Table 4.

A General Linear Model Predicting Duration of Various Levels of Respiratory Support, Censored to 150 Days of Life

		Support Level Duration Predicted (Censored to 150 d of Life)	Total R2 of Model	P Value of Significant Variables*	Increase in Days of Support Duration per 1 Point Increase in MRI Score (95% CI)
		Any support	0.77	MRI score: 0.001	6.3 (2.8–9.7)
				Birth weight: 0.002
		Any PPV	0.91	MRI score: <0.0001	6.7 (4.3–9.6)
				Birth weight: 0.002
		Ventilator	0.86	MRI score: 0.001	8.1 (3.6–12.6)
				PH therapy: 0.025

Definition of abbreviations: CI = confidence interval; MRI = magnetic resonance imaging; PH = pulmonary hypertension; PPV = positive pressure ventilation.

Predictor variables included MRI score, gestational age, birth weight, multiparity, systemic PH medications, and pneumonia during neonatal ICU admission. MRI score was always the most significant predictor.

^*All other predictor variables were not significant in the model (P > 0.05).