Table 2.

Duration of intervals between treatment episodes and associated characteristics at treatment interruption, 2001–2008

	Total N	Number of events*	Percentile 75 (days)	Out of treatment at 1 year %	Out of treatment at 3 years %	Out of treatment at 5 years %	P-value
All	1581	618	478	79	62	57
Sex
Male	1118	445	455	79	62	56	0.395
Female	461	173	505	80	64	59
Age
≤30 years	591	235	432	79	63	56	0.886
>30 years	986	382	491	79	63	58
Living conditions
Fixed abode	482	178	612	82	65	58	0.996
Without fixed abode	30	12	501	87	62	57
Institution/Prison	149	53	496	78	65	60
Full-time job
No	1425	572	448	77	61	56	0.011
Yes	154	46	806	82	72	66
Social insurance
No	1460	582	466	77	62	57	0.071
Yes	119	36	547	71	72	65
Social aid
No	1377	533	474	79	63	57	0.674
Yes	202	85	496	79	59	67
Good social condition
No	1388	567	442	77	60	56	<0.001
Yes	193	51	1215	89	77	71
Good psychological condition
No	1350	547	442	77	60	54	0.003
Yes	231	71	960	84	75	64
Good physical condition
No	1205	500	433	77	60	53	<0.001
Yes	376	118	794	83	71	64
Hepatitis C status
Negative or Unknown	1316	510	488	79	63	57	0.753
Positive	263	108	445	72	60	57
HIV Status
Negative or Unknown	1530	597	484	79	62	57	0.519
Positive	49	21	395	72	60	57
Currently injecting
No	1470	572	480	79	63	57	0.767
Yes	111	46	433	79	61	57
Reason for stopping treatment
Drop-out	488	217	391	75	58	48	<0.001
Methadone withdrawal	407	125	826	85	71	63
Other reason	686	276	410	77	61	55
Daily methadone dosage
0.1 to 30 mg	548	165	945	85	73	65	<0.001
31 to 50 mg	272	124	390	77	58	48
51 to 75 mg	204	101	289	72	53	45
>75 mg	266	120	312	72	55	49

* An event is defined by re-entry to treatment, i.e.having a new document of entry to treatment.