. Author manuscript; available in PMC: 2011 Apr 1.

Published in final edited form as: J Clin Psychiatry. 2010 Jul 13;71(10):1371–1378. doi: 10.4088/JCP.09m05080ecr

Table 3.

Full ANCOVA models comparing Oral Behavior Naltrexone Therapy (Oral/BNT) versus full-dose depot naltrexone (Hi-Depot/CBT) on days retained, proportion of heroin negative urines, and proportion of heroin negative urines with missing imputed as positive.

Outcome Variable	df	Mean Square	F	p-value
Days Retained in Treatment
Treatment Group	1	3830.85	11.84	0.001
Race	1	1803.82	5.58	0.022
Baseline Heroin Use	1	10.80	0.03	0.856
Treatment Group x Baseline Heroin Use	1	2106.99	6.51	0.014
Error	53	323.56
Adjusted R² = 0.197

Proportion of Heroin Negative Urine Samples
Treatment Group	1	0.867	7.32	0.009
Race	1	0.094	0.71	0.379
Baseline Heroin Use	1	0.000	0.00	0.997
Treatment Group x Baseline Heroin Use	1	0.693	5.85	0.019
Error	48	0.118
Adjusted R² = 0.077

Proportion of Heroin Negative Urine Samples (Missing Imputed as Positive)
Treatment Group	1	1.321	13.51	0.001
Race	1	0.128	1.31	0.257
Baseline Heroin Use	1	0.046	0.47	0.497
Treatment Group x Baseline Heroin Use	1	0.876	8.96	0.004
Error	53	0.098
Adjusted R² = 0.173