TABLE 4.
Models Using Variables at 7 DAYS of Age (n = 6996)
| Variable | Time Period When Variable Was Evaluated | AUC c-statistic | % Increase in AUC | OR (95% CI) | P |
|---|---|---|---|---|---|
| Death/NDI | |||||
| Birth weight, g | Birth | 0.659 | 0.71 (0.68–0.74) (per 100-g increase) | <.0001 | |
| Highest Fio2 on day 7 | Day 7 | 0.690 | 3.1 | 1.18 (1.14–1.21) (per 10% increase) | <.0001 |
| Male gender | Birth | 0.708 | 1.8 | 1.88 (1.69–2.10) | <.0001 |
| IVH grade (diagnosis by day 7) | Day 7 | 0.717 | 0.9 | 4.40 (3.04–6.39) grade IV | <.0001 |
| 1.91 (1.33–2.74) grade III | |||||
| Days on CPAP (to day 7) | Day 7 | 0.724 | 0.7 | 0.89 (0.86–0.92) (per 1 d more) | <.0001 |
| Death before discharge | |||||
| Highest Fio2 on day 7 | Day 7 | 0.716 | 1.28 (1.24–1.32) | <.0001 | |
| Birth weight, g | Birth | 0.760 | 4.4 | 0.62 (0.59-0.65) | <.0001 |
| IVH grade (diagnosis by day 7) | Day 7 | 0.770 | 1.0 | 3.55 (2.65–4.75) grade IV | <.0001 |
| 1.89 (1.31–2.74) grade III | |||||
| Male gender | Birth | 0.774 | 0.4 | 1.61 (1.40–1.86) | <.0001 |
| NDI in survivors | |||||
| Birth weight, g | Birth | 0.606 | 0.82 (0.78–0.86) | <.0001 | |
| Male gender | Birth | 0.639 | 3.3 | 1.76 (1.56–2.00) | <.0001 |
| Days on CPAP (to day 7) | Day 7 | 0.655 | 1.6 | 0.98 (0.93-1.02) (per 1 d more) | .2720 |
| Apgar score at 5 min | Birth | 0.662 | 0.7 | 0.93 (0.90–0.96) (per point increase) | <.0001 |
| Days on HFV (to day 7) | Day 7 | 0.667 | 0.5 | 1.20 (1.14–1.26) (per 1 d more) | <.0001 |
| Days on CV (to day 7) | Day 7 | 0.676 | 0.8 | 1.11 (1.07–1.14) (per 1 d more) | <.0001 |
CI, confidence interval; CV, conventional ventilator; HFV, high-frequency ventilator; OR, odds ratio.