Table 4.

Predictors for noninvasive ventilation failure

Variable	Odds Ratio (95% CI) (N = 26; 4.7%)	P Value
No. of prior admissions within 1 yr
0	Referent
1	0.51 (0.10–2.59)	0.42
2+	2.76 (1.04–7.27)	0.04
Congestive heart failure	2.23 (0.86–6.81)	0.10
Diabetes mellitus	2.73 (1.10–6.81)	0.03
Pneumonia POA	5.68 (2.04–15.86)	0.001

Definition of abbreviations: CI = confidence interval; POA = present on admission.

NIV failure indicates invasive mechanical ventilation after NIV. Odds ratios > 1 mean that if the variable is present, the patient is more likely to have NIV failure (the odds of NIV failure are 2.74 times greater, for example, with congestive heart failure than without).