Table 3.
Attributes of infants who survived to 1 year adjusted age in Epochs 1 and 2.
| Epoch 1 (n = 207)* | Epoch 2 (n = 251)* | |||
| Seen (n = 187) | Not Seen (n = 20) | Seen (n = 214) | Not Seen (n = 37) | |
| Postnatal steroids | 27 (14) | 0 | 30 (14) | 3 (8) |
| Airleak† | 23 (12) | 0 | 21 (10) | 4 (11) |
| Chronic lung disease‡ | 81 (43) | 4 (20) | 91 (43) | 9 (24) |
| CUS abnormality§ | 13 (7) | 1 (5) | 28 (13) | 1 (3) |
| Non-white | 88 (47) | 9 (45) | 101 (47) | 12 (57) |
| Severe ROP∥ | 23 (12) | 1 (5) | 30 (14) | 4 (11) |
| Multiple gestation | 11 (6) | 3 (15) | 48 (22) | 2 (5) |
| Mother married | 102 (55) | 8 (40) | 107 (50) | 12 (32) |
| Maternal education¶ | ||||
| < High School | 35 (21) | 39 (23) | ||
| High School | 73 (45) | 63 (36) | ||
| > High School | 55 (34) | 71 (41) | ||
* Data presented as number of infants (percentages of group).
† Pneumothorax or pulmonary interstitial emphysema
‡ Use of supplemental oxygen at 36 weeks postmenstrual age
§ Cranial ultrasound abnormality: post-hemorrhagic hydrocephalus; persistent ventricular dilation; intraparenchymal echolucency
∥ Severe ROP, retinopathy of prematurity requiring surgery
¶ Maternal education data were available for 163 Epoch 1 subjects and 173 Epoch 2 subjects who were seen at 12 months adjusted age