Table 5 Associations between risk factors and in-hospital mortality calculated with chi-square for linear trend
| Â | Dementia group (N, 120) | Non-dementia group (N, 120) | ||||
|---|---|---|---|---|---|---|
| Â | Outcome | Outcome | ||||
| Â | Survived | Died | Â | Survived | Died | Â |
|  | n = 86 | n = 34 | p value | n = 96 | n = 24 | p value |
Risk factor | ||||||
 Age ≥ 75 years | 61 (70.9)) | 31 (91.2) | .018 | 47 (49) | 15 (62.5) | .235 |
 Cardiac arrhythmia | 39 (45.3) | 19 (55.9) | .298 | 27 (28.1) | 12 (50) | .041 |
 ASA classification > 2 | 68 (87.2) | 30 (98.3) | .134 | 69 (74.2) | 24 (100) | .005 |
 Emergent operation | 38 (44.2) | 23 (67.6) | .021 | 40 (41.7) | 17 (70.8) | .010 |
 Surgical site infection | 40 (46.5) | 17 (50) | .730 | 27 (28.1) | 12 (50) | .041 |
 Sepsis | 3 (3.5) | 18 (52.9) | <.001 | 4 (4.2) | 20 (83.3) | <.001 |
 Pneumonia | 17 (19.8) | 15 (44.1) | .007 | 4 (4.2) | 6 (25) | .001 |
 Lung failure | 8 (9.3) | 20 (58.8) | <.001 | 1 (1) | 22 (91.7) | <.001 |
 Pleural effusion | 13 (15.1) | 8 (23.5) | .274 | 8 (8.3) | 8 (33.3) | .001 |
 Pulmonary complication | 21 (24.4) | 28 (82.4) | <.001 | 12 (12.5) | 21 (87.5) | <.001 |
 Cardiovascular complication | 7 (8.1) | 10 (29.4) | .003 | 8 (8.3) | 11 (45.8) | <.001 |
 Acute renal failure | 4 (4.7) | 18 (52.9) | <.001 | 3 (3.1) | 20 (83.3) | <.001 |
 Postoperative delirium | 21 (24.4) | 18 (52.9) | .003 | 0 (0) | 3 (12.5) | <.001 |