Results of multivariate regression analysis
| Ln (Duration of oxygen supplementation) | ||||
|---|---|---|---|---|
| Coefficient | SE | p Value | R2 (%) | |
| SE, standard error. | ||||
| Birth weight | −0.0032 | 0.0004 | < 0.001 | 50.1 |
| A-aDo2 | 0.0026 | 0.0008 | 0.001 | − |
| Basal serum cortisol (day 14) | 0.0011 | 0.0004 | < 0.001 | − |









