Comparison of Study Sample Versus County Data
| Variable | Our Sample | County Data* |
|---|---|---|
| Maternal age (years [SD]) | 30.3 (5.6) | 37.4 |
| Ethnicity (% [n]) | ||
| Black | 30.0 (65) | 32.8 (24,678) |
| Non-Hispanic white | 70.0 (152) | 67.2 (50,458) |
| Maternal education (% [n]) | ||
| <College degree | 53.0 (115) | 78.0 (3,611)† |
| ≥College degree | 47.0 (102) | 22.0 (1,039)† |
| Married (% [n]) | 77.0 (167) | 60.7 (2,824)† |
| Work (hours/week [SD]) | 39.6 (5.5) | 50.3‡ |
* US 2000 Census; Women 15 to 50 years of age who had a birth during the past 12 months, Forsyth County, NC.21
† Proportions differ based on results of a Z test for difference in 2 proportions with a 95% confidence value.
‡ Percentage of mothers who worked ≥35 hours per week.