Baseline Characteristics of Women with and without Anemia Information
| Maternal Characteristic | No Anemia Information (N=56,734) | Anemia Information (N=171,704) | p-value |
|---|---|---|---|
| Maternal age (years) (N=228,115) | 27.5 ± 6.2 | 27.7 ± 6.2 | <0.001 |
| Prepregnancy BMI (kg/m2) (N=151,620) | 25.6 ± 6.3 | 25.4 ± 6.2 | <0.001 |
| Nulliparity (N=228,438) | 22,065 (38.9%) | 69,206 (40.3%) | <0.001 |
| Race (N=228,437) | <0.001 | ||
| White Non-Hispanic | 34,834 (61.4%) | 78,390 (45.7%) | |
| Non-Hispanic Black | 7,528 (13.3%) | 43,864 (25.5%) | |
| Hispanic | 7,138 (12.6%) | 32,578 (19.0%) | |
| Other | 7.234 (12.7%) | 16,871 (9.8%) | |
| Marital status (N=220,987) | <0.001 | ||
| 1 Married | 32,651 (61.8%) | 101,795 (60.5%) | |
| 2 Divorced | 923 (1.8%) | 2,683 (1.6%) | |
| 3 Single | 19,226 (36.4%) | 63,709 (37.9%) | |
| Education status (N=71,837) | <0.001 | ||
| Less than HS diploma | 616 (45.4%) | 13,808 (19.6%) | |
| HS diploma | 462 (34.0%) | 21,604 (30.7%) | |
| More than HS diploma | 280 (20.6%) | 35,067 (49.7%) | |
| Insurance (N=204,392) | <0.001 | ||
| Private | 41,707 (74.4%) | 86,326 (58.2%) | |
| Public | 13,819 (24.7%) | 59,821 (40.3%) | |
| Self-pay | 500 (0.9%) | 2,219 (1.5%) | |
| History of cesarean (N=215,219) | 7,350 (13.3%) | 23,979 (15.0%) | <0.001 |
| Pregestational diabetes (N=220,560) | 514 (1.1%) | 4,263 (2.5%) | <0.001 |
| Chronic hypertension (N=205,893) | 759 (1.6%) | 5,369 (3.4%) | <0.001 |
| Asthma (N=220,560) | 4,270 (8.7%) | 11,124 (6.5%) | <0.001 |
| Gestational diabetes (N=202,169) | 2,503 (5.1%) | 5,220 (3.4%) | <0.001 |
| Tobacco use (N=228,438) | 5,500 (9.7%) | 9,747 (5.7%) | <0.001 |
| Alcohol use (N=228,438) | 466 (0.8%) | 3,714 (2.2%) | <0.001 |
BMI=body mass index, HS=high school
Data displayed as number (percentage) or mean ± SD