. 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 2.

Adjusted means, standard deviations, and ANCOVA models¹ comparing oral naltrexone versus depot naltrexone on days retained, proportion of heroin negative urines, and proportion of heroin negative urines with missing imputed as positive.

	Depot Naltrexone		Oral Naltrexone
					ANCOVA
Outcome Variable	M	SD	M	SD	F (1, 111)	Adj. R²
Days Retained in Treatment	42.5	3.3	31.8	2.5	6.49^*	0.086
Proportion of Heroin Negative Urine Samples	0.77	0.06	0.70	0.05	1.00	0.024
Proportion of Heroin Negative Urine Samples (Missing Imputed as Positive)	0.52	0.05	0.37	0.04	5.26^*	0.048

Models include participant race, age, and years of regular heroin use as covariates.

p < 0.05