Table 3.

Substance Use Outcomes by Psychiatric Trajectory Groups, 6 Months Through 9 Years

	Low Severity Group (n = 338)	Deteriorating Group (n = 256)	Improving Group (n = 174)	High Severity Group (n = 166)	p
% abstinence from drug in past month at
6 months	92.2	86.6	77.9	76.0	< .0001
1 year	87.9	88.8	81.6	84.9	ns
5 year	92.6	83.7	92.7	83.6	.0006
7 year	94.1	84.5	89.3	81.5	.0002
9 year	90.0	82.3	90.5	76.3	.0003
% abstinence from any alcohol in past month at
6 months	63.5	70.1	62.9	60.0	ns
1 year	59.3	67.4	60.1	57.9	ns
5 year	47.7	49.4	64.6	59.9	.0008
7 year	47.7	49.3	62.3	57.5	.0131
9 year	50.2	56.7	64.9	56.1	.0347
% abstinence from five or more alcoholic drinks in past month at
6 months	81.1	85.5	86.2	78.7	ns
1 year	82.6	83.1	79.2	74.2	ns
5 year	80.4	73.6	84.2	84.8	.0188
7 year	80.8	75.7	82.8	82.2	ns
9 year	87.2	77.3	85.8	78.4	.0126
Number of days using drugs in past month (M) at
6 months	1.01	2.36	4.06	6.02	< .0001
1 year	1.55	2.42	3.57	5.92	.0001
5 year	2.18	4.12	3.50	6.64	< .0001
7 year	2.08	6.66	4.19	10.16	< .0001
9 year	3.12	9.74	4.71	11.54	< .0001
Number of days using alcohol in past month (M) at
6 months	3.12	2.39	4.35	4.31	ns
1 year	3.48	3.21	3.88	5.02	ns
5 year	5.23	5.92	3.74	4.34	.0010
7 year	4.92	5.66	3.92	4.53	.0259
9 year	4.87	5.04	4.24	4.71	ns
Number of days using five or more alcoholic drinks in past month (M) at
6 months	1.34	1.06	1.66	2.06	ns
1 year	1.09	1.29	1.46	2.28	ns
5 year	1.36	2.07	1.35	1.73	.0242
7 year	0.94	2.06	1.21	1.52	ns
9 year	0.93	1.68	1.35	1.75	.0125

Note: ns = not significant at p < .05 level.