TABLE 1.
Characteristics of 7572 deliveries in the Nulliparous Pregnancy Outcomes Study: monitoring mothers-to-be
| n (%) | |
|---|---|
| Maternal age, y | |
| <25 | 2443 (32) |
| 25‒34 | 4394 (58) |
| ≥35 | 735 (10) |
| Maternal race/ethnicity | |
| Non-Hispanic white | 4852 (64) |
| Non-Hispanic black | 821 (11) |
| Hispanic | 1227 (16) |
| Other | 672 (9) |
| Maternal education | |
| High school or less | 1313 (17) |
| Some college | 1358 (18) |
| College graduate | 3006 (40) |
| Graduate degree | 1895 (25) |
| Prepregnancy BMI | |
| Underweight | 296 (4) |
| Normal weight | 4280 (56) |
| Overweight | 1638 (22) |
| Obese | 1358 (18) |
| Smoking status | |
| Nonsmoker | 6322 (83) |
| Smoker | 1250 (17) |
| Marital status | |
| Not married | 2713 (36) |
| Married | 4859 (64) |
| Insurance at delivery | |
| Private | 5748 (76) |
| Public | 1824 (24) |