Table 2. Logistic regression model for predicting delirium.
| Total population | Propensity-Matched population | |||||
|---|---|---|---|---|---|---|
| Univariate | Multivariate | Univariate | ||||
| OR (95% CI) | p-value | Adjusted OR (95% CI) | p-value | OR (95% CI) | p-value | |
| Age (years) | 1.05 (1.03–1.07) | <0.001 | 1.04 (1.02–1.07) | <0.001 | 1.08 (1.02–1.14) | 0.005 |
| Male | 0.89 (0.54–1.46) | 0.63 | 0.71 (0.23–2.25) | 0.57 | ||
| Current smoker | 0.84 (0.54–1.29) | 0.42 | 0.96 (0.60–1.54) | 0.87 | 0.85 (0.38–1.89) | 0.68 |
| History of alcohol | 0.83 (0.57–1.19) | 0.31 | 0.98 (0.66–1.47) | 0.94 | 0.73 (0.34–1.60) | 0.44 |
| Living without spouse | 1.10 (0.66–1.83) | 0.71 | 1.20 (0.37–3.93) | 0.763 | ||
| Hypertension | 1.38 (0.90–2.10) | 0.135 | 0.94 (0.57–1.57) | 0.83 | 2.40 (0.85–6.81) | 0.100 |
| Diabetes mellitus | 1.23 (0.85–1.78) | 0.27 | 0.92 (0.59–1.43) | 0.72 | 1.33 (0.56–3.16) | 0.51 |
| COPD | 1.17 (0.62–2.21) | 0.63 | 1.18 (0.59–2.36) | 0.63 | 0.80 (0.21–2.98) | 0.74 |
| Chronic renal failure | 1.75 (1.11–2.76) | 0.016 | 1.03 (0.61–1.74) | 0.92 | 2.60 (0.93–7.29) | 0.069 |
| Heart failure | 1.71 (0.78–3.76) | 0.181 | 1.34 (0.56–3.21) | 0.51 | 2.00 (0.37–10.92) | 0.42 |
| Preoperative benzodiazepine | 6.69 (3.06–14.64) | <0.001 | N/A | |||
| Preoperative beta-blocker | 1.12 (0.72–1.73) | 0.62 | 1.32 (0.77–2.25) | 0.31 | N/A | |
| Preoperative statin | 0.73 (0.50–1.08) | 0.113 | 0.54 (0.33–0.87) | 0.011 | 0.59 (0.34–1.02) | 0.060 |
| General anesthesia | 1.12 (0.44–2.88) | 0.81 | 1.36 (0.48–3.87) | 0.57 | N/A | |
| ASA score≥3 | 2.76 (1.89–4.03) | <0.001 | 2.30 (1.50–3.51) | <0.001 | 2.20 (1.04–4.65) | 0.039 |
| Emergency surgery | 2.42 (1.51–3.88) | <0.001 | 2.05 (1.22–3.43) | 0.006 | 5.00 (1.10–22.82) | 0.038 |
| Type of surgery | ||||||
| EVAR | 1 (reference) | 1 (reference) | 1 (reference) | |||
| Aortic occlusive disease | 2.61 (0.94–7.21) | 0.065 | 2.19 (0.74–6.54) | 0.159 | 1.49 (0.17–12.84) | 0.72 |
| Lower extremity bypass | 2.48 (1.24–4.96) | 0.010 | 2.26 (1.06–4.81) | 0.034 | 3.01 (0.75–12.09) | 0.119 |
| Open aortic aneurysm | 2.53 (1.22–5.28) | 0.013 | 1.43 (0.64–3.19) | 0.39 | 2.80 (0.67–11.65) | 0.158 |
| Amputation surgery | 2.71 (1.24–5.91) | 0.012 | 6.10 (2.47–15.1) | <0.001 | 3.28 (0.72–15.01) | 0.126 |
| Operative time (> 3hrs) | 1.90 (1.28–2.82) | 0.001 | 2.36 (1.37–4.06) | 0.002 | 1.42 (0.68–2.97) | 0.36 |
| Anemia (Hemoglobin <10) | 1.95 (1.31–2.89) | 0.001 | 1.41 (0.91–2.20) | 0.125 | 2.50 (0.78–7.97) | 0.121 |
N/A, not available