Table 1.
Sample characteristics
| Variable | Total (n = 450) % (n) |
|---|---|
| Age (mean [SD]) | 30.9 (5.6) |
| 18–24 | 14.2 (64) |
| 25–34 | 55.8 (251) |
| 35+ | 30.0 (135) |
| Race | |
| White/other | 54.9 (247) |
| Black | 45.1 (203) |
| Education | |
| High school graduate or less | 45.1 (203) |
| College degree | 33.3 (150) |
| Postgraduate degree | 21.6 (97) |
| Marital status | |
| Single | 31.3 (141) |
| Married | 68.7 (309) |
| Plan to work outside home (at 6 mo pp) | |
| Not work outside the home | 19.2 (86) |
| Parttime | 18.0 (81) |
| Fulltime | 62.8 (282) |
| Parity | |
| 1 | 41.1 (185) |
| 2 | 36.0 (162) |
| 3+ | 22.9 (103) |
| Current smoking | |
| Yes | 5.8 (26) |
| Postpartum depression | |
| Yes | 8.7 (39) |
| Delivery type | |
| Vaginal | 61.9 (274) |
| Cesarean section | 38.2 (169) |
| Gestational age (weeks; mean [SD]) | 38.4 (2.1) |
| Preterm birth (<37 weeks) | 11.6 (52) |
| Gestational weight gain (kg; mean [SD])[24] | 14.9 (8.7) |
| Under IOM recommendations | 19.6 (88) |
| Within IOM recommendations | 20.8 (93) |
| Above IOM recommendations | 59.6 (267) |
| Body mass index (kg/m2; mean [SD]) [23] | 33.0 (6.4) |
| 25–29.9 (overweight) | 40.0 (180) |
| 30–34.9 (obese class I) | 31.3 (141) |
| 35–39.9 (obese class II) | 15.6 (70) |
| 40+ (obese class III) | 13.1 (59) |
| Initiation of breastfeeding | |
| Never breastfed | 31.1 (140) |
| Breastfed | 68.9 (310) |
| Duration of breastfeeding (months [1–12]; mean [SD])a |
7.2 (4.0) |
| Lactation score (intensity [1–24]; mean [SD])a |
12.4 (7.8) |
a
Among breastfeeders only; measured at 12 month follow-up