Table 1.
Demographic Characteristics
| Underweight n=389 |
Normal weight n=4,522 |
Overweight n=1,937 |
Obese n=1,445 |
P | |
|---|---|---|---|---|---|
| Age (years) | 22.1 ± 4.3 | 23.7 ± 5.3 | 23.9 ± 5.4 | 23.4 ± 5.0 | <0.001 |
| Race * | <0.001 | ||||
| African American | 100 (25.7) | 802 (17.7) | 487 (25.1) | 598 (41.4) | |
| Hispanic | 108 (27.8) | 1,402 (31.0) | 642 (33.1) | 315 (21.8) | |
| Caucasian | 169 (43.4) | 2,217 (49.0) | 780 (40.3) | 521 (36.1) | |
| Asian | 8 (2.1) | 71 (1.6) | 16 (0.8) | 4 (0.3) | |
| Other | 4 (1.0) | 30 (0.7) | 12 (0.6) | 7 (0.5) | |
| Prepregnancy BMI† | 17.6 ± 0.8 | 21.9 ± 1.7 | 27.1 ± 1.4 | 35.6 ± 5.2 | <0.001 |
| Gestational age at study entry | 13.5 ± 2.1 | 13.5 ± 2.1 | 13.4 ± 2.1 | 13.3 ± 2.1 | 0.05 |
| BMI at study entry | 18.7 ± 1.3 | 22.7 ± 2.1 | 28.0 ± 2.1 | 36.3 ± 5.3 | <0.001 |
| Smoker | 82 (21.1) | 576 (12.7) | 293 (15.1) | 312 (21.6) | <0.001 |
| Education level (years) | 12.6 ± 2.5 | 13.0 ± 2.8 | 12.7 ± 2.8 | 12.7 ± 2.3 | <0.001 |
BMI, body mass index.
Data are mean ± standard deviation or number (%).
*
Race or ethnic group is self-reported.
†
Self-reported prepregnancy weight used to calculate prepregnancy body mass index.