Teun Remmers

Appendix 3 | 235 Supplementary Digital Content 4: Relationship between weather elements and physical activity, and interactions between weather elements ( n =4599 days, n =307 children) Moderate PA std. B (95%CI) Vigorous PA std. B (95% CI) -2 restricted log likelihood = 10939 -2 restricted log likelihood = 10727 Rainfall (0.01–7.8 mm per day versus no rainfall) Rainfall (7.9–46.0 mm per day versus no rainfall) 0.077 (0.020 to 0.134) 0.051 (-0.006 to 0.108) -0.064 (-0.149 to 0.022) -0.009 (-0.094 to 0.077) Humidity -0.045 (-0.083 to -0.007) -0.057 (-0.095 to -0.020) Day length -0.112 (-0.240 to 0.017) -0.154 (-0.281 to -0.028) Temperature -0.077 (-0.345 to 0.191) -0.259 (-0.524 to 0.007) Temperature squared -0.003 (-0.280 to 0.274) 0.074 (-0.201 to 0.349) Solar Radiation exposure 0.155 (0.107 to 0.204) 0.148 (0.100 to 0.196) Day type (weekday versus weekend day) 0.438 (0.380 to 0.495) 0.330 (0.274 to 0.386) Gender (boys versus girls) 0.522 (0.410 to 0.633) 0.531 (0.396 to 0.666) Age in years -0.109 (-0.168 to -0.051) -0.049 (-0.120 to 0.022) Body Mass Index * -0.102 (-0.163 to -0.040) Solar * Temperature -0.390 (-0.602 to -0.177) -0.492 (-0.703 to -0.280) Solar * Temperature squared 0.255 (0.044 to 0.467) 0.372 (0.162 to 0.582) Table shows fixed effects (as standardized regression coefficients (std. B) with 95% confidence intervals (CI) from linear mixed models, with a random intercept for each child, and a repeated term for each child across each repeated observation, with autoregressive covariance structure. *: BMI was excluded from this model as its initial main effect was not statistically significant. Bolded text indicates significant at p<0.05.