Table 2.

Results of mixed effects regression on substance use outcomes (n = 142)

Dependent variable		Coefficient	95 % CI	P-value
ASI Drugs CS	ILC intercept	0.001	−0.026 to 0.046	0.588
	3 months	0.015	−0.017 to 0.047	0.362
	9 months	−0.052	−0.086 to−0.019	0.002
	ILC X 3 months	−0.052	−0.096 to−0.009	0.018
	ILC X 9 months	−0.004	−0.049 to 0.042	0.872
	ICC site	0.017	0.000 to 0.361
	ICC Patient	0.335	0.234 to 0.455
	Wald χ 2(8)	93.90		0.000
ASI Alcohol CS	ILC intercept	−0.012	−0.077 to 0.052	0.708
	3 months	−0.041	−0.092 to 0.010	0.134
	9 months	−0.066	−0.120 to−0.112	0.016
	ILC X 3 months	0.008	−0.061 to 0.077	0.814
	ILC X 9 months	0.049	−0.023 to 0.121	0.182
	ICC Site	0.072	0.016 to 0.272
	ICC Patient	0.506	0.402 to 0.610
	Wald χ 2(8)	16.24		0.039
Days abstinent	ILC intercept	−2.300	−6.179 to 1.580	0.245
	3 months	0.970	−4.027 to 2.088	0.534
	9 months	2.359	−0.863 to 5.810	0.151
	ILC X 3 months	4.319	0.183 to 8.456	0.041
	ILC X 9 months	3.584	−0.751 to 7.919	0.105
	ICC Site	0.005	0.000 to 1.000
	ICC Patient	0.471	0.369 to 0.576
	Wald χ 2(8)	31.17		0.000

All analyses adjusted for site and individual, gender, age, and substitution at baseline

TAU Treatment as usual, ILC Impulsive lifestyle counselling, ASI Addiction Severity Index, CS Composite score, ICC Intraclass correlation