Table 2.
Weekly average of green space exposure and air pollution for the 3 buffer zones, as well as BMI and physical activity at the 250-meter buffer zone, in the 5-week follow-up period.
| Variable | Value, mean (SD) | |||||||||||
|
|
Overall | Week 1 | Week 2 | Week 3 | Week 4 | Week 5 |
||||||
| NDVIa | ||||||||||||
|
|
100-m buffer zone | –0.54 (0.33) | –0.67 (0.35) | –0.53 (0.34) | –0.53 (0.29) | –0.46 (0.35) | –0.51 (0.33) | |||||
|
|
250-m buffer zone | –0.61 (0.22) | –0.70 (0.29) | –0.61 (0.19) | –0.59 (0.17) | –0.57 (0.21) | –0.61 (0.21) | |||||
|
|
500-m buffer zone | –0.61 (0.22) | –0.70 (0.29) | –0.60 (0.19) | –0.59 (0.17) | –0.57 (0.21) | –0.60 (0.21) | |||||
| PM2.5b (µg/m3) | ||||||||||||
|
|
100-m buffer zone | 25.57 (1.28) | 25.60 (1.62) | 25.68 (1.20) | 25.46 (1.22) | 25.67 (1.42) | 25.46 (1.07) | |||||
|
|
250-m buffer zone | 29.26 (1.12) | 29.07 (1.47) | 29.25 (1.00) | 29.17 (1.05) | 29.44 (1.07) | 29.35 (1.02) | |||||
|
|
500-m buffer zone | 29.25 (1.01) | 29.04 (1.44) | 29.25 (0.82) | 29.18 (0.95) | 29.41 (0.89) | 29.33 (0.93) | |||||
| NO2c (µg/m3) | ||||||||||||
|
|
100-m buffer zone | 23.46 (12.89) | 23.58 (14.84) | 23.48 (13.26) | 23.63 (12.38) | 22.78 (11.82) | 23.84 (13.36) | |||||
|
|
250-m buffer zone | 39.73 (5.30) | 40.43 (8.19) | 39.78 (4.00) | 39.44 (4.64) | 39.08 (4.19) | 40.00 (5.20) | |||||
|
|
500-m buffer zone | 39.78 (5.21) | 40.47 (7.81) | 39.83 (4.09) | 39.52 (4.56) | 39.12 (4.34) | 40.03 (5.09) | |||||
| BMI (kg/m2) | 22.83 (3.26) | 22.85 (3.30) | 22.78 (3.35) | 22.89 (3.30) | 22.91 (3.29) | 22.73 (3.25) | ||||||
| MVPAd (minutes) | 177.61 (76.64 | 180.77 (79.75) | 184.02 (79.01) | 176.64 (77.24) | 172.96 (77.39) | 173.91 (73.37) | ||||||
aNDVI: normalized difference vegetation index.
bPM2.5: particulate matter with a diameter less than 2.5 μm.
cNO2: nitrogen dioxide.
dMVPA: moderate to vigorous physical activity.