Table 5.

Summary variables of average prenatal drug use by group

	Cocaine Positive (n = 123) M ± SD	Cocaine Negative (n = 50) M ± SD	t	p
No. cigarettes/day total	10 ± 12	3 ± 5	4.9	<.0001
Alcohol usea
Month prior	3.0 ± 6	0.3 ± 1	4.7	<.0001
Trimester 1	2.3 ± 5	0.3 ± 1	4.3	<.0001
Trimester 2	2.0 ± 5	0.1 ± 2	4.4	<.0001
Trimester 3	1.7 ± 4	0.1 ± 4	4.0	<.0001
Total	2.3 ± 5	0.2 ± 0.6	4.7	<.0001
Marijuana useb
Month prior	0.9 ± 3	0.05 ± 0.3	2.9	<.005
Trimester 1	0.7 ± 3	0.04 ± 0.3	2.7	<.005
Trimester 2	0.5 ± 2	0.04 ± 0.3	2.3	<.05
Trimester 3	0.7 ± 3	0.05 ± 0.3	2.6	<.01
Total	0.7 ± 2	0.04 ± 0.3	2.6	<.005
Cocaine usec
Month prior	3.8 ± 17
Trimester 1	1.8 ± 5
Trimester 2	2.0 ± 9
Trimester 3	1.2 ± 3
Total	2.6 ± 8

^aNumber of drinks/day × number of days/week.

^bNumber of joints/day × number of days/week.

^cNumber of rocks/day × number of days/week.