Table 1.
Demographic Characteristics and Smoking Behaviors of Study Sample (n=19,678) of 10th-Grade Students after Excluding Underweight Adolescents (Monitoring the Future 2008, 2009)
| Characteristic | White (n=13,679) | African American (n=2859) | Hispanic (n=3140) | Total (N=19,678) |
|---|---|---|---|---|
| % BMI categories | ||||
| Healthy (5th–84th percentile) | 75.3 | 63.9 | 67.8 | 72.5 |
| Overweight (85th–94th percentile) | 14.0 | 19.4 | 17.5 | 15.3 |
| Obese (95th–98th percentile) | 8.8 | 13.3 | 12.1 | 10.0 |
| Severely obese (≥99th percentile) | 1.9 | 3.5 | 2.6 | 2.2 |
| % female | 52.5 | 54.9 | 53.5 | 53.0 |
| Mean age (SD) in years | 16.09 (0.43) | 16.15 (0.57) | 16.06 (0.52) | 16.09 (0.47) |
| Modal parental educationa | 4 | 3 | 1 | 4 |
| Ever smoked cigarettesb, % | 32.2 | 25.3 | 37.2 | 32.0 |
| Smoked in the past 30 daysc, % | 14.4 | 6.2 | 11.8 | 12.8 |
a
Missing data for 4.9% of the sample. 1=grade school completion or less; 2=some high school; 3=high school completion; 4=some college; 5=college completion; and 6=graduate or professional school.
b
Missing data for 2.0%.
c
Missing data for 2.1%.
SD, standard deviation.