Table 2.
Comparison of Total Numbers of NK Cells Across Different Pathological Stages at Day 1 Before Surgery or at Day 7 After Surgery.a
| Surgery status | Dukes A | Dukes B | Dukes C | P Value by chi-square Test |
|---|---|---|---|---|
| Before laparoscopic | 303 | 244 | 233 | .824 |
| After laparoscopic | 310 | 239 | 251 | |
| Before open surgery | 299 | 250 | 240 | .0089 |
| After open surgery | 291 | 191 | 188 |
Abbreviation: NK cells, natural killer cells.
a The data were presented as mean values (cell numbers/µL in blood) for each group of patients; P value was analyzed by chi-square test within the same surgery groups.