Table 2.
Pathological findings in the OS and LS groups.
| Variables | OS group (n = 32) | LS group (n = 16) | P value |
|---|---|---|---|
| Bismuth type, n (%) | 0.838 | ||
| IIIa | 15 (46.88) | 7 (43.75) | |
| IIIb | 17(53.13) | 9 (56.25) | |
| Tumor diameter [mean ± SD,cm] | 2.66 ± 1.04 | 2.58 ± 1.13 | 0.697 |
| Degree of differentiation, n (%) | 0.402 | ||
| Well-differentiated | 5 (15.63) | 1 (6.25) | |
| Moderately-differentiated | 12 (37.5) | 9 (56.25) | |
| Poorly-differentiated | 15 (46.88) | 6 (37.5) | |
| TNM stage, n (%) | 0.956 | ||
| I | 1 (3.12) | 1 (6.25) | |
| II | 8 (25) | 4 (25) | |
| IIIA | 6 (15.79) | 2 (12.5) | |
| IIIB | 6 (18.75) | 52(12.5) | |
| IIIC | 7 (21.88) | 4 (25) | |
| IVA | 4 (12.5) | 3 (18.75) | |
| Perineural involvement, n (%) | 11 (34.38) | 6 (37.5) | 0.831 |
| Microvascular invasion, n (%) | 1 (3.12) | 1 (6.25) | 0.798* |
| Lymph node involvement, n (%) | |||
| Total number [median (q1-q3)] | 6 (5 - 7) | 7 (5 - 8) | 0.146 |
| Positive rate | 7 (21.88) | 7 (43.75) | 0.217* |
Data are presented as standard deviation (mean ± SD) or as median (interquartile range). * Fisher’s exact test. OS, open surgery; LS, laparoscopic surgery.