Residential greenness in different trimesters and the risk
of asthma based on birth seasons
In the trimester-specific analysis of four birth seasons, a significant
association between increased cumNDVI during pregnancy and the risk of
asthma was detected particularly for exposure in the third trimester
among children who were born in the spring, with an aHR of 1.57 (95%
CI: 1.23, 2.01) for asthma by 6 years of age, an aHR of 1.31 (95% CI:
1.07, 1.60) for asthma by 12 years, and an aHR of 1.22 (95% CI: 1.01,
1.46) for asthma by 27 years of age per 1 increase in NDVI, suggesting a
significant effect related to increased greenness in the spring season
(Table S4). However, the results should be interpreted with caution,
because they are based on a rather small number of individuals in each
group.