Characteristics of mothers and infants participating in the Nurture study (n=433)
| Infant characteristics | Mean (SD) |
| Birth weight for gestational age z score | −0.3 (1.0) |
| Age at 12 month home visit, days | 373.9 (23.6) |
| Weight-for-length z score at 12 months | 0.6 (1.0) |
| Any breast feeding, weeks | 17.6 (19.7) |
| Motor development composite score at 12 months | 97.9 (10.7) |
| Per cent (number) | |
| Gender, female | 50.6 (219) |
| Race | |
| Black | 64.7 (280) |
| White | 18.5 (80) |
| Other race/more than one race | 16.9 (73) |
| Ethnicity, Latino/a | 9.0 (37) |
| Weight-for-length z score at 12 months by WHO category | |
| Severely wasted (severely underweight) | _ |
| Wasted (underweight) | 0.5 (2) |
| Normal | 66.5 (288) |
| Possible risk of overweight | 24.7 (107) |
| Overweight | 6.7 (29) |
| Obese | 1.6 (7) |
| Age of rolling over | |
| 4 months and younger | 72.1 (312) |
| Older than 4 months | 27.9 (121) |
| Age of sitting up | |
| 5 months and younger | 44.3 (192) |
| 5–6 months | 33.0 (143) |
| Older than 6 months | 22.6 (98) |
| Age of crawling | |
| 6 months and younger | 19.9 (86) |
| 7–8 months | 40.4 (175) |
| Older than 8 months | 39.7 (172) |
| Age of walking | |
| 11 months and younger | 34.7 (150) |
| 12 months | 28.9 (125) |
| Older than 12 | 36.3 (157) |
| Maternal characteristics | Mean (SD) |
| Age, years | 28.1 (5.8) |
| Prepregnancy body mass index, kg/m2 | 30.6 (9.3) |
| Per cent (frequency) | |
| Race | |
| Black | 67.4 (292) |
| White | 22.2 (96) |
| Other race/more than one race | 10.4 (45) |
| Ethnicity, Latina | 5.6 (24) |
| Education | |
| ≤High school graduate | 44.1 (191) |
| Some college, college graduate or graduate degree | 55.9 (242) |
| Marital status | |
| Married or living with partner | 59.1 (253) |
| Never married, divorced, separated, other | 40.9 (175) |
| Household Characteristics | Per cent (frequency) |
| Annual household income | |
| < $20 000 | 38.3 (166) |
| ≥ $20 000 | 61.7 (267) |