Table 1. Texas Medicaid Newborn Study Cohorts for Texas Hospitals, 2010 to 2014a.
| Characteristics | Participants, No. (%) | ||
|---|---|---|---|
| Very low birth weight singletons (<1500 g) (n = 9938) | Late preterm singletons (34-36 wk) (n = 63 160) | Nonpreterm singletons (≥37 wk) (n = 801 182) | |
| Maternal characteristics | |||
| Education | |||
| Less than high school | 677 (6.8) | 5139 (8.1) | 67 633 (8.4) |
| Completed high school | 5999 (60.4) | 39 505 (62.5) | 492 248 (61.4) |
| Completed college | 3262 (32.8) | 18 516 (29.3) | 241 301 (30.1) |
| Maternal hypertension | 3237 (32.6) | 13 922 (22.0) | 85 174 (10.6) |
| Breech | 2971 (29.9) | 5761 (9.1) | 48 384 (6.0) |
| Fetal distress | 718 (7.2) | 3436 (5.4) | 40 869 (5.1) |
| Oligohydramnios | 72 (0.7) | 411 (0.7) | 1703 (0.2) |
| Polyhydramnios | 17 (0.2) | 102 (0.2) | 532 (0.1) |
| Cord prolapse | 701 (7.1) | 6888 (10.9) | 103 578 (12.9) |
| Rh isoimmunization | 2 (0.0) | 10 (0.0) | 12 (0.0) |
| Placenta abruption | 1823 (18.3) | 5058 (8.0) | 25 186 (3.1) |
| Antenatal steroids | 1817 (18.3) | 2892 (4.6) | 13 620 (1.7) |
| Maternal-newborn link | 7465 (75.1) | 52 478 (83.1) | 664 089 (82.9) |
| Newborn characteristics | |||
| Birth weight, mean (SD), g | 1028.9 (289.6) | 2664.0 (409.4) | 3318.7 (383.4) |
| Gestational age, mean (SD), wk | 27.6 (2.6) | 35.4 (0.8) | 38.9 (1.0) |
| Sex | |||
| Male | 4884 (49.1) | 29 476 (46.7) | 393 205 (49.1) |
| Female | 5054 (50.9) | 33 684 (53.3) | 407 977 (50.9) |
| Outborn (transferred) | 1394 (14.0) | 1189 (1.9) | 4291 (0.5) |
| Congenital anomalies | 1503 (15.1) | 2523 (4.0) | 9879 (1.2) |
| Key diagnosisb | 9680 (97.4) | 37 669 (59.6) | 240 436 (30.0) |
| Major procedure | 1177 (11.8) | 790 (1.3) | 1740 (0.2) |
| Death during newborn inpatient episode | 1210 (12.2) | 267 (0.4) | 447 (0.1) |
| Newborn utilization | |||
| NICU admission | 9469 (95.3) | 24 979 (39.5) | 52 945 (6.6) |
| Special care days per newborn, mean (SD) | 54.8 (49.8) | 4.4 (11.0) | 0.6 (4.6) |
| Length of stay, mean (SD), d | 57.4 (53.8) | 5.6 (12.2) | 2.1 (5.5) |
| 30-d postdischarge adverse events | 1398 (14.1) | 5857 (9.3) | 53 381 (6.7) |
Abbreviation: NICU, neonatal intensive care unit.
a
All cohorts restricted to birth weight of 400 g and greater and gestational age of 22 weeks or longer, excluding birth weight in less than the 3rd and greater than the 97th percentile for gestational age, limited to births within hospitals with NICU levels II to IV.
b
Presence of a diagnosis indicating a possible need for advanced care.