Table 1.

Treatment duration and associated characteristics at entry, 2001-2008

	Total N	Number of events*	Median (days)	In treatment at 1 year %	In treatment at 3 years %	In treatment at 5 years %	P-value
All	1666	982	898	69	45	34
Had a previous treatment
Yes	1314	765	982	71	50	37	0.001
No	352	217	643	63	36	27
Sex
Male	1190	711	868	69	42	32	0.088
Female	476	271	1039	73	50	38
Age
≤30 years	700	454	718	64	41	28	< 0.001
>30 years	965	527	1037	72	50	40
Living conditions
Fixed abode	1282	715	1091	74	50	36	<0.001
Without fixed abode	160	110	377	50	27	25
Institution/Prison	189	138	434	52	27	23
Full-time job
No	1260	741	876	70	48	32	0.925
Yes	406	241	957	72	48	37
Social insurance
No	1435	858	889	68	43	33	0.093
Yes	231	124	1117	74	51	39
Social aid
No	1199	711	888	71	43	34	0.661
Yes	467	271	916	71	43	36
Good social condition
No	1241	741	868	71	43	34	0.263
Yes	425	241	1078	71	51	39
Good psychological condition
No	1239	741	888	71	43	34	0.26
Yes	427	241	960	71	47	39
Good physical condition
No	751	456	887	71	43	34	0.726
Yes	915	526	916	71	43	34
Hepatitis C status
Negative or Unknown	1132	660	909	72	46	32	0.69
Positive	534	322	869	68	44	36
HIV status
Negative or Unknown	1562	918	909	70	50	32	0.852
Positive	104	64	779	71	42	38
Currently injecting
No	1065	602	946	72	41	35	0.089
Yes	601	380	792	63	48	35
Number of methadone deliveries per week
1 to 4	454	236	1061	75	49	37	0.009
>4	1060	646	842	67	43	32
Daily methadone dosage
0.1 to 30 mg	450	260	842	68	40	29	0.407
31 to 50 mg	507	297	1057	72	48	34
51 to 75 mg	335	191	869	70	46	38
>75 mg	318	192	918	68	44	34

* An event is defined by the interruption of treatment, i.e. having an “end of treatment” document.