|  |  |  | Sports club members |  |  |  |  | ||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
 | All (n = 1077) | Boys (n = 549) |  | Girls (n = 528) | ||||||||
Training Characteristics | OR* | 95% CI | P Value# | OR | 95% CI | P Value§ | OR | 95% CI |  | P Value¤ | ||
Main sports | ||||||||||||
 Team and contact sports | 1.0 |  |  | 1.0 |  |  | 1.0 |  |  |  | ||
 Individual sports | 0.59 | 0.37–0.65 | < 0.001 | 0.45 | 0.28–0.72 | 0.001 | 0.70 | 0.48–1.01 |  | 0.059 | ||
Starting training (age) | ||||||||||||
 4–7 years old | 1.0 |  |  | 1.0 |  |  | 1.0 |  |  |  | ||
 8–11 years old | 0.99 | 0.76–1.31 | 0.978 | 0.82 | 0.56–1.20 | 0.305 | 1.24 | 0.82–1.86 |  | 0.304 | ||
 12–15 years old | 0.60 | 0.42–0.85 | 0.004 | 0.59 | 0.36–0.97 | 0.037 | 0.65 | 0.39–1.07 |  | 0.090 | ||
Active training years at least 2 times/week | ||||||||||||
 0–4 years | 1.0 |  |  | 1.0 |  |  | 1.0 |  |  |  | ||
 5–8 years | 1.38 | 1.03–1.83 | 0.029 | 1.55 | 1.01–2.37 | 0.045 | 1.24 | 0.84–1.83 |  | 0.274 | ||
 9–11 years | 1.84 | 1.31–2.58 | < 0.001 | 1.89 | 1.19–2.98 | 0.007 | 1.88 | 1.13–3.14 |  | 0.016 | ||
Training hours per week during training season | ||||||||||||
 3–6 h/week | 1.0 |  |  | 1.0 |  |  | 1.0 |  |  |  | ||
 7–14 h/week | 1.61 | 1.21–2.12 | 0.001 | 1.57 | 1.06–2.32 | 0.025 | 1.65 | 1.11–2.45 |  | 0.014 | ||
 15 h or more/week | 2.12 | 1.42–3.15 | < 0.001 | 2.16 | 1.28–3.64 | 0.004 | 2.04 | 1.10–3.76 |  | 0.023 | ||
Training hours per week during competition season | ||||||||||||
 3–6 h/week | 1.0 |  |  | 1.0 |  |  | 1.0 |  |  |  | ||
 7–14 h/week | 1.55 | 1.18–2.06 | 0.002 | 1.39 | 0.94–2.04 | 0.097 | 1.77 | 1.17–2.67 |  | 0.006 | ||
 15 h or more/week | 1.78 | 1.20–2.63 | 0.004 | 1.67 | 0.99–2.81 | 0.055 | 1.91 | 1.05–3.48 |  | 0.033 | ||
The amount of competitions during last 12 months | ||||||||||||
 7–19 competitions | 1.0 |  |  |  |  | 1.0 |  |  | 1.0 |  |  |  |
 20–39 competitions | 1.34 | 0.93–1.92 | 0.118 | 1.48 | 0.89–2.47 | 0.132 | 1.29 | 0.77–2.15 |  | 0.331 | ||
 40 competitions or more | 1.55 | 1.05–2.28 | 0.028 | 2.02 | 1.21–3.37 | 0.007 | 0.92 | 0.48–1.77 |  | 0.809 | ||
Resting days per week during training season | ||||||||||||
 3 resting days/week | 1.0 |  |  | 1.0 |  |  | 1.0 |  |  |  | ||
 2 resting days/week | 1.13 | 0.79–1.59 | 0.507 | 1.25 | 0.77–2.02 | 0.371 | 1.00 | 0.61–1.67 |  | 0.977 | ||
 1 resting day/week | 1.35 | 0.95–1.93 | 0.098 | 1.54 | 0.94–2.53 | 0.088 | 1.18 | 0.70–1.96 |  | 0.538 | ||
 0 resting day/week | 1.62 | 0.61–4.26 | 0.333 | 1.30 | 0.36–4.78 | 0.688 | 2.16 | 0.49–9.53 |  | 0.310 |