Table 2.
Predictors for initial noninvasive versus invasive mechanical ventilation for the patients included in the study
| Variable | Odds Ratio (95% CI) | P Value |
|---|---|---|
| Age (per 5 yr) | 1.06 (1.01–1.11) | 0.02 |
| Prior admission within past 12 mo | ||
| 0 | Referent | |
| 1 | 0.90 (0.60–1.35) | 0.61 |
| 2+ | 1.77 (1.10–2.84) | 0.02 |
| Prior NIV within past 12 mo | 2.73 (1.51–4.94) | 0.001 |
| Prior IMV within past 12 mo | 0.36 (0.20–0.64) | 0.001 |
| LAPS (per 5 units) | 0.85 (0.82–0.88) | <0.001 |
| Status asthmaticus | 0.30 (0.18–0.52) | <0.001 |
| Pneumonia POA | 0.52 (0.35–0.78) | 0.002 |
| Neurological disorders | 0.23 (0.13–0.41) | <0.001 |
| Weight loss | 0.20 (0.08–0.52) | 0.001 |
| Diabetes mellitus (with and without complications) | 1.45 (1.00–2.08) | 0.05 |
Definition of abbreviations: CI = confidence interval; IMV = invasive mechanical ventilation; LAPS = Laboratory Acute Physiology Score; NIV = noninvasive ventilation; POA = present on admission.
NIV initial refers to the first method of ventilation during hospitalization. NIV initial includes NIV failure.