Table 1.
Maternal characteristics and perinatal outcomes of twin pregnancies by severe maternal morbidity screening statusa
| Screen negative for severe maternal morbidity (n = 2,202) | Screen positive for severe maternal morbidity (n = 165) | |
|---|---|---|
| Maternal age (y), mean (SD) | 30 (5.9) | 31 (6.2) |
| Maternal age >35 y | 537 (24) | 47 (29) |
| Maternal race/ethnlclty | ||
| Non-Hlspanlc White | 1,754 (80) | 124 (76) |
| Non-Hlspanlc Black | 374 (17) | 34 (21) |
| Hispanic | 14 (1.0) | 2(1.2) |
| Other | 55 (2.5) | 4 (2.4) |
| Insurance | ||
| Private | 1,252 (56) | 88 (53) |
| Medicaid | 941 (43) | 76 (46) |
| Other | 9 (0.4) | 1 (1.0) |
| Parity | ||
| Nulliparous | 997 (45) | 97 (59) |
| Multiparous | 1,205 (55) | 68 (41) |
| Assisted reproductive technology | ||
| None | 1,657 (75) | 105 (64) |
| In vitro fertilization | 351 (16) | 42 (26) |
| Other | 194 (9) | 18 (10) |
| Chorionicity | ||
| Dichorionic | 1,754 (80) | 135 (82) |
| Monochorionic | 448 (20) | 30 (18) |
| Prepregnancy hypertension | 104 (4.7) | 14 (8.5) |
| Prepregnancy diabetes | 55 (2.5) | 7 (4.2) |
| Preterm birth <32 wk | 369 (17) | 40 (24) |
| Preeclampsia | 393 (18) | 61 (37) |
| Birthweight Twin A (g), mean (SD) | 2,283 (721) | 2,155 (782) |
| Birthweight Twin B (g), mean (SD) | 2,263 (712) | 2,154 (772) |
Abbreviation: SD, standard deviation.
a
Screen-positive deliveries met one of the following criteria: one of the Centers for Disease Control and Prevention (CDC) International Classification of Diseases 9th Revision diagnosis and procedure codes for the identification of severe maternal morbidity; prolonged postpartum length of stay (>3 standard deviations beyond the mean length of stay by mode of delivery); OR maternal intensive care unit (ICU) admission.