Table 3. Birth Outcomes and Maternal Care Before and After Propensity Score Matching Among Non-Hispanic Black Women.
| Outcomes | Prevalence of events, No./total No.a | Between-group difference, percentage point (95% CI) | ||
|---|---|---|---|---|
| SB | Usual care | Before matchingb | After matchingc | |
| Preterm (<37 wk) | 84/609 (13.8) | 5591/33 304 (16.8) | −3.0 (−5.7 to −0.3) | −3.8 (−6.5 to −1.1) |
| Very preterm (<32 wk) | 9/609 (1.5) | 1113/33 304 (3.3) | −1.9 (−2.7 to −1.0) | −2.2 (−3.5 to −0.9) |
| Low birth weight (<2500 g) | 100/609 (16.4) | 4140/33 300 (12.4) | 4.0 (0.9-7.0) | 2.8 (0.1-5.5) |
| Very low birth weight (<1500 g) | 6/609 (1.0) | 701/33 300 (2.1) | −1.1 (−2.1 to −0.2) | −1.5 (−2.5 to −0.5) |
| Adequate care and plus | 439/593 (74.0) | 22 528/31 458 (71.6) | 2.4 (−1.4 to 6.3) | 3.1 (0.1-6.1) |
| Postpartum care (in 3 wk) | 306/609 (50.3) | 6496/33 304 (19.5) | 30.7 (26.5-35.0) | 25.2 (10.2-40.2) |
| Postpartum care (in 60 d) | 528/609 (86.7) | 19 077/33 304 (57.3) | 29.4 (26.4-32.4) | 23.9 (9.7-38.1) |
Abbreviation: SB, Strong Beginnings.
a
Observed prevalence before matching.
b
The difference between the control mean and the intervention mean may not equal the difference column before matching because of rounding.
c
The difference is based on kernel matching on baseline covariates with regression adjustments for gestational diabetes and gestational hypertension using cross-validated bandwidth selection and bootstrapped standard errors. False discovery rate–sharpened Q values and standard errors are calculated to report 95% CIs.