TABLE 1—
Preintervention Sample Characteristics for Population and Selected Evaluation Subsample Groups: Durham County, NC; July 1, 2009–December 31, 2010
| RCT Population vs Selected and Interviewed Evaluation Subsamples |
Interviewed Intervention vs Control Evaluation Subsamples |
||||
| Variable | RCT Population (n = 4777), Mean | Selected Evaluation Subsample (n = 664), Mean (P) | Interviewed Evaluation Subsamplea (n = 531), Mean (P) | Participating Intervention Subsampleb (n = 260), Mean | Participating Control Subsamplec (n = 271), Mean (P) |
| Low birth weight, % | 10.0 | 9.1 (.5) | 8.9 (.45) | 7.8 | 10.0 (.39) |
| Gestation < 37 wk, % | 8.2 | 6.7 (.17) | 6.3 (.12) | 4.7 | 7.8 (.15) |
| Any birth complications, % | 7.4 | 5.8 (.13) | 6.1 (.26) | 3.9 | 8.1 (.04) |
| Cesarean delivery, % | 30.6 | 31.6 (.59) | 31.8 (.56) | 32.3 | 31.4 (.82) |
| Multiple births, % | 2.1 | 2.1 (.92) | 2.6 (.37) | 3.5 | 1.9 (.25) |
| Adolescent mother, % | 9.4 | 9.2 (.86) | 9.4 (.99) | 9.2 | 9.6 (.89) |
| Medicaid/no insurance, % | 60.8 | 63.1 (.26) | 65.5 (.04) | 63.3 | 67.5 (.31) |
| Maternal age, y | 28.5 | 28.5 (.84) | 28.3 (.58) | 28.2 | 28.4 (.66) |
| Maternal race/ethnicity, % | |||||
| White, non-Hispanic | 29.7 | 29.2 (.8) | 26.6 (.13) | 28.5 | 24.7 (.33) |
| Black, non-Hispanic | 36.7 | 38.0 (.54) | 39.4 (.23) | 36.5 | 42.1 (.19) |
| Hispanic | 22.6 | 23.2 (.71) | 24.7 (.27) | 25.0 | 24.4 (.86) |
| Other | 11.1 | 9.6 (.27) | 9.4 (.25) | 10.0 | 9.9 (.65) |
| Infant female, % | 49.8 | 54.7 (.01) | 53.5 (.11) | 50.8 | 56.1 (.22) |
Note. RCT = randomized controlled trial. The selected evaluation and interviewed evaluation subsamples are compared with the RCT population and the participating control subsample is compared with the participating intervention subsample.
a
80.0% of the selected subsample participated.
b
81.3% of the selected subsample participated.
c
78.8% of the selected subsample participated.