Table I:
Study Participants’ Demographic Characteristics
| Maternal Vitamin E Subcohort (N=652) | |
|---|---|
| Infants | Median [IQR: 25th, 75th] or n (%) |
| Gestational age (weeks) | 39 [39, 40] |
| Infant age at enrollment (days) | 50 [16, 80] |
| Infant race or ethnicity | |
| Black | 134 (21%) |
| White | 400 (61%) |
| Hispanic | 64 (10%) |
| Other | 54 (8%) |
| Birth weight (grams) | 3433 [3150, 3774] |
| Sex | |
| Female | 343 (53%) |
| Male | 309 (47%) |
| Parents | |
| Maternal age at enrollment (years) | 26 [23,31] |
| Post pregnancy BMI* | 27.5 [24.2, 32.4] |
| Mother ever smoked | 240 (37%) |
| Smoked during pregnancy | 115 (18%) |
| Prenatal vitamin use during pregnancy | 609 (93%) |
| Breastfeeding at enrollment | 331 (51%) |
| Maternal history of asthma | 141 (22%) |
| Maternal history of allergies | 171 (26%) |
| Paternal history of asthma | 100 (15%) |
| Paternal history of allergies | 166 (25%) |
*
BMI, body mass index (kg/m2) was available in N=517 of the vitamin E participants