Table 2.

Profiles of antenatal attendees, associated with HIV infection, rural Manyara and Singida within northern Tanzania, 2003–2004.

Characteristics	N (%)	HIV prevalence % (95%CI)	Crude OR (95%CI)	Age-adjusted OR (95%CI)	Adjusted for other OR (95%CI)
Total	1296	26 (2.0: 1.34–2.97)
Age groups
15–19 years	165 (12.7)	3.03 (1.12–7.30)	1.0	-	1.0
20–24 years	417 (32.2)	1.92 (0.89–3.40)	0.6 (0.20–1.94)		0.7 (0.20–2.47)
25–29 years	349 (26.9)	1.43 (0.53–3.51)	0.5 (0.13–1.63)		0.6 (0.14–2.30)
≥30 years	365 (28.2)	2.19 (1.02–4.44)	0.7 (0.23–2.23)		0.7 (0.20–2.78)
Residence
Remote rural	553 (42.7)	1.3 (0.56–2.71)	1.0	1.0	1.0
Rural	743 (57.3)	2.6 (1.59–4.04)	2.1 (0.85–4.90)	2.0 (0.84–4.87)	2.4 (0.95–6.18)
Marital status
Married	1183 (91.3)	1.9 (1.20–2.85)	1.0	1.0	1.0
Single/divorced/separated	113 (8.7)	3.5 (1.14–9.35)	1.9 (0.65–5.72)	1.8 (0.55–5.57)	1.3 (0.35–4.72)
Education (years)
None	349 (28.2)	3.24 (1.67–5.73)	1.0	1.0	1.0
1–6 years	174 (13.4)	1.15 (0.20–4.52)	0.4 (0.08–1.63)	0.4 (0.08–1.61)	0.3 (0.68–1.64)
7 years or more	773 (59.7)	1.71 (0.96–2.99)	0.5 (0.23–1.19)	0.5 (0.23–1.19)	0.5 (0.20–1.14)
Number of husbands/sexual partners†
1 only	1231 (95.0)	1.7 (1.11–2.69)	1.0	1.0	1.0
> 1	65 (5.0)	7.7 (2.87–17.75)	4.8(1.75–13.17)	5.4(1.91–15.43)	4.3 (1.42–12.77)
Age at first pregnancy β†
< 18 years	158 (14.0)	4.4 (1.20–4.40)	1.0	1.0	1.0
≥18 years	974 (86.0)	1.5 (0.71–2.19)	0.3 (0.13–0.72)	0.3(0.12–0.79)	0.3 (0.13–0.89)
Use of contraceptives
No	1088 (84.0)	1.6 (0.94–2.54)	1.0	1.0	1.0
Yes	208 (16.0)	4.3 (2.13–8.32)	2.8 (1.25–6.48)	2.9(1.27–6.61)	2.1 (0.79–5.71)
HIV related knowledge
No	1151(88.8)	1.91 (1.11–2.69)	1.0	1.0	1.0
Yes	145 (11.2)	2.76 (0.09–5.43)	1.5 (0.49–4.29)	0.9 (0.91–1.04)	1.8 (0.59–5.56)
History of genital sore or foul genital discharge†
No	1135 (87.6)	1.7 (1.04–2.65)	1.0	1.0	1.0
Yes	161 (12.4)	6.2 (3.19–11.44)	4.6 (2.06–10.39)	4.8(2.14–10.90)	6.8 (2.78–16.66)
Ever used condom
No	1233 (95.1)	1.9 (1.15–2.74)	1.0	1.0	1.0
Yes	63 (4.9)	6.4 (2.05–16.25)	3.7 (1.25–11.18)	3.6 (1.18–11.07)	3.2 (0.87–12.06)
Ever used VCT services
No	891 (68.8)	1.3 (0.73–2.41)	1.0	1.0	1.0
Yes	405 (31.2)	3.5 (1.98–5.87)	2.6 (1.20–5.72)	2.6 (1.2–5.72)	(0.72–4.43)

β Analysed for those aged 20 ≥ years at the time of survey,

† Variables included in the final model.

Likelihood-ratio-test (assuming reduced model nested in full model): x²(5) = 4.52, P = 0.48

Logistic model for HIV, goodness-of-fit test; x²(35) = 31.33, P = 0.64 and predictive power of the model = 78% [45]