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Demographics at Baseline (1997) Among Youth in the Growing Up Today Study and Rates of Sports Specialization Over Timea
| Males (n = 4307) | Females (n = 5706) | |
|---|---|---|
| Age, y | 12.4 ± 1.6 | 12.6 ± 1.6 |
| Body mass index, kg/m2 | 19.9 ± 3.6 | 19.7 ± 3.5 |
| Weight status | ||
| Overweight | 18.0 | 13.5 |
| Obese | 4.6 | 3.4 |
| Engage in 1 sport for >3 seasons | ||
| 1997 | 58.4 | 58.7 |
| 1998 | 56.8 | 59.5 |
| 1999 | 57.2 | 59.0 |
| 2001 | 53.8 | 56.3 |
aValues are presented as mean ± SD or percentage.
