Table 1.
Descriptive Statistics
| Variable | Mean | Standard Deviation | Range |
|---|---|---|---|
| Age Wave I (years) | 15.98 | 1.42 | 11.42–21.38 |
| Age Wave III (years) | 22.35 | 1.42 | 17.86–28.05 |
| AHPVT Wave I | 100.61 | 14.61 | 10–141 |
| AHPVT Wave III | 102.22 | 13.20 | 11–123 |
| Male | 50.22% | ||
| Race | |||
| Caucasian | 76.31% | ||
| African American | 16.74% | ||
| American Indian | 2.57% | ||
| Asian/Pacific Islander | 4.22% | ||
| Biracial | 0.05% | ||
| Hispanic Origin | 11.83% | ||
Note. All statistics are weighted. AHPVT: Add Health Picture Vocabulary Test. The AHPVT was scaled to have a mean of 100 and standard deviation of 15.