Table 2. Influence of Variables on Readmission Rates a.
| Variables | Odds Ratio | Lower 95% CI | Upper 95% CI | P Value |
|---|---|---|---|---|
| Gender | ||||
| Male (reference) | 1 | |||
| Female | 1.34 | 0.653 | 2.766 | 0.422 |
| Treatment | ||||
| DHS/Asnis | 1 | |||
| Cephalomedullary nail | 1.51 | 0.407 | 1.081 | 0.099 |
| Hip hemiarthroplasty/THR | 3.10 | 0.193 | 1.802 | 0.355 |
| Time to surgery | ||||
| < 36 h (reference) | 1 | |||
| 36 h - 6 d | 1.62 | 0.156 | 2.449 | 0.493 |
| > 6 d | 1.29 | 0.198 | 3.02 | 0.711 |
| Length of stay, day | ||||
| < 7 (reference) | 1.00 | |||
| 7 - 14 | 7.04 | 0.058 | 0.348 | < 0.001 b |
| 14 - 21 | 2.90 | 0.184 | 0.646 | 0.001 b |
| 21 - 28 | 1.83 | 0.256 | 1.167 | 0.119 |
| 28 - 35 | 2.11 | 0.191 | 1.179 | 0.108 |
| + 35 | 3.00 | 0.115 | 0.968 | 0.043 |
| OR overall > 7 d | 3.13 | 0.123 | 0.623 | 0.002 b |
| Alcohol consumption | ||||
| None (reference) | 1.00 | |||
| Moderate alcohol | 1.36 | 0.311 | 1.736 | 0.483 |
| Alcoholic | 1.52 | 0.26 | 1.667 | 0.378 |
| Affected side | ||||
| Right (reference) | 1.00 | |||
| Left | 1.10 | 0.572 | 1.457 | 0.703 |
| ASA | ||||
| 1 (reference) | 1.00 | |||
| 2 | 3.68 | 0.064 | 1.154 | 0.077 |
| 3 | 1.95 | 0.178 | 1.482 | 0.218 |
| 4 | 2.14 | 0.163 | 1.335 | 0.155 |
| Smoking | ||||
| Nonsmoker (reference) | 1.00 | |||
| Ex-smoker | 1.14 | 0.643 | 2.009 | 0.661 |
| Smoker | 1.24 | 0.564 | 2.728 | 0.591 |
| Domicile | ||||
| Own home (reference) | 1.00 | |||
| Residential home/fold/nursing home | 1.71 | 0.349 | 0.984 | 0.043 b |
| HB drop | ||||
| < 2 g/dL drop (reference) | 1.00 | |||
| > 2 g/dL drop | 1.29 | 0.485 | 1.249 | 0.299 |
| Admission glucose | ||||
| < 7.8 mmol/L (reference) | 1.00 | |||
| > 7.8 mmol/L | 1.18 | 0.661 | 2.095 | 0.579 |
| Discharge glucose | ||||
| < 7.8 mmol/L (reference) | 1.00 | |||
| > 7.8 mmol/L | 1.05 | 0.53 | 1.702 | 0.862 |
| Total protein | ||||
| > 64 (reference) | 1.00 | |||
| < 64 | 1.13 | 0.536 | 1.46 | 0.63 |
| Admission eGFR | ||||
| > 45 (Reference) | 1.00 | |||
| < 45 | 1.04 | 0.505 | 1.831 | 0.906 |
| Discharge eGFR | ||||
| > 45 (Reference) | 1.00 | |||
| < 45 | 1.04 | 0.472 | 1.96 | 0.914 |
| Transfusion status | ||||
| None (reference) | 1.00 | |||
| < 2 units | 1.12 | 0.312 | 4.008 | 0.864 |
| > 2 units | 1.85 | 0.486 | 7.048 | 0.367 |
aAbbreviations: ASA, American society for anesthesiologist’s score; DHS, dynamic hip screw; HB, haemoglobin; THR, total hip replacement.
b Highlights statistically significant variables.