Gender
Male	52.9%
Female	47.1%
Age
15-17 years	34.8%
18-21 years	65.2%
Race/Ethnicity
White, Non-Hispanic	69.5%
Black, Non-Hispanic	10.3%
Other, Non-Hispanic	4.7%
Hispanic	11.1%
2+ races, Non-Hispanic	4.5%
Smoking status at baseline
Never smoker	66.9%
Ever, not past 30-day smoker	19.8%
Past 30-day smoker	13.3%
Region
Northeast	21.0%
South	36.2%
Midwest	26.8%
West	16.0%