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Number of male twins within each age category of the VTSABD and the YAFU (ages 18–28)
| Ages 10–11 | Ages 12–13 | Ages 14–15 | Age 16 | Age 17 | YAFU | |
|---|---|---|---|---|---|---|
| Ages 10–11 | 367 | |||||
| Ages 12–13 | 150 | 404 | ||||
| Ages 14–15 | 150 | 147 | 517 | |||
| Age 16 | 38 | 67 | 94 | 294 | ||
| Age 17 | 28 | 87 | 90 | 64 | 213 | |
| YAFU | 347 | 386 | 498 | 283 | 206 | 1037 |
YAFU, Young Adult Follow-Up; VTSABD, Virginia Twin Study of Adolescent Behavioral Development.
Subjects may be represented in multiple cells if they participated in more than one wave of the adolescent study.
