Table 1.

Participant characteristics (means or percentages) for whole sample and by smoking status (total sample N = 190)

Characteristic	Total sample M (SD) or %	Non smokers M (SD) or %	Smokers M (SD) or %
Age	16.8 (1.2)	16.7 (1.2)	17.0 (1.2)
Gender, % female	51	51	51
Race/ethnicity, %
White	85	84	86
Asian	<1	1	<1
Non-Hispanic Black	4	5	2
Hispanic/Latino	6	4	8
Native American	<1	1	<1
Other or multi-ethnicity/race	4	4	3
Cigarettes smoked per day	–	–	5.5 (5.1)
Age at first puff	–	–	12.8 (2.6)
Age at first whole cigarette	–	–	13.9 (2.0)
Age began smoking daily	–	–	14.8 (1.9)

Note: Smokers and nonsmokers did not significantly differ on demographic characteristics (all ps > .05).