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. Author manuscript; available in PMC: 2011 Jul 1.
Published in final edited form as: Drug Alcohol Depend. 2010 Mar 16;110(1-2):70–79. doi: 10.1016/j.drugalcdep.2010.02.006

Table 1.

Sample Characteristics (N=8081)

Variable N (design adjusted %)
Female 4083 (48.3)
Age
 12–17 years 5041 (55.0)
 18–21 years 3040 (45.0)
Ethnicity
 Non Hispanic White 5395 (66.6)
 Non Hispanic Black 887 (12.0)
 Hispanic 1183 (15.8)
 Other Ethnicity 616 (5.5)
Cigarette Smoking
 Non-daily 6552 (81.1)
   Smoke >1 cigarette per day 2327 (36.4)
 Daily 1529 (18.9)
   Smoke >1 cigarette per day 1440 (94.5)
Length of Exposure (maximum of 2 years)
 Began smoking within the past year 4201 (50.9)
 Began smoking more than 1 year ago 3880 (49.1)