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Participant sex and age for four years of observations included in current report
| Female | Male | Total | Mean Age | Age Range | |
|---|---|---|---|---|---|
| Year 1 | 382 | 392 | 774 | 16.7 | 12.9-22.9 |
| Year 2 | 361 | 368 | 729 | 17.7 | 14.0-23.8 |
| Year 3 | 343 | 361 | 704 | 18.7 | 14.9-24.8 |
| Year 4 | 328 | 329 | 657 | 19.7 | 16.0-25.8 |
