TABLE 4.
Multivariable Cox Proportional Hazards Analysis of Predictors With SGA Status, Adjusted HRs
| SGA, HR (95% CI)a | |
|---|---|
| Race | |
| White | Reference |
| African American | 1.28 (0.75–2.17) |
| Other | 3.06 (1.13–8.25)b |
| Multirace | 0.31 (0.04–2.34) |
| Maternal education | |
| High school degree completed | Reference |
| No high school degree | 0.71 (0.42–1.19) |
| Daily contact with infant’s father | 0.69 (0.45–1.06) |
| Maternal age | |
| ≥18 y | Reference |
| <18 y | 1.37 (1.06–1.76)b |
| Maternal BMI | 1.00 (0.99–1.01) |
| Hypertension/preeclampsia | 2.05 (0.96–4.37) |
| Other drug use | 1.34 (0.52–3.47) |
| Percent below poverty level, by census tractc (%) | 1.00 (0.99–1.01) |
| Cigarette use | 1.52 (0.87–2.66) |
| Total number of home visits | |
| 1–3 prenatal home visits | Reference |
| 4–7 prenatal home visits | 1.18 (0.62–2.25) |
| 8–11 prenatal home visits | 0.99 (0.44–2.22) |
| ≥12 prenatal home visits | 0.32 (0.15–0.68)b |
a
Final covariates retained in the multivariable analysis of SGA were race, education, frequency of contact with the father, maternal age <18 y of age, maternal BMI, hypertension/preeclampsia, cigarette use, other drug use, and percent of residents living below poverty by census tract. Model also adjusts for clustering by individual home visiting agency by using robust variance estimators.
b
Values indicate statistical significance with P < .05.
c
Continuous variable representing percentage of census tract residents with incomes below the federal poverty level based on American Communities Survey data, 5-y combined estimate 2010.