Table 3

Results of multivariate regression analysis

Ln (Duration of oxygen supplementation)
CoefficientSEp ValueR2 (%)
SE, standard error.
Birth weight−0.00320.0004< 0.00150.1
A-aDo20.00260.00080.001
Basal serum cortisol (day 14)0.00110.0004< 0.001