Table 2. Unadjusted and adjusted associations between predictor and potentially avoidable readmission (PAR).
| Predictor | Non-PAR (n = 5645) | PAR (n = 340) | Univariable analysis | Multivariable analysis | ||
|---|---|---|---|---|---|---|
| n | % | n | % | OR (95%-CI)* | ||
| Admission in previous 6 months | 1,254 | 22.2 | 106 | 31.2 | 1.59 (1.25–2.01) | 1.39 (1.08–1.77) |
| Length of hospital stay | 4,146 | 73.4 | 269 | 79.1 | 1.37 (1.05–1.8) | 1.08 (0.82–1.44) |
| Anaemia | 1,134 | 20.1 | 101 | 29.7 | 1.68 (1.32–2.13) | 1.45 (1.12–1.85) |
| Heart failure | 1,256 | 22.2 | 105 | 30.9 | 1.56 (1.23–1.98) | 1.41 (1.09–1.81) |
| Hypertension | 3,919 | 69.4 | 246 | 72.4 | 1.15 (0.91–1.48) | 1.1 (0.86–1.42) |
| Acute myocardial infarction | 259 | 4.6 | 16 | 4.7 | 1.03 (0.59–1.67) | 0.95 (0.53–1.59) |
| Chronic ischemic heart disease | 1,420 | 25.2 | 92 | 27.1 | 1.1 (0.86–1.41) | 1.04 (0.8–1.35) |
| Diabetes with organ damage | 432 | 7.7 | 35 | 10.3 | 1.38 (0.95–1.96) | 1.18 (0.8–1.69) |
| Cancer | 584 | 10.3 | 45 | 13.2 | 1.32 (0.94–1.81) | 1.08 (0.71–1.59) |
| Metastatic carcinoma | 376 | 6.7 | 32 | 9.4 | 1.46 (0.98–2.09) | 1.23 (0.76–1.94) |
| Opioids | 1,466 | 26.0 | 123 | 36.2 | 1.62 (1.28–2.03) | 1.4 (1.1–1.78) |
| Hyperkalaemia | 14 | 0.2 | 2 | 0.6 | 2.38 (0.37–8.56) | 1.75 (0.27–6.44) |
Notes
* = The low risk group was used as reference for comparison with the medium and high risk groups. OR = Odds ratio; CI = Confidence interval.