Table 2.

Treatment characteristics and opioid relapse

Treatment characteristics	Number	%	Non-relapse n (%)	Relapse n (%)	p value
Initial drug use age
< 20	186	28.4	152 (81.7%)	34 (18.3%)	0.015
20–30	374	57.1	328 (87.7%)	46 (12.3%)
> 30	95	14.5	89 (93.7%)	6 (6.3%)
Duration of drug use in the past (year)
< 5	125	19.1	114 (91.2%)	11 (8.8%)	< 0.001
5–10	253	38.6	235 (92.9%)	18 (7.1%)
> 10	277	42.3	220 (79.4%)	57 (20.6%)
The number of previous treatment
No	132	20.2	109 (82.6%)	23 (17.4%)	0.259
1–2	329	50.2	290 (88.1%)	39 (11.9%)
3 or more	194	29.6	170 (87.6%)	24 (12.4%)
Comorbidity
No	350	53.4	259 (84.9%)	46 (15.1%)	0.206
Yes	305	46.6	310 (88.6%)	40 (11.4%)
Antiretroviral therapy
No	585	89.3	506 (86.5%)	79 (13.5%)	0.527
Yes	70	10.7	63 (90.0%)	7 (10.0%)
Treatment time (year)
< 3	196	29.9	150 (76.5%)	46 (23.5%)	< 0.001
3–6	224	34.2	202 (90.2%)	22 (9.8%)
> 6	235	35.9	217 (92.3%)	18 (7.7%)
Daily methadone dose (mg)
< 60	238	36.3	203 (85.3%)	35 (14.7%)	0.457
60–120	323	49.3	281 (87.0%)	42 (13.0%)
> 120	94	14.4	85 (90.4%)	9 (9.6%)
Adherence
Yes	480	73.3	433 (90.2%)	47 (9.8%)	< 0.001
No	175	26.7	136 (77.7%)	39 (22.3%)