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Demographic data: size of groups by grade level, sex and sport-focused class.
| −Mask | +Mask | p | |
|---|---|---|---|
| Total, n (%) | 68 | 65 | |
| Girls, n (%) | 42 (61.8) | 30 (46.2) | 0.07 |
| Grade 5, n (%) | 23 (33.8) | 37 (56.9) | 0.07 |
| Grade 6, n (%) | 28 (41.2) | 15 (23.1) | 0.05 |
| Grade 7, n (%) | 17 (25.0) | 13 (20.0) | 0.53 |
| Children from sport-focused class n (%) | 33 (48.5) | 34 (52.3) | 0.66 |
n, number; p, group-specific level of significance; significant at p < 0.05.
