Table 2.

Demographic characteristics overall and by class

	Overall	Classes			F or χ2 (Effect size)	Post hoc
		1 (High Alcohol and Drug Use)	2 (Low Physical Activity)	3 (Low Risk Behavior)
N (%)	105,781	24,824 (23.5%)	43,607 (41.2%)	37,350 (35.3%)
Gender (%)					670.74* (Φ= .10)
Female	65.4	59.2	69.1	65.2		1,3<2 1<3
Male	34.6	40.8	30.9	34.8		2,3<1 2<3
Age in years (Mean, SD)	22.67 (5.90)	22.12 (4.80)	23.32 (6.68)	22.27 (5.90)	425.66* (η2=.70)
Race/ethnicity (%)					2210.34* (Φ= .15)
White	68.6	73.2	62.4	72.7		2<1,3
Asian	9.9	6.0	13.8	8.0		1,3<2 1<3
Black	4.8	3.1	6.2	4.2		1,3<2 1<3
Hispanic	5.8	5.4	6.6	5.2		1,3<2
American Indian	0.7	0.7	0.7	0.7		NS
Multiple race	6.9	8.3	6.5	6.5		2,3<1
No response	1.8	1.8	2.2	1.4		1,3<2
Other	1.4	1.5	1.6	1.3		3<2
Enrollment status (%)					270.77* (Φ= .06)
Full-time	91.6	93.0	90.2	92.5		2<1,3
Part-time	7.7	6.4	9.0	7.0		1,3<2 1<3
Other	0.7	0.6	0.8	0.6		1,3<2
Campus size (%)					262.27* (Φ= .08)
<10 000	37.1	36.1	23.4	39.1		1,2<3
10 000 to 19 999	23.4	25.1	22.1	23.9		2,3<1 2<3
20 000+	39.5	38.6	42.1	37.0		1,3<2 3<1
Class year (%)					685.310* (Φ= .08)
1st year	20.9	20.4	19.8	22.6		1,2<3
2nd year	20.0	21.0	18.9	20.8		2<1,3
3rd year	19.8	21.0	19.3	19.5		2,3<1
4th or more year	21.1	23.3	20.8	20.1		2,3<1
Graduate/ professional	17.2	13.6	20.2	16.1		1<2,3 3<2
Other	0.9	0.7	1.1	0.9		1<2,3
Region (%)					476.16* (Φ= .07)
Northeast	37.0	41.1	37.5	33.8		2,3<1 3<2
Midwest	17.2	15.0	16.7	19.1		1,2<3 1<2
South	22.6	23.1	22.1	22.7		2,3<1
West	23.3	20.6	23.8	24.4		1<2,3
College type (%)					51.90* (Φ= .02)
Public	59.0	57.0	59.3	59.8		1<2,3
Private	41.0	43.0	40.7	40.2		2,3<1

Notes: NS: Not significant. Information on “Other” not available in survey.

^*p<.001