Table 1 Participant characteristics
Girls (n = 18,810)a | Boys (n = 10,990)a | |
---|---|---|
Age (years) | 11.8 (10.6 – 13.8) | 11.4 (9.6 – 12.0) |
Body-height (cm) | 152.4 (141.9 – 159.8) | 145.7 (135.5 – 155.6) |
Body-weight (kg) | 45.6 (35 – 55.7) | 38.0 (30.2 – 49.8) |
Wear-time (h/day)b | 13.2 (1.3) | 13.1 (1.3) |
Counts/min | 453 (348 – 586) | 620 (491 – 768) |