Table 2 Comparison of surgical performance between the laparoscopic and the robotic groups
| Â | Laparoscopic group | Robotic group | P value |
|---|---|---|---|
N = 41 | N = 30 | ||
Type of reconstruction | Â | Â | NS |
 Billroth II | 22 (53.7 %) | 21 (70.0 %) |  |
 Rou-en-Y | 19 (46.3 %) | 9 (30.0 %) | |
Lymph node dissection | Â | Â | NS |
 D1 + α/β | 4 (9.8 %) | 2 (6.6 %) |  |
 D2 | 37 (90.2 %) | 28 (93.3 %) | |
Mean operative time (min) (mean ± SEM) | 262.6 ± 8.6 | 312.6 ± 15.7 | <0.001 |
Blood loss (ml) (mean ± SEM) | 118.7 ± 10.7 | 99.5 ± 7.6 | NS |
Conversion to open surgery | 0 | 0 | NS |
Positive resection margin | 0 | 0 | NS |
No. of retrieved lymph nodes after D2 dissection (mean ± SEM) | 30.5 ± 2.0 | 39.1 ± 3.7 | 0.02 |