Table 3.

Frequencies and amounts of prenatal drug use by group

	Cocaine Positive (n = 123) M ± SD	Cocaine Negative (n = 50) M ± SD	t	p
Cigarettes/day
Month prior	9.1 ± 9	5.2 ± 13	1.9	<.07
Trimester 1	9.2 ± 11	5.0 ± 13	2.1	<.05
Trimester 2	9.0 ± 10	5.0 ± 13	1.9	<.06
Trimester 3	9.0 ± 10	4.6 ± 13	2.1	<.05
Alcohol drinks/day
Months prior	1.1 ± 1	0.3 ± 0.6	534	<.0001
Trimester 1	0.9 ± 1	0.4 ± 0.8	3.8	<.001
Trimester 2	0.0 ± 1	0.2 ± 0.5	5.7	<.0001
Trimester 3	0.8 ± 1	0.1 ± 0.5	5.9	<.0001
Alcohol days/week
Months prior	2.3 ± 2	0.6 ± 2	5.9	<.0001
Trimester 1	2.1 ± 2	0.6 ± 1	5.2	<.0001
Trimester 2	1.9 ± 2	0.3 ± 1	5.9	<.0001
Trimester 3	1.7 ± 2	0.3 ± 1	5.7	<.0001
Joints/day
Month prior	0.4 ± 0.9	0.08 ± 0.3	3.7	<.001
Trimester 1	0.3 ± 0.8	0.03 ± 0.2	4.1	<.0001
Trimester 2	0.3 ± 0.6	0.05 ± 0.2	3.9	<.001
Trimester 3	0.5 ± 0.8	0.06 ± 0.2	4.7	<.0001
Marijuana days/week
Month prior	1.1 ± 2	0.2 ± 0.8	4.5	<.0001
Trimester 1	0.9 ± 2	0.3 ± 0.1	3.0	<.005
Trimester 2	0.8 ± 2	0.1 ± 0.7	4.0	<.0001
Trimester 3	1.0 ± 2	0.2 ± 0.8	4.3	<.0001