Table 3.
Associations between predictors and fitness analysed with linear regression models controlled for BMI, and wear time, stratified by gender.
| Model | Girls | Boys | ||||
|---|---|---|---|---|---|---|
| n | β | 95% CI | n | β | 95% CI | |
| 1. Physical activity | 482 | 346 | ||||
| 1.1 MVPA whole week | 0.074 | 0.038, 0.110 | 0.069 | 0.029, 0.108 | ||
| 1.2 SED whole week | −0.039 | −0.057, 0.022 | −0.030 | −0.046, −0.014 | ||
| 1.3 SED:MVPA ratio | −0.473 | −0.699, −0.248 | −0.407 | −0.638, −0.175 | ||
| 1.4 Light PA whole week | 0.043 | 0.020, 0.066 | 0.035 | 0.013, 0.057 | ||
| 1.5 Reached the PA recommendations | 3.313 | 1.962, 4.664 | 1.874 | 0.262, 3.486 | ||
| 2. Organised sports | ||||||
| 2.1 Participated in organised sports | 461 | 2.269 | 0.853, 3.686 | 341 | 2.870 | 1.141, 4.599 |
| 3. Rate of participation (per week) | ||||||
| Do not participate at all | REF | REF | ||||
| 1–2 times | 0.486 | −1.197, 2.170 | 1.635 | −0.763, 4.032 | ||
| 3–4 times | 2.937 | 1.302, 4.572 | 3.120 | 1.242, 5.154 | ||
| ≥5 times or more | 5.188 | 3.262, 7.115 | 3.615 | 1.099, 6.130 | ||
| 4. Screen time weekdays | 458 | 428 | ||||
| ≤2 h | REF | REF | ||||
| 3–4 h | −1.824 | −3.209, −0.440 | −1.579 | −3.356, 0.198 | ||
| ≥5 h | −2.315 | −3.922, −0.708 | −2.821 | −5.140, −0.502 | ||
| 5. Screen time weekend | 479 | 341 | ||||
| ≤2 h | REF | REF | ||||
| 3–4 h | 0.582 | −1.543, 2.708 | 1.308 | −0.836, 3.452 | ||
| ≥5 h | −1.266 | −3.362, 0.831 | −1.138 | −3.238, 0.963 | ||
| 6. Body composition | 569 | 448 | ||||
| Body fat (%) | −0.520 | −0.671, −0.369 | −0.714 | −0.887, −0.541 | ||
| 7. Puberty | 528 | 421 | ||||
| Tanner | −0.621 | −1.349, 0.108 | 2.613 | 1.860, 3.366 | ||
CI are in bold to indicate significance (p < 0.05). Model 2, 3, 4 and 5 are also adjusted for MVPA. MVPA moderate-to-vigorous physical activity, PA physical activity, SED sedentary time.