Table III.

Differences between 1644 college women with effective and ineffective contraception.

Variable	Levels	Effective contraceptive use		Ineffective contraceptive use		χ2 or t-test
		N or mean	Percentage or SD	N or mean	Percentage or SD
Race	White women	1099	85	194	15	26.15***
	Women of color	545	75.8	174	24.2
Mean drinks/week	0	232	84.7	42	15.3	19.96***
	1–7	1064	83.6	209	16.4
	8 or more	341	74.6	116	25.4
Recent binge drinking	No binges in 90 days	629	84.9	112	15.1	7.91**
	1 or more binges	1015	79.9	256	20.1
Most drinks	None	112	85.5	19	14.5	17.56**
	1–4	393	85.1	69	14.9
	5–8	553	81.1	129	18.9
	9–11	146	74.5	50	25.5
	12 or more	80	73.4	29	26.6
No. of binges in 90 days		5.11	8.85	7.27	10.8	3.47***
Risk drinker*	No	609	85.1	107	14.9	8.33**
	Yes	1035	79.9	261	20.1
Type contraception	Condoms only	285	65.5	150	34.5	134.96***
	Condoms with other	55	87.3	8	12.7
	Pills only	428	88.1	58	11.9
	Pills with condoms	437	92.0	38	8.0
	Other	46	66.7	23	33.3
Who made contraception decision?	Self	707	81.8	157	18.2	34.21***
	Self and partner	432	77.7	124	22.3
	Self and others	316	87.5	45	12.5
	Health professional	72	86.8	11	13.3
	Parent	71	84.5	13	15.5
	Partner	13	50.0	13	50.0
Age first contraception		17.08	1.81	16.7	1.75	3.47***

Notes:

^*Risk drinker was a woman who reported that in the last 90 days she had at least one binge episode or whose mean drinks per week were eight or more.

^**p < 0.01 and

^***p < 0.0001.