Table 1.
Demographic characteristics of singleton pregnancies among women without pre-pregnancy diseases by pre-pregnancy obesity, Consortium on Safe Labor 2002–2008
| Characteristics | Normal BMI (18.5–24.9) (n=66,463, 59.2%) |
Overweight (25–29.9) (n=26,364, 23.5%) |
Obese I (30–34.9) (n= 11,598, 10.3%) |
Obese II (35–39.9) (n=4,779, 4.3%) |
Obese III (≥ 40) (n=3,105, 2.8%) |
P value* |
|---|---|---|---|---|---|---|
| Age (years) | 27.4 (±6.1) | 27.7 (±6.0) | 27.8 (±5.9) | 27.8 (±5.7) | 27.8 (±5.6) | < 0.001 |
| Race/ethnicity, n (%) | ||||||
| White | 37,372 (56.2) | 12,031 (45.6) | 5,045 (43.5) | 2,098 (43.9) | 1,209 (38.9) | < 0.001 |
| Black | 9,901 (14.9) | 5,780 (21.9) | 3,082 (26.6) | 1,479 (31.0) | 1,238 (39.9) | |
| Hispanic | 12,195 (18.4) | 6,340 (24.1) | 2,596 (22.4) | 895 (18.7) | 475 (15.3) | |
| Asian/Pacific Islanders | 3,200 (4.8) | 664 (2.5) | 242 (2.1) | 90 (1.9) | 45 (1.5) | |
| Multi-race/Others/Unknown | 3,795 (5.7) | 1,549 (5.9) | 633 (5.5) | 217 (4.5) | 138 (4.4) | |
| Marital status, n (%) | < 0.001 | |||||
| Married | 44,778 (67.4) | 16,050 (60.9) | 6,667 (57.5) | 2,632 (55.1) | 1,493 (48.1) | |
| Unmarried | 20,709 (31.2) | 9,819 (37.2) | 4,689 (40.4) | 2,033 (42.5) | 1,532 (49.3) | |
| Unknown | 976 (1.5) | 495 (1.9) | 242 (2.1) | 114 (2.4) | 80 (2.6) | |
| Insurance type, n (%) | < 0.001 | |||||
| Private | 36,693 (55.2) | 13,268 (50.3) | 5,752 (49.6) | 2,403 (50.3) | 1,447 (46.6) | |
| Public/Self pay | 18,037 (27.1) | 9,400 (35.7) | 4,594 (39.6) | 1,970 (41.2) | 1,443(46.5) | |
| Others/Unknown | 11,733 (17.7) | 3,696 (14.0) | 1,252 (10.8) | 406 (8.5) | 215 (6.9) | |
| Parity, n (%) | < 0.001 | |||||
| Nulliparous | 29,992 (45.1) | 9,477 (36.0) | 3,600 (31.0) | 1,454 (30.4) | 955 (30.8) | |
| Smoking, n (%) | 3,420 (5.2) | 1,588 (6.0) | 806 (7.0) | 366 (7.7) | 248 (8.0) | 0.002 |
| Alcohol, n (%) | 1,111 (1.7) | 396 (1.5) | 176 (1.5) | 73 (1.5) | 44 (1.4) | 0.01 |
More than one delivery was contributed by 2, 878 normal BMI women (4.3%), 863 overweight women (3.3%), 351 obese class I women (3.0%), 114 obese class II (2.4%), and 95 obese class III women (3.1%). To adjust for clustering, models included robust standard errors from generalized estimating equations.
*
P values are based on generalized estimating equations and adjusted for study site.