Table 3.

Baseline Factors Associated with Having Sex with Casual Partners in the Past Year (Logistic Regression, N=1262)

Factor	Univariate OR (95% CI)	Final model OR (95% CI)	p
Ages
≤24	1.000
25–35	0.751 (0.370–1.523)
≥36	0.493 (0.249–0.974
Marital status
Never married	1.000	1.00
Married or live together	0.261 (0.195–0.350)	0.299 (0.221–0.405)	0.000
Divorced/separated/widowed	0.587 (0.401–0.859)	0.743 (0.495–1.115)	0.151
Age at first taking drugs
≤19	1.000	1.00
20–30	0.797 (0.605–1.049)	0.984 (0.717–1.351)	0.920
≥31	0.319 (0.194–0.525)	0.419 (0.243–0.723)	0.002
Refused to answer	0.715 (0.412–1.241)	0.554 (0.289–1.065)	0.076
Exchanged needles or received clean needles from the Needle Exchange Center in the past year
No	1.000
Yes	1.402 (1.009–1.948)
Received methadone substitution treatment in the past year
No	1.000
Yes	0.679 (0.503–0.916)
Received AIDS advice or testing from authorities in the past year
No	1.000	1.00
Yes	0.636 (0.483–0.838)	0.701 (0.508–0.968)	0.031