46.2	16.4	−4.9, 37.7	0.13	0.54
26–30	29	43.3	36	53.7	12.5	−0.8, 25.7	0.07	6	46.2	8	61.5	11.4	−15.6, 38.4	0.41	0.96
31–35	16	57.1	16	57.1	0.3	−21.0, 21.6	0.98	4	44.4	6	66.7	23.8	0.0, 47.6	0.05	0.15
≥36	12	40	14	46.7	4.9	−14.5, 24.3	0.62	2	28.6	3	42.9	14.3	−28.8, 57.4	0.52	0.7

Abbreviations: CI, confidence interval; H₀, null hypothesis; PT₀, start of the posttrial surveillance; PT₂, the second posttrial visit; Δ_ac, change in percentage from PT₀ to PT₂ within the male circumcision acceptors; Δ_nac, change in percentage from PT₀ to PT₂ within the male circumcision nonacceptors.

^a After adjustment for loss to follow-up at PT₂ using the inverse probability weighting method. Results are similar to those without accounting for the informative loss to follow-up.

^b P value based on the Wald test using the linear models for modeling the marginal distributions of repeated outcomes.

^c Among men reporting being sexually active at both PT₀ and PT₂.

^d Among men reporting nonmarital/nonconsensual relations at both PT₀ and PT₂.