Table 1.
Demographic and clinical characteristics for preterm neonates
| Demographic | |
| Subjects (n) | 158 |
| MRI scans (n) | 229 |
| Sex: male (n) | 131 |
| GA at birth (weeks, mean ± SD) | 28.2 ± 2.0 |
| PMA at MRI | |
| 1st scans | 31.6 ± 1.9 |
| 2nd scans | 35.9 ± 1.9 |
| Characteristic a | Number (%) |
| Maternal/antenatal factors | |
| Maternal age, years | 30.0 ± 7.2 |
| Placenta previa | 9 (10.2) |
| Drug abuseb | 5 (5.7) |
| Magnesium sulfate | 62 (70.5) |
| Exposure to prenatal steroids | 80 (90.9) |
| Chorioamnionitis | 18 (20.5) |
| Delivery/perinatal factors | |
| Twin | 35 (39.8) |
| Birth weight, g | 1081 ± 326.8 |
| Caesarean section delivery | 55 (62.5) |
| Postnatal factors | |
| Exposure to postnatal steroids | 11 (12.5) |
| Hypotension | 48 (54.5) |
| Infant infection | 56 (63.6) |
| Patent ductus arteriosus | 45 (5.11) |
| Necrotizing enterocolitisc | 4 (4.5) |
| Duration of intubation, days | 9.9 ± 21.0 |
| Chronic lung disease | 21 (23.9) |
Note: Numbers and percentages were derived from 88 preterm subjects whose data was recorded and known.
aData presented as number (%) or mean ± standard deviation.
bAll subjects with maternal smoking (based on self-report) were exposed to marijuana, two were also exposed to tobacco.
cIt was diagnosed based on Bell’s stage II criteria (Kliegman et al. 1982).