FEV1 mL | FVC mL | FEV1/FVC % | FEF25–75% mL·s−1 | |||||
Parameter estimate (95% CI) | p-value | Parameter estimate (95% CI) | p-value | Parameter estimate (95% CI) | p-value | Parameter estimate (95% CI) | p-value | |
Daily mean minutes | ||||||||
MPA | 1.009 (−1.1–3.1) | 0.34 | 1.343 (−0.91–3.6) | 0.24 | −0.0048 (−0.034–0.024) | 0.75 | 1.58 (−2.6–5.8) | 0.46 |
VPA | 0.979 (−1.6–3.6) | 0.46 | 2.636 (−0.17–5.4) | 0.066 | −0.0344 (−0.070–0.002) | 0.060 | −0.439 (−5.7–4.8) | 0.87 |
MVPA | 0.700 (−0.66–2.1) | 0.31 | 1.296 (−0.18–2.7) | 0.084 | −0.0114 (−0.030–0.007) | 0.23 | 0.554 (−2.2–3.3) | 0.69 |
MVPA quintile# | 0.22 | 0.21 | 0.022 | 0.050 | ||||
1¶ | 0 | 0 | 0 | 0 | ||||
2¶ | −5.52 (−89–78) | 0.90 | 58.1 (−33–149) | 0.21 | −1.45 (−2.6–0.29) | 0.014 | −172 (−342–−1.8) | 0.048 |
3¶ | 43.4 (−40–127) | 0.31 | 63.0 (−28–154) | 0.18 | −0.46 (−1.6–0.70) | 0.44 | 10.1 (−160–181) | 0.91 |
4¶ | −19.0 (−103–65) | 0.66 | 51.1 (−40–142) | 0.27 | 0.0033 | −155 (−326–14.7) | 0.073 | |
5¶ | 67.0 (−18–151) | 0.12 | 113 (21–205) | 0.016 | −0.86 (−2.0–0.31) | 0.15 | 16.1 (−156–188) | 0.85 |
Percentage of days with MVPA | ||||||||
>30 min | 96.1 (−2.5–195) | 0.056 | 113 (6.4–221) | 0.038 | −0.331 (−1.7–1.0) | 0.64 | 117 (−84–318) | 0.26 |
>45 min | 72.3 (−33–177) | 0.18 | 95.5 (−18–209) | 0.10 | −0.428 (−1.9–1.0) | 0.56 | 106 (109–−107) | 0.33 |
>60 min | 48.0 (−77–172) | 0.45 | 98.7 (−36–234) | 0.15 | −1.200 (−2.9–0.53) | 0.17 | 23.6 (−230–277) | 0.86 |
Any sport | 34.3 (−31–100) | 0.30 | 46.6 (−25–118) | 0.20 | −0.189 (−1.1–0.72) | 0.68 | 22.5 (−111–156) | 0.74 |
Any active transportation+ | 23.9 (−32–76) | 0.39 | 40.0 (−21–95) | 0.18 | −0.189 (−0.95–0.54) | 0.68 | 11.9 (−99–120) | 0.83 |
Data presented in bold are statistically significant at p<0.05. 95% CI was calculated using Wald's Chi-squared test. Moderate physical activity (MPA), vigorous physical activity (VPA) and moderate-to-vigorous physical activity (MVPA) imputed for diarised nonwear of accelerometer due to sport. Accelerometric cutpoints were calculated using Freedson's algorithm [29, 33]. FEV1: forced expiratory volume in 1 s; FVC: forced vital capacity; FEF25–75%: forced expiratory flow at 25–75% of FVC. #: p-value for global null hypothesis (i.e. all quintiles equal), quintiles were stratified by sex; ¶: p-value and parameter estimate for each quintile compared with the lowest (reference); +: defined as commuting to school by walking or cycling at least once during accelerometry.