Teun Remmers

Playability of school environments and afterschool PA | 111 Playability and after-school Physical Activity by distance-categories Only if children lived within 400 meters from their school, after school LPA was positively associated with playability (Table 3). When children lived beyond 400 meters from their school, associations attenuated and were no longer statistically significant. For after school MVPA, the attenuating influence of distance from home to school was detectable when exceeding the 800m crow-fly or network-distance. Table 2: Associations between playability and after-school physical activity intensities by time of the day % Light PA % MVPA Time of the day End of the school day – 16:00 hours ( n= 539) 0.043 (0.026 to 0.060) 0.029 (0.008 to 0.048) 16:00 – 18:00 hours ( n= 586) 0.018 (0.002 to 0.034) 0.028 (0.012 to 0.045) 18:00 – 20:00 hours ( n= 585) 0.001 (-0.015 to 0.018) -0.007 (-0.024 to 0.010) 20:00 – 22:00 hours ( n= 326) 0.052 (0.032 to 0.072) 0.016 (-0.005 to 0.038) Standardized beta’s (with 95% confidence intervals in brackets) from linear mixed model analyses with a random intercept and slope over time (one-hour periods), nested within the dates at which measurement commenced. Results were adjusted for age, gender, average temperature, average duration of rainfall, and average duration of sunshine per day. Bold number represents statistical significance at p<0.05. To examine the interactive influence of time and distance, analyses of time-periods were stratified for distance-categories from home to school (Table 4). The results of these stratified analyses were generally in line with the results described above. Regarding LPA, the attenuating influence of time-periods and distance-categories was comparable to the results Table 2 and 3, except for the distance greater than 1600 meters and time-period after 20:00 hours. Regarding MVPA, attenuating influences of time and distance were also comparable with Table 2 and 3, but in some instances revealed deeper insights. For example, ASPA after 16:00 hours (i.e. second time-period) was only associated with playability in children that lived within 400 meters from their school. When these analyses were repeated using network-distance, similar attenuating influences of time and distance were found (Table S1 in publication).