Table 5.
Multivariable-Adjusted Changes in Anthropometric Characteristics by Age at First Birtha
| Characteristic | Mean Change (SE) |
Difference in Means (95% CI)b | |
|---|---|---|---|
| <16 y at First Birth | ≥16 y at First Birth | ||
| Black Females | |||
| No. of participants | 61 | 248 | |
| Height, cm | 20.1 (0.6) | 20.6 (0.3) | −0.6 (−1.9 to 0.6) |
| Weight, kg | 36.8 (1.9) | 33.9 (1.1) | 2.9 (−0.8 to 6.6) |
| Body mass indexc | 9.8 (0.7) | 8.6 (0.4) | 1.2 (0 to 2.5) |
| Waist circumference, cm | 15.9 (1.2) | 14.8 (0.7) | 1.1 (−1.4 to 3.4) |
| Hip circumference, cm | 23.8 (1.3) | 22.2 (0.7) | 1.6 (−0.9 to 4.1) |
| Waist to hip ratio | −0.031 (0.006) | −0.032 (0.003) | 0.001 (−0.1 to 0.01) |
| Body fat % | 16.0 (1.4) | 14.0 (0.8) | 2.0 (−0.8 to 4.8) |
| White Females | |||
| No. of participants | 12 | 73 | |
| Height, cm | 21.7 (1.3) | 22.7 (0.6) | −1.0 (−3.6 to 1.6) |
| Weight, kg | 29.5 (3.8) | 33.9 (1.7) | −4.4 (−12.3 to 3.5) |
| Body mass indexc | 6.9 (1.3) | 8.1 (0.6) | −1.3 (−3.8 to 1.6) |
| Waist circumference, cm | 13.0 (2.4) | 14.9 (1.1) | −1.9 (−3.3 to 6.9) |
| Hip circumference, cm | 21.1 (2.6) | 23.2 (1.1) | −2.1 (−7.5 to 3.2) |
| Waist to hip ratio | −0.041 (0.012) | −0.035 (0.005) | 0.006 (−0.2 to 0) |
| Body fat % | 10.3 (2.9) | 11.4 (1.3) | −1.1 (−7.1 to 4.9) |
Abbreviations: CI, confidence error; SE, standard error.
a
Adjusted for baseline measurement, age, family income, study site, parental education, age at menarche, and height at baseline and end of follow-up for change in weight model. Race interaction: change in weight, P = .10; change in height, P = .76; change in body mass index, P = .14; change in waist circumference, P = .31; change in hip circumference, P = .22; change in waist to hip ratio, P = .18; change in percent body fat, P = .36.
b
Not all age group differences in mean changes are statistically significant.
c
Calculated as weight in kilograms divided by height in meters squared.