Table 3.

Group Differences on Predictor and Outcome Variables Measured at the 18-Month Visit

	Control (n = 64)		Intervention (n =67)
	Mean	SD	Mean	SD	p value
Mother-child interaction
Observed maternal competencea	2.7	0.4	2.8	0.4	.72
Observed child responsivenessa	3.1	0.3	3.1	0.3	.73
Child Abuse Potential Inventory
Maternal rigidityb	31.3	18.4	34.7	19.1	.27

	N	%	N	%
Drug use during last 6 mo
Alcohol	37	58	39	58	1.0
Marijuana	20	31	17	25	.56
Methadone	10	16	11	16	.54
Cocaine and/or heroin	23	36	29	43	.24

SD, standard deviation.

^aHigher scores optimal.

^bHigher scores worse.