Table 1.
Characteristics of patients undergoing surgery by distance categories
| Characteristic |
0–50 km (n = 6994) |
51–100 km (n = 612) |
101–150 km (n = 445) |
151–200 km (n = 680) |
201–250 km (n = 261) |
>250 km (n = 514) |
P |
| age (mean in years) | 52.7 | 54.7 | 54.9 | 54.5 | 55.7 | 54.6 | <0.001 |
| women (%) | 59.1 | 60.1 | 52.1 | 47.2 | 43.3 | 49.0 | <0.001 |
| urgent assessment (%) | 39.8 | 43.6 | 48.8 | 47.8 | 43.3 | 48.4 | <0.001 |
| major surgery (%) | 61.2 | 61.8 | 62.9 | 64.1 | 65.5 | 64.2 | 0.35 |
| chronic lung disease (%) | 12.2 | 14.5 | 11.7 | 13.4 | 14.2 | 11.9 | 0.46 |
| diabetes mellitus(%) | 5.0 | 3.8 | 4.7 | 7.1 | 4.2 | 7.4 | 0.02 |
| diabetes mellitus with complications (%) | 1.2 | 1.5 | 2.3 | 1.8 | 0.4 | 1.4 | 0.25 |
| mild liver disease (%) | 0.4 | 0.5 | 0 | 0.3 | 1.9 | 0.2 | 0.003 |
| moderate to severe liver disease (%) | 0.2 | 0 | 0 | 0 | 0.4 | 0.4 | 0.34 |
| neoplasm (%) | 14.1 | 17.3 | 18.4 | 16.2 | 16.1 | 20.0 | <0.001 |
| metastatic solid tumor (%) | 5.5 | 8.8 | 6.3 | 9.1 | 5.4 | 10.3 | <0.001 |
| hemiplegia (%) | 0.7 | 0.8 | 1.1 | 0.9 | 0 | 0.6 | 0.58 |
| chronic renal disease (%) | 0.5 | 0.5 | 0.5 | 1.6 | 0.4 | 0.2 | 0.008 |
| dementia (%) | 0.1 | 0.3 | 0 | 0.2 | 0 | 0.2 | 0.74 |
| rheumatologic disease (%) | 1.8 | 1.8 | 2.0 | 2.2 | 1.2 | 0.8 | 0.49 |
| peptic ulcer disease (%) | 0.7 | 0.5 | 0.5 | 0.6 | 1.2 | 0.8 | 0.89 |
| unstable angina (%) | 2.3 | 2.1 | 4.7 | 3.4 | 2.7 | 4.7 | 0.001 |
| hypertension (%) | 23.0 | 25.2 | 28.3 | 28.1 | 23.4 | 24.5 | 0.009 |
| congestive heart failure (%) | 2.6 | 3.8 | 3.8 | 5.4 | 5.8 | 5.6 | <0.001 |
| recent myocardial infarction (%) | 1.2 | 1.5 | 1.6 | 1.6 | 2.3 | 2.1 | 0.31 |
| old myocardial infarction (%) | 6.9 | 7.5 | 10.8 | 9.4 | 8.1 | 10.1 | 0.001 |
| old percutaneous transluminal coronary angioplasty (%) | 2.7 | 2.6 | 2.7 | 1.2 | 1.9 | 2.9 | 0.26 |
| old coronary artery bypass graft (%) | 1.8 | 1.6 | 1.6 | 2.4 | 0.8 | 1.8 | 0.70 |
| cerebrovascular disease (%) | 2.5 | 2.6 | 4.9 | 3.5 | 1.5 | 4.3 | 0.005 |
| peripheral vascular disease (%) | 3.4 | 3.3 | 2.9 | 4.9 | 4.6 | 4.3 | 0.26 |