Table 4. Risk Factors for HIV Acquisition.

	Univariate			Multivariate
	HR	95% Cl	p-value	HR	95% Cl	p-value
Age
<21	Ref	Ref	Ref	Ref	Ref	Ref
21-24	0.40	(0.19, 0.83)	0.01	0.41	(0.19, 0.87)	0.02
25-29	0.41	(0.20, 0.83)	0.01	0.46	(0.22, 0.98)	0.04
30-34	0.31	(0.14, 0.68)	0.004	0.40	(0.18, 0.90)	0.03
≥35	0.18	(0.09, 0.38)	<0.0001	0.30	(0.14, 0.66)	0.003
Marital status
Married, husband has one wife	Ref	Ref	Ref	Ref	Ref	Ref
Married and husband with > one wife	0.46	(0.11, 1.90)	0.28	0.46	(0.11, 2.00)	0.30
Never married/divorced/widowed	2.28	(1.21, 4.29)	0.01	1.36	(0.49, 3.76)	0.56
Living with male partner vs. alone/other	0.53	(0.31, 0.93)	0.03	1.07	(0.29, 3.94)	0.92
Education Level
None	Ref	Ref	Ref
Higher than secondary	2.04	(0.42, 9.87)	0.37
Some or completed secondary school	1.42	(0.42, 4.84)	0.57
Some or completed primary school	1.34	(0.41, 4.44)	0.63
Any monthly income of own	1.16	(0.65, 2.05)	0.62
Partner own income
No	Ref	Ref	Ref	Ref	Ref	Ref
Yes	1.21	(0.64, 2.30)	0.56	0.87	(0.45, 1.68)	0.67
Don't know/missing	2.39	(1.11, 5.13)	0.03	1.23	(0.30, 5.04)	0.77
Number of partners in last 12 months
1	Ref	Ref	Ref	Ref	Ref	Ref
>1	2.21	(1.15, 4.25)	0.02	1.47	(0.73, 2.96)	0.28
Missing	0.00	(0.00, -)	0.99	0.00	(0.00, -)	0.99
Any GUD on exam in last 3 months	1.39	(0.73, 2.67)	0.32
Any new partners in last 3 months	4.68	(1.94, 11.29)	0.0006	3.91	(1.57, 9.73)	0.003
Any HIV+ partners in last 3 months	0.89	(0.21, 3.72)	0.88
Being pregnant	1.20	(0.48, 3.00)	0.70
Total vaginal sex in last 3 months
<8	Ref	Ref	Ref
8-24	1.02	(0.57, 1.83)	0.93
24-36	0.92	(0.48, 1.78)	0.81
>36	0.65	(0.31, 1.38)	0.26
Unprotected vaginal sex in last 3 months
0	Ref	Ref	Ref	Ref	Ref	Ref
1-12	1.15	(0.59, 2.25)	0.69	1.02	(0.51, 2.04)	0.95
12-36	1.79	(0.96, 3.32)	0.07	1.78	(0.94, 3.40)	0.08
>36	1.11	(0.46, 2.65)	0.82	1.03	(0.42, 2.49)	0.96
Contraceptive
None	Ref	Ref	Ref	Ref	Ref	Ref
Oral	0.93	(0.48, 1.82)	0.83	0.91	(0.45, 1.83)	0.80
Injectable	1.01	(0.51, 1.98)	0.98	0.94	(0.46, 1.92)	0.86
IUD/other	0.41	(0.05, 3.11)	0.39	0.55	(0.07, 4.31)	0.57
Condom	0.27	(0.08, 0.94)	0.04	0.31	(0.09, 1.07)	0.06
Menopause	0.21	(0.03, 1.61)	0.13	0.38	(0.05, 3.00)	0.35
Missing	2.36	(1.05, 5.27)	0.04	2.10	(0.92, 4.79)	0.08
Trichomonas
No	Ref	Ref	Ref	Ref	Ref	Ref
Yes	1.89	(0.96, 3.71)	0.07	1.25	(0.60, 2.58)	0.55
Not done/missing	6.32	(0.83, 48.05)	0.07	13.55	(1.51,121.3)	0.02
Chlamydia
No	Ref	Ref	Ref	Ref	Ref	Ref
Yes	1.10	(0.44, 2.75)	0.83
Not done/missing	0.36	(0.05, 2.69)	0.32
Gonorrhea
No	Ref	Ref	Ref	Ref	Ref	Ref
Yes	2.43	(0.33, 17.73)	0.38
Not done/missing	0.37	(0.05, 2.72)	0.33
Bacterial vaginosis (by Nugent's criteria)
0-3	Ref	Ref	Ref	Ref	Ref	Ref
4-6	1.46	(0.72, 2.94)	0.30	1.16	(0.55, 2.41)	0.70
7-10	2.21	(1.27, 3.88)	0.005	2.03	(1.15, 3.58)	0.02
not done/missing	0.00	(0.00, -)	0.99	0.00	(0.00, -)	0.99