Table 1.

Sample characteristics at each time point

	Time 1 ( N=1,383) N(%)	Time 2 (N=1,292) N(%)	Time 3 (N=1,198) N(%)	P-value
Age
Age 18-20	86 (7.3%)	27 (2.4%)	75 (7.4%)	0.6770
Age 21-23	702 (59.2%)	689 (60.1%)	551 (54.2%)	0.0064
Age 24-26	397 (33.5%)	431 (37.6%)	390 (38.4%)	0.0096
Education
College graduate	271 (22.9%)	292 (25.5%)	307 (30.3%)	<.0001
College in local area	719 (60.8%)	565 (49.3%)	457 (45.1%)	<.0001
Dropped out of college	99 (8.4%)	131 (11.4%)	129 (12.7%)	0.0042
High school	93 (7.9%)	159 (13.9%)	121 (11.9%)	0.0033
Race/Ethnicity
Caucasian	792 (67.3%)	678 (59.2%)	557 (55.9%)	<.0001
African American	58 (4.9%)	153 (13.4%)	114 (11.4%)	<.0001
Hispanic	102 (8.7%)	156 (13.6%)	211 (20.9%)	<.0001
Asian/Pacific Islander	86 (7.3%)	53 (4.6%)	49 (4.9%)	0.1299
American Indian/Alaskan Native	60 (5.1%)	72 (6.3%)	45 (4.5%)	0.1733
Other	68 (5.8%)	34 (3.0%)	35 (3.5%)	0.0395
Male Sex	632 (54.0%)	483 (42.2%)	479 (47.3%)	0.0040
LGBT Sexual Orientation	122 (10.3%)	93 (8.1%)	116 (11.4%)	0.4038
Smoking Status (Current versus Non-smoker)
Current smoker	502 (44.1%)	508 (45.0%)	458 (47.4%)	0.1668
No smoker	636 (55.9%)	622 (55.0%)	509 (52.6%)	0.1668
Smoking Status (Daily vs. Non-daily smoker)
Non-daily smoker	335 (29.4%)	334 (29.6%)	326 (33.7%)	0.0276
Daily smoker	167 (14.7%)	174 (15.4%)	132 (13.7%)	0.3336
Binge drinking at least once in the past 30 days	872 (76.8%)	805 (71.0%)	657 (67.7%)	<.0001
Receptive to tobacco advertising	332 (28.2%)	305 (26.6%)	268 (26.4%)	0.4275
Support for action against the tobacco industry - scale (Mean Std.)	2.6 (1.34)	2.9 (1.33)	2.9 (1.33)	<.0001
Havoc Recall	106 (8.9%)	229 (20.0%)	272 (26.8%)	<.0001
Affiliation with Partier Culture	493 (41.9%)	486 (42.4%)	408 (40.4%)	0.2683
Trend sensitivity index (Mean Std.)	9.0 (3.42)	9.1 (3.22)	8.9 (3.34)	0.2807

LGBT, lesbian, gay, bisexual and transgender

Boldface indicates statistical significance (p<0.05).