Table 1.
Sample Demographics
| Age Group (y) |
Overall |
Males |
Females |
|||||||||
| n |
Years |
n |
Years |
n |
Years |
|||||||
| Mean ± SD |
Median |
Minimum– Maximum |
Mean ± SD |
Median |
Minimum– Maximum |
Mean ± SD |
Median |
Minimum– Maximum |
||||
| Youtha (5–9) | 170 | 8.0 ± 1.1 | 7.9 | 5.1–9.9 | 122 | 7.8 ± 1.0 | 7.8 | 5.4–9.9 | 48 | 8.4 ± 1.3 | 8.9 | 5.1–9.9 |
| Youtha (10–13) | 436 | 12.7 ± 1.1 | 13.0 | 10.0–13.9 | 238 | 12.7 ± 1.1 | 13.1 | 10.0–13.9 | 198 | 12.7 ± 1.1 | 12.9 | 10.0–13.9 |
| High school (14–18) | 5416 | 16.1 ± 1.4 | 15.9 | 14.0–18.9 | 3743 | 16.1 ± 1.4 | 16.0 | 14.0–18.9 | 1673 | 16.0 ± 1.4 | 15.8 | 14.0–18.9 |
| College (19–23) | 740 | 20.4 ± 1.1 | 20.3 | 19.0–23.9 | 497 | 20.4 ± 1.1 | 20.3 | 19.0–23.8 | 243 | 20.4 ± 1.0 | 20.3 | 19.0–23.9 |
a
The youth groups were combined (5–13 y) for the multivariate analysis and were divided (5–9 y and 10–13 y) to compute percentile scores.