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. Author manuscript; available in PMC: 2021 Sep 1.
Published in final edited form as: Environ Int. 2020 Jun 5;142:105804. doi: 10.1016/j.envint.2020.105804

Figure 1. Hazard ratios (HRs) of PTB associated with average green space exposure during the entire pregnancy.

Figure 1.

HRs and 95% confidence intervals (CIs) were calculated for per interquartile range (IQR) increment for green space (NDVI); PTB, preterm birth; MPTB, moderately PTB; VPTB, very PTB.

All models adjusted for maternal age, race/ethnicity, educational level, and median household income at census block-group level; maternal address ZIP code was fitted as a random effect.