| Main sample (self-reported data,, N = 1653) |
| Baseline watching TV/video/DVD (hours/week) | 0.06(− 0.33,0.44) | 0.712 | 0.28(− 0.18,0.74) | 0.118 | − 0.63(− 1.34,0.07) | 0.021 |
| Baseline playing computer/games (hours/week) | 0.02(− 0.57,0.60) | 0.943 | − 0.12(− 0.81,0.57) | 0.651 | 0.42(− 0.67,1.50) | 0.318 |
| Baseline sports clubs (hours/week) | 1.07(− 0.23,2.36) | 0.034 | 0.96(− 0.54,2.46) | 0.098 | 1.03(− 1.54,3.60) | 0.299 |
| Change of watching TV/video/DVD (hours/week) | 0.11(− 0.28,0.49) | 0.468 | 0.36(−0.10,0.81) | 0.042 | −0.63(−1.35,0.08) | 0.022 |
| Change of playing computer/games (hours/week) | 0.09(−0.35,0.54) | 0.593 | 0.09(− 0.47,0.64) | 0.688 | 0.32(− 0.41,1.04) | 0.258 |
| Change of sports clubs (hours/week) | 1.28 (0.30,2.26) | 0.001 | 1.29 (0.10,2.48) | 0.005 | 1.04(−0.63,2.70) | 0.110 |
| Weight bearing sports |
| Moderate or high mechanical loads vs. No or low mechanical loads (reference) | −0.69(−4.99,3.61) | 0.678 | 0.32(− 4.76,5.41) | 0.870 | −3.13(−11.14,4.89) | 0.313 |
| Subsample (accelerometer data, N = 839) |
| Baseline sedentary time (hours/day) | 0.60(−1.77,2.96) | 0.516 | 0.99(−1.86,3.85) | 0.369 | −0.39(−4.65,3.86) | 0.811 |
| Baseline light physical activity (hours/day) | −0.81(−3.50,1.89) | 0.439 | −1.60(−4.93,1.73) | 0.214 | 0.16(−4.46,4.78) | 0.927 |
| Baseline moderate-to-vigorous physical activity (10 min/day) | 2.77 (1.50,4.05) | < 0.001 | 2.97 (1.53,4.42) | < 0.001 | 2.85(−0.12,5.81) | 0.013 |
| Change of sedentary time (hours/day) | −0.85(−2.58,0.88) | 0.205 | −1.19(−3.25,0.87) | 0.135 | 0.10(−3.09,3.29) | 0.935 |
| Change of light physical activity (hours/day) | −0.94(−3.03,1.16) | 0.249 | −1.45(−3.99,1.09) | 0.140 | 0.42(−3.26,4.10) | 0.768 |
| Change of moderate-to-vigorous physical activity (10 min/day) | 1.05(−0.09,2.18) | 0.018 | 0.89(−0.39,2.16) | 0.073 | 1.76(−0.88,4.40) | 0.084 |
