TABLE 3

Activity as a correlate of lung function, outliers excluded, associations for subjects with moderate physical activity (MPA), vigorous physical activity (VPA), moderate-to-vigorous physical activity (MVPA), forced expiratory volume in 1 s (FEV₁), forced vital capacity (FVC) and FEV₁/FVC all within 2 sd of the sex-specific mean, adjusted for age, sex, height, study centre, nutritional intervention, device weartime, body mass index, parental education, birthweight, exclusive breastfeeding, prenatal tobacco and tobacco smoke at home up to the age of 6 years

	FEV₁ mL		FVC mL		FEV₁/FVC %		FEF_25–75% 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	1.93 (−0.72–4.6)	0.15	2.05 (−0.80–4.9)	0.16	0.0040 (−0.033–0.041)	0.83	3.01 (−2.6–8.6)	0.29
VPA	1.97 (−1.7–5.7)	0.30	4.11 (−0.18–8.1)	0.041	−0.043 (−0.094–0.0090)	0.11	−2.15 (−9.9–5.6)	0.59
MVPA	−1.37 (−0.44–3.2)	0.14	1.94 (0.0041–3.9)	0.050	−0.0083 (−0.034–0.017)	0.52	0.879 (−2.9–4.7)	0.65
MVPA quintile^#		0.27		0.16		0.024		0.078
1^¶	0		0		0		0
2^¶	28.8 (−67–58)	0.89	91.4 (7.4–175)	0.033	−1.27 (−2.4–−0.18)	0.022	−127 (−291–36)	0.13
3^¶	42.6 (−50–107)	0.47	62.9 (−20–146)	0.14	−0.46 (−1.55–0.62)	0.40	9.34 (−153–172)	0.91
4^¶	−2.26 (−35–120)	0.28	62.4 (−22–147)	0.15	−1.53 (−2.63–−0.43)	0.0064	−135 (−301–30)	0.11
5^¶	88.4 (−1.7–179)	0.055	109 (13–206)	0.026	−0.14 (−1.40–1.12)	0.83	77.0 (−111–265)	0.42
Percentage of days with MVPA
>30 min	109 (7.4–210)	0.035	115 (6.4–224)	0.038	0.142 (−1.3–1.6)	0.84	139 (−74–352)	0.20
>45 min	104 (−11–219)	0.076	96.2 (−27–219)	0.13	0.483 (−1.1–2.1)	0.56	160 (−81–400)	0.19
>60 min	75.9 (−74–225)	0.32	132 (−28–292)	0.11	−1.026 (−3.1–1.1)	0.34	−12.0 (−325–301)	0.94
Any sport	−15.4 (−79–48)	0.64	10.1 (−58–78)	0.77	−0.600 (−1.5–0.30)	0.19	−50.0 (−183–83)	0.46
Any active transportation⁺	−3.10 (−55–49)	0.91	10.8 (−45–67)	0.71	−0.333 (−1.1–0.40)	0.37	−44.3 (−154–65)	0.43

Data presented in bold are statistically significant at p<0.05. 95% CI calculated using Wald's Chi-squared test. MPA, VPA and MVPA imputed for diarised nonwear of accelerometer due to sport. Accelerometric cutpoints were calculated using Freedson's algorithm [29, 33]. FEF_25–75%: forced expiratory flow at 25–75% of FVC. ^#: p-value for global null hypothesis (i.e. all quintiles equal), quintiles 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.