Table 4.

Generalized linear mixed models (GLMM) logistic regression results: Predictors of continued drug-related risk behaviors

Variables	Drug injection		Syringe sharing
	Unadjusted OR	Adjusted OR	Unadjusted OR	Adjusted OR
Age	0.99 (0.98 ~ 0.99) ***	0.98(0.97 ~ 0.99) ***	0.97(0.96 ~ 0.98) ***	0.97(0.95 ~ 0.98)***
Years of drug use before MMT	1.03(1.02 ~ 1.04) ***	1.04(1.03 ~ 1.06) ***	1.03(1.02 ~ 1.05) ***	1.03(1.01 ~ 1.05)**
Sex
Male	1.55(1.35 ~ 1.79) ***	1.35(1.08 ~ 1.69) *	1.62(1.25 ~ 2.10) ***	1.27(0.90 ~ 1.79)
Female	Reference	Reference	Reference	Reference
Employment status
Employed	0.96 (0.89 ~ 1.04)	0.85(0.74 ~ 0.97) *	1.04(0.92 ~ 1.17)	1.02(0.85 ~ 1.23)
Unemployed	Reference	Reference	Reference	Reference
Education
Senior school or higher	0.69(0.61 ~ 0.78) ***	0.71(0.58 ~ 0.88) **	0.61(0.49 ~ 0.75) ***	0.81(0.59 ~ 1.12)
Junior school	1.00(0.91 ~ 1.11)	0.98(0.83 ~ 1.16)	1.03(0.23 ~ 4.67) ***	1.19(0.95 ~ 1.49)
Primary school	Reference	Reference	Reference	Reference
Marriage status
Married	0.75(0.69 ~ 0.81) ***	0.81(0.71 ~ 0.93) **	0.73(0.65 ~ 0.82) ***	0.91(0.75 ~ 1.10)
Unmarried	Reference	Reference	Reference	Reference
HIV status
Positive	2.12(1.80 ~ 2.49) ***	1.70(1.23 ~ 2.35) **	5.22(4.44 ~ 6.15) ***	4.73(3.53 ~ 6.35) ***
Negative	Reference	Reference	Reference	Reference
HCV status
Positive	1.87(1.70 ~ 2.06) ***	2.58(2.19 ~ 3.04) ***	1.67(1.40 ~ 1.99) ***	1.97(1.51 ~ 2.58) ***
Negative	Reference	Reference	Reference	Reference
MMT mean dosage	1.00a(1.00b ~ 1.00c) *	1.00d(0.99 ~ 1.00e) **	1.00(1.00 ~ 1.00)	1.00(1.00 ~ 1.00)
Treatment adherence	0.42(0.36 ~ 0.48) ***	0.18(0.16 ~ 0.19) ***	0.34(0.30 ~ 0.38) ***	0.42(0.36 ~ 0.48) ***
Longest duration of abstinence	0.86(0.85 ~ 0.87) ***	0.91(0.89 ~ 0.93) ***	0.86(0.84 ~ 0.88) ***	0.92(0.89 ~ 0.95) ***
Unprotected sex
Yes	1.05(0.95 ~ 1.16)	1.13(0.99 ~ 1.29)	1.13(0.96 ~ 1.33)	1.27(1.06 ~ 1.53) ***
No	Reference	Reference	Reference	Reference
Multiple sexual partners
Yes	1.11(0.96 ~ 1.29)	0.91(0.75 ~ 1.12)	1.42(1.15 ~ 1.77) **	1.49(1.17 ~ 1.90) **
No	Reference	Reference	Reference	Reference

^*P < 0.05, ^**P < 0.01, ^***P < 0.001.

Exact value: ^a: 0.998; ^b: 0.996; ^c: 0.999; ^d: 0.995; ^e: 0.998.