Table 6.

Summary measures of tobacco, alcohol, marijuana, and cocaine by trimester

	Cocaine		Non-cocaine	F/t	p
	Heavy (n=82)	Light (n=76)	(n=161)
Number of cigarettes/day	13.2±12	9.2±8	4.0±8	29.4	0.0001a
Alcohol use b
Month prior	18.1±31	10.3±16	2.1±6	22.3	0.0001a
Trimester 1	16.6±29	7.9±13	1.2±4	24.5	0.0001a
Trimester 2	10.9±25	4.3±10	0.6±3	15.2	0.0001c,d
Trimester 3	7.8±20	3.3±9	1.2±8	7.7	0.0005c
Average	13.3±22	6.5±10	1.3±5	24.9	0.0001a
Marijuana use b
Month prior	2.3±5	1.4±3	1.6±10	0.31	0.73
Trimester 1	2.3±5	1.0±3	0.6±4	4.6	0.01c
Trimester 2	2.4±6	0.5±2	0.2±2	11.7	0.0001c,d
Trimester 3	1.8±5	0.4±2	0.1±1	8.9	0.002c,d
Average	2.2±5	0.8±2	0.6±4	5.1	0.006c
Cocaine use b
Month prior	44.6±65	8.3±9		−4.8	0.0001
Trimester 1	53.6±82	7.8±7		−4.8	0.0001
Trimester 2	40.0±78	4.6±6		−3.9	0.0001
Trimester 3	18.2±34	2.5±4		−3.9	0.0001
Average	38.4±51	6.3±5		−5.4	0.0001

^aNone/light/heavy.

^bNumber of drinks, joints or “rocks”/day × number of days/week.

^cNone/heavy.

^dLight/heavy.