| Odds Ratio (95% Confidence Interval) | |
---|---|---|
 | 9-yrs | 15-yrs |
Sex | Â | Â |
   Girls | 1.00 | 1.00 |
   Boys | 3.19 (2.26, 4.49)* | 1.19 (0.88, 1.61) |
Season | Â | Â |
   Winter | 1.00 | 1.00 |
   Spring | 3.28 (2.08, 5.18)* | 1.56 (1.05, 2.32)** |
   Fall | 1.44 (0.93, 2.22) | 1.28 (0.90, 1.81) |