Table 1.
Demographics and descriptive statistics for observed study variables
| Variable | N | Mean or % | SD | Minimum | Maximum |
|---|---|---|---|---|---|
| Race (% African American) | 977 | 44% | |||
| Sex (% male) | 977 | 49% | |||
| State of residence (% NC) | 977 | 59% | |||
| Child age at 36 months (in years) | 977 | 3.08 | 0.14 | 2.87 | 3.94 |
| Scarcity-adversity (6 months) | 961 | .007 | 0.63 | −2.51 | 2.17 |
| Income-to-needs ratio (6 months) | 876 | 1.90 | 1.67 | 0.00 | 16.47 |
| Economic strain (6 months) | 951 | 11.57 | 3.66 | 1.00 | 22.00 |
| Maternal education (6 months) | 961 | 14.48 | 2.82 | 6.00 | 22.00 |
| Consistent partner (6 months) | 961 | 62% | |||
| Neighborhood safety (6 months) | 961 | 2.99 | 0.58 | 1.00 | 4.00 |
| Household density (6 months) | 961 | 0.88 | 0.36 | 0.36 | 3.33 |
| Child CORT (6 months, ln μg/dL) | 899 | −1.88 | 0.70 | −3.91 | 0.22 |
| Child CORT (15 months, ln μg/dL) | 828 | −1.99 | 0.75 | −4.27 | 0.48 |
| Child CORT (24 months, ln μg/dL) | 818 | −2.06 | 0.73 | −4.27 | 0.25 |
| Maternal CORT (6 months, ln μg/dL) | 920 | −1.78 | 0.67 | −3.61 | 0.44 |
| Maternal CORT (15 months, ln μg/dL) | 773 | −2.23 | 0.69 | −4.71 | 0.60 |
| Maternal CORT (24 months, ln μg/dL) | 752 | −2.08 | 0.70 | −3.99 | 0.62 |
| Time of day for CORT Collection (6 months, hh:mm) | 950 | 13:31 | 2:53 | 8:12 | 20:05 |
| Time of day for CORT Collection (15 months, hh:mm) | 953 | 13:57 | 2:55 | 8:50 | 21:03 |
| Time of day for CORT collection (24 months, hh:mm) | 932 | 13:52 | 3:13 | 8:20 | 20:46 |
| Negative parenting (6 months) | 918 | 2.42 | 0.77 | 1.00 | 5.00 |
| Negative parenting (15 months) | 921 | 2.27 | 0.70 | 1.00 | 5.00 |
| Negative parenting (24 months) | 909 | 2.43 | 0.87 | 1.00 | 5.00 |
| Child persistence (36 months) | 977 | 3.29 | 0.89 | 1.00 | 5.00 |
| Child enthusiasm (36 months) | 977 | 3.13 | 0.87 | 1.00 | 5.00 |
| Child compliance (36 months) | 977 | 3.90 | 0.90 | 1.00 | 5.00 |