Fig. 2. Model-specific odds ratios and 95% confidence intervals of LBW/TLBW for per 0.1-unit increase in vegetation indices within multiple buffers.

Multi-model associations of LBW (a) and TLBW (b) with NDVI or EVI. Model 1 was a crude model without covariate adjustment; Model 2 was adjusted for maternal age, infant sex, and gestational age; Model 3 was adjusted for covariates in maternal demographic characteristics and fetal variables; Model 4 (fully-adjusted model) was adjusted for covariates in maternal demographic characteristics, fetal variables, and environmental factors. LBW low birth weight, TLBW term low birth weight, NDVI normalized difference vegetation index, EVI enhanced vegetation index, OR odds ratio.