Results of univariate logistic regression analysis of total study population
| Predicting factors | Median (10–90th centiles) | p value | Odds ratio | 95% CI |
|---|---|---|---|---|
| PMA, postmenstrual age; CMV, conventional mechanical ventilation; CPAP, continuous positive airway pressure. | ||||
| *p<0.05. | ||||
| †Patient characteristics at the time of the hypoxia test. | ||||
| PMA (weeks)† | 46 (36.8–113.6) | 0.005* | 0.96 | 0.93 to 0.99 |
| Corrected age (months)† | 1.4 (−0.7–17.0) | 0.005* | 0.82 | 0.67 to 0.95 |
| Body weight (kg)† | 4.6 (2.1–10.1) | 0.003* | 1.000 | 0.999 to 1.000 |
| Sex (boys:girls) | 25:22 | 0.87 | 1.13 | 0.26 to 4.85 |
| Gestational age (weeks) | 27.0 (24.0–30.2) | 0.90 | 0.98 | 0.68 to 1.22 |
| Birth weight (kg) | 0.9 (0.6–1.6) | 0.68 | 1.00 | 0.999 to 1.002 |
| Apgar scores at 5 min | 8 (4–9) | 0.97 | 1.01 | 0.53 to 1.33 |
| Days of CMV | 9.0 (1.0–53.0) | 0.87 | 1.00 | 0.97 to 1.02 |
| Days of CPAP | 10.0 (2.0–32.4) | 0.08 | 1.07 | 0.99 to 1.15 |
| Maximum Fio2 (%) | 60.0 (34.0–100.0) | 0.98 | 1.00 | 0.97 to 1.03 |
| Days on O2 in hospital | 65.0 (7.2–145.0) | 0.86 | 1.00 | 0.98 to 1.03 |
| Days on O2 at home | 0.0 (0.0–125.8) | 0.04* | 0.99 | 0.97 to 1.00 |
| Total days of O2 | 71.0 (7.2–264.2) | 0.15 | 0.99 | 0.98 to 1.00 |
| Days off O2 | 18.0 (5.8–334.8) | 0.03* | 0.994 | 0.989 to 0.999 |