Table 3.
Predictors of Readmission Within 30 Days of Index COPD Exacerbation Hospitalisation
| Risk Factor | OR | 95% CI | P value | AUC (95% CI) | P value |
|---|---|---|---|---|---|
| Univariate analysis | |||||
| Number of Exacerbations (<12 months) | 1.27 | 1.03–1.60 | 0.027 | 0.66 (0.54–0.78) | 0.01 |
| Number of hospitalised exacerbations (<12 months) | 1.39 | 1.05–1.80 | 0.021 | 0.67 (0.55–0.79) | 0.008 |
| CAT at discharge | 1.14 | 1.04–1.24 | 0.004 | 0.68 (0.55–0.81) | 0.006 |
| Frailty Score | 1.72 | 1.32–2.29 | <0.001 | 0.81 (0.71–90) | <0.001 |
| Depression | 1.12 | 1.01–1.24 | 0.038 | 0.65 (0.53–0.77) | 0.02 |
| PIFR at admission (L/min) | 0.94 | 0.92–0.97 | <0.001 | 0.77 (0.67–0.88) | <0.001 |
| PIFR at discharge (L/min) | 0.93 | 0.90–0.96 | <0.001 | 0.86 (0.78–0.95) | <0.001 |
| Length of stay (days) | 1.08 | 1.01–1.16 | 0.034 | 0.64 (0.52–0.76) | 0.03 |
| Change in PIFR (L/min) | 0.93 | 0.89–0.97 | 0.001 | 0.66 (0.53–0.78) | 0.02 |
| Change in CAT | 1.12 | 1.02–1.22 | 0.019 | 0.76 (0.65–0.87) | <0.001 |
| Multivariable analysis | |||||
| Frailty score | 1.31 | 0.96–1.80 | 0.08 | ||
| PIFR at discharge (L/min) | 0.94 | 0.91–0.97 | <0.001 | ||
| CAT at discharge | 1.01 | 0.91–1.13 | 0.77 | ||
Abbreviations: AUC, area under curve; CAT, COPD Assessment Test; FEV1%, predicted forced expiratory volume in 1 second; PIFR, peak inspiratory flow rate; OR, odd ratio; CI, confidence interval.