Table I.
Demographic and clinical characteristics of 1000 postpartum women. Unless otherwise indicated, values are number (%).
| Characteristic | Total Sample (N = 1000) | RLS Surrogate Group (n = 108) | No-RLS Surrogate Group (n = 892) |
|---|---|---|---|
| Age, mean (SD), y | 29.0 (6.1) | 29.3 (5.8) | 29.0 (6.1) |
| Race/ethnicity | |||
| White non-Hispanic | 682 (68.2) | 84 (77.8) | 598 (67.0) |
| Other races | 318 (31.8) | 24 (22.2) | 294 (33.0) |
| BMI, mean (SD), kg/m2 | |||
| Prepregnancy | 26.1 ( 6.2) | 26.5 (6.3) | 26.0 (6.3) |
| At delivery | 32.0 (6.3) | 32.0 (6.7) | 32.0 (6.3) |
| Smoking | |||
| Never smoker | 762 (76.3) | 66 (61.1) | 696 (78.1) |
| Current or past smoker | 237 (23.7) | 42 (38.9) | 195 (21.9) |
| Diabetes | 95 (9.5) | 13 (12.04) | 82 (9.19) |
| Kidney disease | 14 (1.4) | 3 (2.8) | 11 (1.23) |
| Prenatal vitamin intake | |||
| Iron or folate | 160 (16.0) | 13 (12.0) | 147 (16.5) |
| None or missing | 840 (84.0) | 95 (88.0) | 745 (83.5) |
| Mode of delivery | |||
| Vaginal | 527 (52.8) | 48 (44.9) | 479 (53.7) |
| Cesarean delivery | 333 (33.3) | 41 (38.3) | 292 (32.7) |
| C after failed V | 139 (13.9) | 18 (16.8) | 121 (13.6) |
| Gestational age at birth, mean (SD), wk | 38.6 (2.4) | 37.9 (3.1) | 38.7 (2.3) |
| Birth weight, mean (SD), g | 3290.0 (649.5) | 3117.0 (751.9) | 3311.0 (751.9) |
BMI = body mass index; C after V = Cesarean delivery after failed vaginal delivery.