Overall profile survey responsea					Overall daily survey completionb					Overall daily survey cumulative responsec
	Total (n=202) percent	R (n=105) percent	NR (n=97) percent	χ2	ΦC	Total (n=105) percent	R (n=91) percent	NR (n=14) percent	χ2	ΦC	Total (n=202) percent	R (n=91) percent	NR (n=101) percent	χ2	ΦC
Sociodemographics
Male	45.5	39.0	52.7	3.701	0.137	39.0	37.4	50.0	0.814	0.088	45.5	37.4	52.3	4.447*	0.150
White	71.8	75.2	68.0	1.289	0.080	75.2	79.1	50.0	5.523*	0.229	71.8	79.1	65.8	4.403*	0.148
Parental college education	62.9	68.6	56.7	3.044	0.123	68.6	69.2	64.3	0.138	0.036	62.9	69.2	57.7	2.869	0.119
School location				1.424	0.084				10.970**	0.323				6.409*	0.178
Urban	17.3	14.3	20.6			14.3	9.9	42.9			17.3	9.9	23.4
Rural	49.0	50.5	47.4			50.5	53.8	28.6			49.0	53.8	45.0
Suburban	33.7	35.2	32.0			35.2	36.3	28.6			33.7	36.3	31.5
College plans
Definite college plans	50.0	52.5	47.3	0.516	0.052	52.5	52.9	50.0	0.040	0.020	50.0	52.9	47.7	0.521	0.052
Substance use
Alcohol: Lifetime	70.1	75.5	64.6	2.763	0.119	75.5	75.6	75.0	0.002	0.004	70.1	75.6	24.4	2.212	0.107
Alcohol: Past 12 months	64.8	68.0	61.5	0.916	0.069	68.0	67.4	72.7	0.125	0.036	64.8	67.4	62.6	0.486	0.050
Alcohol: Binge, past 2 weeks	25.5	33.3	17.5	6.443*	0.181	33.3	34.5	25.0	0.427	0.066	25.5	34.5	18.3	6.628*	0.184
Marijuana: Lifetime	47.0	45.2	49.0	0.284	0.038	45.2	43.3	57.1	0.933	0.095	47.0	43.3	50.0	0.883	0.066
Marijuana: Past 12 months	37.9	37.9	37.9	0.000	0.000	37.9	36.0	50.0	1.014	0.099	37.9	36.0	39.4	0.254	0.036
Other illegal drug: Lifetime	14.4	9.7	18.8	3.359	0.130	9.7	6.7	30.8	7.528**	0.270	14.4	6.7	20.2	7.449**	0.193
Other illegal drug: Past 12 months	8.6	3.9	13.7	5.946*	0.174	3.9	2.2	15.4	5.196	0.226	8.6	2.2	13.9	8.387**	0.206