Table 3. Estimated Probability of Preterm Birth and Infant Mortality Rate Among Expectant Mothers Covered by Medicaid Who Did and Did Not Receive WIC Benefits During Pregnancya .
| Outcome | Percentage Estimate (95% CI) | |||
|---|---|---|---|---|
| Expectant Mothers Covered by Medicaid | Absolute Risk Reduction | Relative Risk Reduction | ||
| Received WIC Benefits During Pregnancy | Did Not Receive WIC Benefits During Pregnancy | |||
| Outcome 1: gestational age, % | ||||
| Extremely preterm | 0.32 (0.30-0.33) |
0.37 (0.36-0.39) |
0.06 (0.05-0.06) |
18.40 (17.90-18.93) |
| Very preterm | 0.58 (0.56-0.59) |
0.68 (0.66-0.70) |
0.10 (0.10-0.11) |
18.21 (17.71-18.72) |
| Moderate-to-late preterm | 5.47 (5.43-5.52) |
6.40 (6.35-6.45) |
0.93 (0.90-0.95) |
16.90 (16.45-17.39) |
| Outcome 2: infant mortality rate, deaths per 1000 live births | ||||
| Extremely preterm | 220.17 (212.35-227.30) |
251.12 (243.25-259.22) |
30.96 (27.44-34.39) |
14.07 (12.36-15.73) |
| Very preterm | 22.65 (21.47-23.77) |
26.78 (25.38-28.15) |
4.14 (3.64-4.63) |
18.27 (16.09-20.45) |
| Moderate-to-late preterm | 5.98 (5.72-6.26) |
7.09 (6.79-7.44) |
1.12 (0.99-1.24) |
18.66 (16.59-20.77) |
Abbreviation: WIC, Women, Infants, and Children benefits.
a
Characteristics of the subpopulation of expectant mothers covered by Medicaid who did or did not receive WIC benefits during pregnancy include the following: non-Hispanic white women, aged 25 to 29 years, with 2017 birth year, with at least some college education, married, primigravid and nulliparous, received prenatal care, and no cigarette smoking before or during pregnancy.