Table 1: Characteristics of patients.
| B-I (n = 147) | B-II (n = 17) | R-Y (n = 103) | p-value | |
| Gender (male/female) | 98/49 | 5-Dec | 67/36 | 0.83 |
| Age (median) | 66 (27-88) | 76 (62-89) | 69 (22-90) | 0.018 |
| Stage IA | 117 | 3 | 72 | < 0.01 |
| IB | 12 | 6 | 15 | |
| IIA | 9 | 3 | 8 | |
| IIB | 9 | 5 | 8 | |
| Cholecystectomy | 115 | 16 | 74 | 0.11 |
| Cholecystolithiasis | 15 | 2 | 12 | 0.93 |
| Open laparotomy | 128 | 16 | 84 | 0.27 |
| Laparoscopic surgery | 19 | 1 | 19 | |
| Range of lymph node dissection | p < 0.01 | |||
| D1 | 20 | 1 | 6 | |
| D1+ | 85 | 7 | 46 | |
| D2 | 42 | 9 | 51 | |
| Observation period (days) | 2708 (305-4450） | 2569 (530-4450) | 1540 (57-4424) | p < 0.01 |