Table 1.
Characteristics of study participants (N=394)
| Characteristic | |
|---|---|
| Age (years), mean±SD | 16.4±0.78 |
| School year, number (%) | |
| First year | 197 (50.0) |
| Second year | 153 (38.8) |
| Third year | 44 (11.2) |
| BMI (kg/m2), mean±SD | 20.5±1.76 |
| BMI <18.5 kg/m2, no. (%) | 47 (11.9) |
| Age at menarche (years), mean±SD | 12.5±1.34 |
| Age at starting training (years), mean±SD | 11.1±3.80 |
| Type of sport, number (%) | |
| Ball games | 212 (53.8) |
| Gymnastics | 19 (4.8) |
| Track | 23 (5.8) |
| Swimming | 17 (4.3) |
| Fighting sports | 26 (6.6) |
| Others | 97 (24.6) |
| Participation in national or international competition, number (%). | 102 (25.9) |
| Weekly training duration (hours/week), mean±SD | 15.4±8.4 |
| Restriction of body weight, number (%) | 88 (22.3) |
| Stress fracture, number (%) | 66 (16.8) |
BMI, body mass index.