Skip to main content
. 2020 Jul 15;128(7):077003. doi: 10.1289/EHP6394

Figure 2.

Figure 2A and 2B are graphs, plotting OR plus or minus 95 percent CI, ranging from 0.0 to 2.0 in increments of 0.5 (y-axis) across preterm birth and small for gestational age (x-axis) for low flaring, high flaring, not adjusted for number of wells, and adjusted for number of wells. Figure 2C and 2D are graphs, plotting Mean difference plus or minus 95 percent CI, ranging from negative 4 to 2 in increments of 2 and negative 90 to 30 in increments of 30 (y-axis) across gestational age (days) and term birthweight (grams; x-axis) for low flaring, high flaring, not adjusted for number of wells, and adjusted for number of wells.

Estimated associations between the number of flares within 5km of maternal residence and (A) the odds of preterm birth, (B) the odds of small-for-gestational age birth, (C) gestational age, and (D) term birthweight, Eagle Ford Shale, Texas, 2012–2015 (N=23,158). Full numeric data for models that are unadjusted (Model 1) and adjusted (Model 2) for the number of oil and gas wells within 5km are provided in Tables S2 and S3. Figures show effect estimate and 95% CIs comparing infants with prenatal exposure to a low (1–9) and high (10–562) number of nightly flare events within 5km of the maternal residence to unexposed infants. All estimates are adjusted for maternal age, race/ethnicity, nativity, education, prepregnancy BMI, smoking, insurance, parity, high-risk pregnancy, infant sex, prenatal care, year of birth, and season of birth. Models of term birthweight additionally controlled for gestational age. Red lines indicate the null. Note: BMI, body mass index; CI, confidence interval; OR, odds ratio.