Table 2.
Body fat mass according to sedentary and MVPA levels
| Boys | Girls | |||||||
|---|---|---|---|---|---|---|---|---|
|
| ||||||||
| Age 8 | Age 11 | Age 13 | Age 15 | Age 8 | Age 11 | Age 13 | Age 15 | |
|
| ||||||||
| n=243 | n=219 | n=199 | n=133 | n=252 | n=233 | n=202 | n=134 | |
|
| ||||||||
| Mean (95% CI) | Mean (95% CI) | |||||||
| Body fat mass (kg) by sedentary time level† | ||||||||
| Low | 7.1 (6.3, 7.9) | 11.4 (9.6, 13.1) | 12.8 (10.9, 14.6) | 14.8 (11.7, 18.0) | 8.0 (7.3, 8.8) | 12.6 (10.7, 14.4) | 15.8 (13.7, 17.9) | 17.6 (14.8, 20.4) |
| Medium | 7.9 (6.8, 8.9) | 10.7 (9.3, 12.2) | 13.8 (11.3, 16.3) | 12.9 (10.3, 15.5) | 9.0 (7.8, 10.2) | 13.3 (11.8, 14.8) | 13.9 (12.2, 15.6) | 17.1 (14.4, 19.8) |
| High | 9.4 (8.1, 10.7) | 13.8 (11.8, 15.7) | 14.8 (12.6, 17.1) | 12.9 (10.5, 15.2) | 9.3 (8.3, 10.3) | 12.3 (10.8, 13.7) | 16.1 (14.0, 18.2) | 18.0 (15.4, 20.6) |
| Body fat mass (kg) by MVPA time level† | ||||||||
| Low | 9.9 (8.5, 11.3) | 13.8 (11.8, 15.8) | 16.6 (13.9, 19.2) | 14.7 (11.5, 17.8) | 10.4 (9.1, 11.6) | 14.4 (12.5, 16.3) | 16.5 (14.6, 18.5) | 19.2 (16.3, 22.1) |
| Medium | 7.9 (6.9, 8.8) | 12.6 (10.7, 14.5) | 13.2 (11.3, 15.2) | 13.3 (11.0, 15.5) | 8.4 (7.6, 9.3) | 12.6 (11.2, 14.1) | 16.0 (13.8, 18.2) | 16.9 (14.4, 19.4) |
| High | 6.7 (5.9, 7.4) | 9.4 (8.3, 10.5) | 11.7 (9.9, 13.4) | 12.7 (9.9, 15.4) | 7.5 (6.8, 8.2) | 11.1 (9.9, 12.4) | 13.2 (11.6, 14.9) | 16.6 (14.0, 19.3) |
BMI, body mass index; CI, confidence interval; MVPA, moderate- to vigorous-intensity physical activity.
†
Sedentary time and MVPA time were categorized by gender- and wave-specific tertile cut-points.