TABLE 2.
(1) | (2) | (3) | (4) | |
---|---|---|---|---|
Outcome | Preterm birth | Gestational length | Birth weight | Low birth weight |
Z‐score of average case filing over pregnancy | 1.09% points | −0.05 wk | −11.96 g | 0.72% points |
(0.05‐2.13) | (−0.13‐0.03) | (−28.75‐4.82) | (0.02‐1.43) | |
Average value of the outcome in the analytic sample | 8.18% | 38.59 wk | 3298.56 g | 6.57% |
Average value of the outcome in the United States over the study period | 9.81% | 38.49 wk | 3269.06 g | 8.07% |
Observations | 7 324 812 | 7 324 812 | 7 324 812 | 7 324 812 |
95% confidence intervals in parentheses constructed using clustered standard errors at the county level. All results presented in the table are pooled estimates from ordinary least‐squares regressions estimated on five imputed datasets. All models controlled for county of residence fixed effects, state‐of‐residence‐year‐and‐month fixed effects, and a linear county‐specific time trend. All models also controlled for mother's age, a quadratic age term, mother's race, mother's highest level of education, parity, child's sex, method of payment for delivery, urban‐rural classification of county of residence, county of residence's annual poverty rate, and county of residence's unstandardized, monthly unemployment rate.