Table 3.
Comparison of the number of lymph node dissections and the rate of positive lymph nodes according to pathological T stage n (%)
|
Number of lymph node dissections |
P value1 |
Rate of positive lymph nodes |
P value2 | χ2 | |||
| Open | MIE | Open | MIE | ||||
| pTis | 18.3 ± 1.5 | 19.8 ± 1.3 | 0.2150 | 0 | 0 | ||
| pT1 | 19.3 ± 4.1 | 21.4 ± 3.8 | 0.0593 | 21 (5.0) | 50 (5.8) | 0.579 | 0.308 |
| pT2 | 20.2 ± 3.2 | 22.1 ± 6.6 | 0.0715 | 98 (10.1) | 190 (11.0) | 0.494 | 0.468 |
| pT3 | 20.3 ± 5.8 | 23.2 ± 4.1 | 0.1030 | 733 (16.3) | 32 (11.4) | 0.031 | 4.626 |
| pT4 | 21.5 ± 3.6 | 0 | 130 (17.8) | 0 | |||
| Total | 20.4 ± 3.8 | 21.1 ± 4.3 | 0.0944 | 982 (14.8) | 272 (9.5) | < 0.001 | 49.222 |
1
The t test;
2
The χ2 test. The rate of positive lymph nodes (pN+) = number of metastatic lymph nodes/number of removed lymph nodes. MIE: Minimally invasive esophagectomy.