Table 1 Clinical characteristics
Age (years) | 66.2 ± 12.2 (34 to 89) | |
Sex (male: female) | 61:16 | |
Body mass index (kg/m2) | 22.4 ± 2.9 (16.5 to 29.3) | |
American Society of Anesthesiology | 1 | 17 (22%) |
| Â | 2 | 60 (78%) |
Concurrent illness* | No | 40 (52%) |
| Â | Yes | 37 (48%) |
Cardiovascular disease | 23 | |
Diabetes mellitus | 4 | |
Respiratory disease | 2 | |
Liver disease | 1 | |
Other operation | 13 | |
Brain disorder | 3 | |
Extent of lymph-node dissection | Â | |
D1+ | 49 (64%) | |
D2 | 28 (36%) | |