Table 1.

Factors associated with HIV infection in 383 injection drug users in Xinjiang, China

Factors	No. of participants	No. of HIV positives (%)	Unadjusted odds ratio (95% CI)*	P-value	Adjusted odds ratio (95% CI)*	P-value
Age*(years)
<30	184	61 (33.2)	1.0	0.13	1.0†	<0.01
≥30	199	81 (40.7)	1.4 (0.9–2.1)		2.4 (1.3–4.3)
Sex
Male	339	122 (36.0)	1.0	0.22	1.0†	<0.01
Female	44	20 (45.5)	1.5 (0.8–2.8)		3.7 (1.6–8.3)
Ethnicity
Han	103	13 (12.6)	1.0	<0.01	1.0†	<0.01
Uigur	280	129 (46.1)	5.9 (3.2–11.1)		9.2 (4.2–19.7)
Place of residence
Han community	80	11 (13.8)	1.0	<0.01	1.0‡	<0.01
Uigur or mixed community	303	131 (43.2)	4.8 (2.4–9.4)		4.2 (1.8–9.5)
Married
No	299	93 (31.1)	1.0	<0.01	1.0‡	<0.01
Yes	84	49 (58.3)	3.1 (1.9–5.1)		2.6 (1.4–4.8)
Duration of drug injection
<5 years	189	44 (23.3)	1.0	<0.01	1.0 §	<0.01
≥5 years	194	98 (50.5)	3.4 (2.2–5.2)		3.7 (2.1–6.4)
Number of lifetime partners sharing injection equipments
<2	190	44 (23.2)	1.0	<0.01	1.0 §	<0.01
≥2	193	98 (50.8)	3.4 (2.2–5.3)		2.3 (1.4–3.9)

^*CI, confidence interval.

^†Model 1: age, sex, and ethnicity.

^‡Model 2: model 1 plus place of residence and marital status.

^§Model 3: model 2 plus duration of drug injection and number of lifetime partners sharing injection equipments.