HIV prevalence and factors associated with HIV infection among male injection drug users under 30: a cross-sectional study in Long An, Vietnam

Table 3 Results of multivariate logistic regression analyses against HIV seropositivity with socio-demographic and injection characteristics of IDUs

	n	OR	95%CI	p-value
Age (years)
14–17	28	1	(reference)
18–20	83	3.30	1.09 – 9.94	0.034
21–24	95	2.46	0.81 – 7.41	0.11
25–29	42	1.54	0.45 – 5.34	0.49
Educational level
High school (10–12 years) or more	67	1	(reference)
Secondary (6–9 years)	129	2.07	1.02 – 4.21	0.044
Illiteracy/primary (1–5 years)	52	2.37	1.02 – 5.51	0.045
Frequency of drug use (previous month)
<1/day	118	1	(reference)
≥1/day	130	1.60	0.90 – 2.84	0.11
Injection drug use in other cities (12 months)
no	177	1	(reference)
yes	71	1.69	0.92 – 3.11	0.089
Sharing needles and syringes (previous month)
Never	198	1	(reference)
Sometimes	40	1.91	0.92 – 3.96	0.082
About half	5	1.23	0.18 – 8.49	0.83
Every time/Almost every time	5	1.32	0.19 – 9.08	0.77

n indicates number; OR, odds ratio; CI, confidence interval; IDU, injection drug user.
*: Multivariate logistic models include age-category, educational level, frequency of injection drug use, injection drug use in other city, and sharing injection equipment as independent variables.

ISSN: 1471-2458