Table 3. Adjusted hazard ratios of individual age-adjusted Charlson comorbidity index score for postoperative in-hospital mortality.
| Adjusted HRa | 95% CI | P-value | |
|---|---|---|---|
| Overall | 1.2% | ||
| ACCI score 0–1 | 1 | ||
| 2–3 | 1.40 | 1.22–1.59 | < 0.001 |
| 4–5 | 2.34 | 2.05–2.67 | < 0.001 |
| ≥ 6 | 2.65 | 2.31–3.04 | < 0.001 |
| Esophagus | 1.5% | ||
| ACCI score 0–1 | 1 | ||
| 2–3 | 1.33 | 0.97–1.83 | 0.080 |
| 4–5 | 2.07 | 1.49–2.87 | < 0.001 |
| ≥ 6 | 2.05 | 1.45–2.92 | < 0.001 |
| Stomach | 1.2% | ||
| ACCI score 0–1 | 1 | ||
| 2–3 | 1.08 | 0.88–1.32 | 0.481 |
| 4–5 | 1.63 | 1.32–2.01 | < 0.001 |
| ≥ 6 | 2.00 | 1.60–2.49 | < 0.001 |
| Colorectum | 0.9% | ||
| ACCI score 0–1 | 1 | ||
| 2–3 | 1.13 | 0.89–1.43 | 0.310 |
| 4–5 | 2.20 | 1.75–2.76 | < 0.001 |
| ≥ 6 | 2.54 | 2.02–3.21 | < 0.001 |
| Liver and gallbladder | 1.2% | ||
| ACCI score 0–1 | 1 | ||
| 2–3 | 2.15 | 1.60–2.89 | < 0.001 |
| 4–5 | 3.64 | 2.70–4.91 | < 0.001 |
| ≥ 6 | 4.57 | 3.37–6.20 | < 0.001 |
| Pancreas | 2.2% | ||
| ACCI score 0–1 | 1 | ||
| 2–3 | 1.56 | 1.05–2.31 | 0.029 |
| 4–5 | 2.40 | 1.60–3.59 | < 0.001 |
| ≥ 6 | 2.58 | 1.68–3.97 | < 0.001 |
ACCI: age-adjusted Charlson comorbidity index. aAdjust for sex, caseload of each healthcare institution, resection type of surgery, and anesthesia methods.