Table 1.

Sample characteristics (N = 17,256)

Variable	Results
Gender (%)
Male	46.0
Female	54.0
Race/ethnicity (%)
White	80.7
Non-White	19.3
Age, years (%)
12–14	49.7
15–16	19.6
17–18	30.6
Cigarette smoking–related behaviors
Initiation of cigarette smoking before age 12 (%)	7.9
Frequency of cigarette smoking, past 30 days	1.45 (5.52)
Frequency of cigarette smoking on school property,  past 30 days	0.17 (1.62)
Number of cigarettes smoked, past 30 days	0.38 (1.59)
Personal beliefs
Perceived social expectancies from smoking  cigarettes	1.76 (0.71)
Perceived harm of heavy smoking	3.46 (0.80)
Personal disapproval of cigarette smoking	3.34 (0.88)
Perceived tobacco availability	2.86 (1.24)
Perceived smoking by peers	1.72 (1.23)
Perceived enforcement of school antismoking policy	3.52 (0.78)
Perception of community disapproval of adolescents’ cigarette smoking	3.33 (0.81)

Note. Results are means with SDs, unless noted otherwise.