Table 4. Risk factors for postoperative delirium by univariate analysis and multivariate analysis.
| Univariate analysis | Multivariate analysis | |||||
|---|---|---|---|---|---|---|
| Parameters | Odds ratio | 95% CI | p | Odds ratio | 95% CI | p |
| Age | 1.120 | 1.069–1.174 | < 0.001 | 1.133 | 1.071–1.200 | < 0.001 |
| BMI | 0.866 | 0.775–0.967 | 0.011 | - | - | - |
| Preoperative albumin (g/dL) | 0.340 | 0.174–0.665 | 0.002 | - | - | - |
| Operative time (min) | 1.008 | 1.004–1.013 | 0.001 | 1.009 | 1.000–1.017 | 0.038 |
| Postoperative hemoglobin (g/dL) | 0.629 | 0.510–0.775 | < 0.001 | 0.777 | 0.613–0.983 | 0.036 |
| Lung disease | 3.782 | 1.293–11.062 | 0.015 | - | - | - |
| Hypnotic drug use | 3.622 | 1.561–8.404 | 0.003 | 3.074 | 1.045–9.039 | 0.041 |
| ≥ 3 segmental hepatectomy | 2.259 | 1.113–4.584 | 0.024 | - | - | - |
| Infection complication | 5.338 | 2.037–13.987 | 0.001 | - | - | - |
BMI: Body Mass Index.