| Gestational age, per wk |
0.96 (0.85-1.08) |
| Birth weight, per 100 g |
0.87 (0.78-0.98) |
| Male sex |
1.04 (0.81-1.33) |
| Multiple gestation |
1.55 (1.16-2.07) |
| Race/ethnicity |
|
| White vs black |
1.27 (0.89-1.80) |
| Hispanic vs black |
1.34 (0.83-2.17) |
| Any surfactant therapy |
1.10 (0.74-1.64) |
| Age of mother, for each year older |
1.02 (0.99-1.05) |
| Cystic periventricular leukomalacia or grade 3-4 intraventricular hemorrhage |
1.83 (1.36-2.47) |
| Bronchopulmonary dysplasia |
2.22 (1.56-2.98) |
| Necrotizing enterocolitis |
1.40 (0.93-2.10) |
| Sepsis |
1.34 (1.04-1.72) |
| Postnatal corticosteroid use |
1.46 (1.09-1.96) |
| Mother single at delivery |
0.93 (0.68-1.27) |
| Grade ≥3 retinopathy of prematurity with plus disease |
1.27 (0.91-1.76) |
| Primary caregiver educational level less than high school |
1.28 (0.93-1.77) |
| ≥6 Persons in household |
1.13 (0.82-1.55) |
| ≥3 Places lived since discharge |
1.19 (0.84-1.70) |
| Living with mother at the time of follow-up |
0.19 (0.13-0.28) |
| Primary language not English |
0.89 (0.56-1.40) |
| Medicaid insurance or Medicaid health maintenance organization |
1.50 (1.08-2.10) |
