The joint effect of NDVI−100 m buffer and distance to a city park on the clinically diagnosed asthma in 4−6-year-old children
| One hundred metres buffer NDVI and distance to a city park (m) | Asthma cases No (%) | Unadjusted OR | Adjusted* OR (95% CI) |
|---|---|---|---|
| NDVI-100≤median and to city park >1000 | 9 (6.5) | Reference | Reference |
| NDVI-100≤median and to city park ≤1000 | 41 (6.7) | 1.04 (0.47 to 2.37) | 1.15 (0.50 to 2.62) |
| NDVI-100>median and to city park >1000 | 12 (9.0) | 1.42 (0.54 to 3.81) | 1.47 (0.56 to 3.87) |
| NDVI-100>median and to city park ≤1000 | 50 (8.2) | 1.30 (0.60 to 2.91) | 1.27 (0.56 to 2.86) |
*Adjusted for: maternal smoking during pregnancy, antibiotic use during the first year of life, parental asthma, maternal education, mother's age at childbirth, keeping a cat during the past 12 months, breastfeeding, living in a flat, PM2.5 and NO2.
NDVI, Normalised Difference Vegetation Index.