Table 1.
Characteristics of 2,084 mothers and children for a study of prepregnancy BMI, pregnancy weight gain, and child neurodevelopment (Child Health and Development Studies participants in the 9‐ to 11‐year follow‐up study)
| Maternal | |
|---|---|
| Prepregnancy BMI, kg/m2 (Mean ± SD) | 22.0 ± 3.4 |
| Prepregnancy BMI category, % | |
| Underweight (<18.5 kg/m2) | 8.7 |
| Normal weight (18.5–24.9 kg/m2) | 77.2 |
| Overweight (25–29.9 kg/m2) | 11.2 |
| Obese (≥30 kg/m2) | 2.8 |
| Pregnancy weight gaina, kg (Mean ± SD) | 12.0 ± 4.3 |
| Gestational age at delivery, weeks (Mean ± SD) | 39.4 ± 1.9 |
| Maternal race, % | |
| White | 71.6 |
| Black | 21.4 |
| Hispanic | 2.7 |
| Asian | 4.4 |
| Multiparous, % yes | 77.8 |
| Maternal age, years (Mean ± SD) | 28.4 ± 5.9 |
| Maternal education, % | |
| Less than high school | 12.7 |
| High school and/or trade school | 43.2 |
| Some college/college degree | 44.1 |
| Maternal raw Peabodyb, score | 125.5 ± 18.4 |
| Married (yes/no), % | 98.6 |
| Income, relative to 1960 census median, % | |
| Below median | 34.5 |
| At median | 16.3 |
| Above median | 49.2 |
| Child | |
| Male sex, % | 51.7 |
| Preterm deliveryc, % | 6.3 |
| Birthweight, g (Mean ± SD) | 3352 ± 508 |
| Age at 9‐year exam, years (Mean ± SD) | 9.8 ± 0.82 |
| Weight at age 9, kg (Mean ± SD) | 33.5 ± 7.2 |
| Height at age 9, cm (Mean ± SD) | 137.6 ± 7.6 |
| Standardized Peabody scored (Mean ± SD) | 50.6 ± 10.0 |
| Standardized Raven scored (Mean ± SD) | 50.4 ± 10.0 |
BMI = body mass index; SD = standard deviation.
a
Pregnancy weight gain was coded as a continuous variable defined as the last measured weight prior to delivery minus the self‐reported prepregnancy weight.
b
Maternal Peabody was administered in a subset of women in the CHDS, and in our analytic sample, 1,652 women had Peabody scores.
c
Defined as gestational age at delivery <37 weeks.
d
Standardized for race, age, and sex.