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Comorbidities present preoperatively.
| Diseases | Absent | Present |
|---|---|---|
| Anemia | 173 (85.6%) | 29 (14.4%) |
| SAH | 73 (36.1%) | 129 (63.9%) |
| Heart diseases | 138 (68.3%) | 64 (31.7%) |
| Lung diseases | 182 (90.1%) | 20 (9.9%) |
| Rheumatoid arthritis | 197 (97.5%) | 5 (2.5%) |
| DM | 158 (78.2%) | 44 (21.8%) |
| Psychiatric disease | 155 (76.7%) | 47 (23.3%) |
| Upper airway infection | 185 (91.6%) | 17 (8.4%) |
| Urinary tract infection | 178 (88.1%) | 24 (11.9%) |
| Thyroid disease | 194 (96%) | 8 (4%) |
| Dementia | 172 (85.1%) | 30 (14.9%) |
