Table 2.
Association between selected preoperative variables and postoperative Mortality. Univariate analysis
| No. of patients | 30-day postoperative mortality (%) | p value | |
|---|---|---|---|
| Age < 0.0001* | |||
| 18–65 | 413 | 28 (6.8) | |
| 66–70 | 159 | 30 (18.9) | |
| 71–75 | 133 | 29 (21.8) | |
| 76–80 | 127 | 37 (29.1) | |
| > 80 | 252 | 91 (36.1) | |
| Sepsis score | < 0.0001** | ||
| 0–2 | 1004 | 170 (16.9) | |
| 3–4 | 80 | 45 (56.3) | |
| ECOG score | < 0.001* | ||
| 0 | 522 | 36 (6.9) | |
| 1 | 313 | 69 (22.0) | |
| 2 | 148 | 58( 39.2) | |
| 3 | 84 | 41 (48.8) | |
| 4 | 17 | 11 (64.7) | |
| ASA | < 0.0001* | ||
| 1 | 141 | 2 (1.4) | |
| 2 | 454 | 30 (6.6) | |
| 3 | 381 | 115( 30.2) | |
| 4–5 | 108 | 68 (63.0) | |
| Cardiovascular morbidity | < 0.0001** | ||
| Yes | 540 | 149 (27.6) | |
| No | 544 | 66 (12.1) | |
| Albumin(g/L) | < 0.0001** | ||
| Low (< 36 g/L) | 506 | 148 (29.2) | |
| Normal (36–48 g/L) | 385 | 45 (11.7) | |
| High (> 48 g/L) | 79 | 1 (1.2) | |
| Indication for surgery | < 0.0001** | ||
| Obstruction | 494 | 68 (13.7) | |
| Other | 550 | 136 (24.7) | |
*Pearson’s chi-squared test, **Pearson’s chi-squared test with Yates’ continuity correction
Values in parentheses are percentages unless indicated otherwise; *values are median (i.q.r). ECOG Eastern Cooperative Oncology Group Performance Status Score, ASA American Society of Anaesthesiologists. Cardiovascular comorbidity: Hypertension, Atrial fibrillation, Heart failure, previous percutaneous coronary intervention, cardiac surgery, or angina