Table 1.
Means for intervention and control conditions
| Control N = 71 |
Intervention N = 76 |
|||
|---|---|---|---|---|
| Mean | (SD)/% | Mean | (SD)/% | |
| Pre-intervention variables | ||||
| Marital status (0 = non-married; 1 = married) | 0.86 | (0.35) | 0.84 | (0.37) |
| Mother education (highest grade completed) | 15.18 | (1.92) | 14.96 | (1.77) |
| Maternal age, pretest (years) | 27.91 | (5.29) | 28.60 | (4.65) |
| Child sex (0 = female; 1 = male) | 0.58 | (0.50) | 0.56 | (0.50) |
| Mother’s pre-pregnancy body mass index (kg/m2) | 24.70 | (5.41) | 25.01 | (5.12) |
| Mother’s self-rated health (scale: 1 = poor; 4 = excellent) | 3.31 | (0.59) | 3.46 | (0.50) |
| Mother’s tobacco use (# of times, prior 30 days) | 0.50 | (2.02) | 0.45 | (2.06) |
| Mother’s drug use (# of times, prior 5 years) | 0.99 | (2.70) | 0.89 | (2.54) |
| Mother’s lifetime history of alcohol problems (# of problems) | 1.46 | (1.80) | 1.81 | (1.28) |
| Maternal cortisol measures at pre-intervention | ||||
| Raw cortisol (µg/dL) | 0.16 | (0.10) | 0.16 | (0.11) |
| Residualized cortisol (see text) | −0.02 | (0.72) | −0.07 | (0.70) |
| Time of day of cortisol collection (24 h) | 18.04 | (2.19) | 17.85 | (2.43) |
| Number of weeks gestation at collection | 22.75 | (5.31) | 22.22 | (5.46) |
| Pregnancy-related outcomes | ||||
| Birth weight (kg s) | 3.35 | (0.64) | 3.19 | (0.66) |
| Gestational age (weeks) | 39.04 | (2.06) | 39.07 | (2.75) |
| Cesarean section (1 = yes)a | 0.40 | 40 % | 0.21 | 21 % |
| Pregnancy complications (1 = one or more complications) | 0.36 | 36 % | 0.25 | 25 % |
| Maternity length of stay (days) | 3.36 | (2.50) | 3.11 | (2.09) |
| Newborn length of stay (days) | 2.89 | (1.17) | 2.67 | (1.04) |
a
Significant group difference based on t test (p < 0.05)