Table 3.
Associations between Mutually-Adjusted Trimester-specific Ta, tLBW and SGA in Singleton Term Infants, Southern Israel, 2004–2013
| Outcome | Ta Exposure Category | 1st trimester | 2nd trimester | 3rd trimester |
|---|---|---|---|---|
| tLBW | Lowest quartilea | 0.92 (0.75–1.13) | 0.94 (0.74–1.18) | 1.17 (0.92–1.49) |
| Intermediate quartiles | Reference | Reference | Reference | |
| Highest quartilea | 1.03 (0.82–1.31) | 1.14 (0.92–1.41) | 1.02 (0.92–1.12) | |
| SGA | Lowest quartilea | 1.02 (0.92–1.12) | 0.95 (0.85–1.06) | 1.17 (1.05–1.31) |
| Intermediate quartiles | Reference | Reference | Reference | |
| Highest quartilea | 0.82 (0.73–0.92) | 0.94 (0.85–1.04) | 0.95 (0.85–1.05) |
aExposure quartiles were calculated for each trimester separately. 1st trimester: lowest: < 14.9, Highest: > 24.1. 2nd and 3rd trimesters: lowest: < 15.6, Highest: > 24.7. (All values are in centigrade)
Ta Average ambient air temperature, tLBW term low birth weight, SGA small for gestational age. Trimester-specific exposures were adjusted for calendar month, year of birth, particulate matter < 2.5 μm (PM2.5), maternal age at birth, gravidity, parity, ethnicity, newborn sex, census-level poverty index and population density, and mutually adjusted for each other