Table 3.

Summary statistics on health state episode durations

		Episode Duration (months)				Censored
	N	Mean	Median	Q1	Q3	N	%
Primary Heroin Users [N=629]
Incarceration	3422	11.6	6	3	13	95	3.0
Treatment	2546	16.5	10	3	18	169	7.0
Abstinence	1424	37.1	12	4	35	243	17.0
Non-Daily Use	2268	14.7	8	3	18	65	3.0
Daily Use	4202	12.7	7	3	15	57	1.0
All Episodes	13862	15.9	8	3	17	629	4.5
Primary Methamphetamine Users [N=474]
Incarceration	1101	7.6	4	2	9	65	6.0
Treatment	880	5.1	3	2	6	37	4.0
Abstinence	1613	18.0	7	3	20	283	18.0
Non-Daily Use	1260	15.1	6	1.5	18.5	72	6.0
Daily Use	1346	17.3	9	4	21	17	1.0
All Episodes	6200	13.6	6	2	14	474	7.6
Primary Cocaine Users [N=694]
Incarceration	1073	7.8	4	2	10	64	6.0
Treatment	1297	5.8	3	1	7	80	6.0
Abstinence	2759	21.3	7	3	21	432	16.0
Non-Daily Use	2724	15.7	6	1	18	88	3.0
Daily Use	1677	18.1	9	4	21	30	2.0
All Episodes	9530	15.5	6	2	16	694	7.3

Q1 indicates the lower (first) quartile and Q3 the upper (third) quartile.