Table 4 Associations between risk factors and occurrence of postoperative complications calculated with chi-square for linear trend
| Â | Dementia group (N, 120) | Non-dementia group (N, 120) | ||||
|---|---|---|---|---|---|---|
| Â | Occurrence of complication | Occurrence of complication | ||||
| Â | Yes | No | p value | Yes | No | p value |
|  | n = 100 | n = 20 |  | n = 89 | n = 31 |  |
Risk factor | ||||||
 Age ≥ 75 years | 81 (81) | 11 (55) | .012 | 47 (52.8) | 15 (48.4) | .67 |
 Congestive herart disease | 41 (41) | 5 (25) | .179 | 29 (32.6) | 3 (9.7) | .013 |
 Cardiac arrhythmia | 53 (53) | 5 (25) | .022 | 33 (37.1) | 6 (19.4) | .070 |
 Diabetes | 40 (40) | 7 (35) | .676 | 41 (46.1) | 6 (19.4) | .009 |
 Kidney disease | 37 (37) | 7 (35) | .865 | 26 (29.2) | 3 (9.7) | .029 |
 ASA classification > 2 | 82 (91.2) | 16 (84.2) | .364 | 76 (87.4) | 17 (56.7) | <.001 |
 Emergent operation | 56 (56) | 5 (25) | .011 | 48 (53.9) | 9 (29) | .017 |