Table 1.
Characteristics of People Delivering Twins by Gestational Diabetes Status, 2003–2013 (n=2,573)
| Characteristic | No Gestational Diabetes (n=2406) | Gestational Diabetes (n=167) |
|---|---|---|
| Race-ethnicity | ||
| Non-Hispanic white | 1920 (80) | 138 (83) |
| Non-Hispanic black | 396 (16) | 13 (7.0) |
| Hispanic | 23 (1.0) | 1 (1.0) |
| Non-Hispanic other | 67 (3.0) | 15 (9.0) |
| Prepregnancy BMI category | ||
| Underweight | 81 (3.0) | 4 (2.0) |
| Normal weight | 1213 (50) | 55 (33) |
| Overweight | 596 (25) | 42 (25) |
| Obese | 516 (22) | 66 (40) |
| Age (y) | ||
| Less than 35 | 1,861 (77) | 101 (60) |
| Greater than or equal to 35 | 545 (23) | 66 (40) |
| Parity | ||
| Nulliparous | 1,090 (45) | 87 (52) |
| Multiparous | 1,316 (55) | 80 (48) |
| Smoking prior to pregnancy | ||
| No | 2,069 (86) | 150 (90) |
| Yes | 337 (14) | 17 (10) |
| Insurance | ||
| Private | 1665 (69) | 132 (79) |
| Medicaid, self-pay, or other | 738 (31) | 35 (21) |
| In Vitro Fertilization | ||
| No | 2,041 (85) | 116 (69) |
| Yes | 365 (15) | 51 (31) |
| Preexisting hypertension | ||
| No | 2,297 (95) | 157 (94) |
| Yes | 109 (5.0) | 10 (6.0) |
| Birthweight at Delivery (grams) | ||
| Twin A Mean (SD) | 2338 (655) | 2403 (604) |
| Twin B Mean (SD) | 2285 (671) | 2315 (623) |