Independent predictors of chronic lung disease (c) by multivariate logistic regression analysis
| Factor | Odds Ratio | Confidence Interval | Significance |
| All infants | |||
| Gestational age | 0.475-150 | 0.30–0.75 | 0.001 |
| Multiple gestation | 3.1 | 1.2–8.1 | 0.02 |
| Antibiotics | 2.7 | 1.0–7.4 | 0.05 |
| Singletons only | |||
| Gestational age | 0.465-150 | 0.26–0.80 | 0.006 |
| U urealyticumisolated | 3.0 | 1.0–9.1 | 0.05 |
↵5-150 The odds ratio is the factor by which CLD (c) decreases for each week of gestational age over 24 weeks.