Table 4 Clinicopathological characteristics of patients according to ypN status (n = 132)
Parameter | ypNx,% | ypN0,% | ypNpos,% | P-value | P-value, ypNx vs ypN0 |
|---|---|---|---|---|---|
Number of patients | 11(8.3) | 83(62.9) | 38(28.8) | Â | Â |
Mean age(yr) ± STD | 66.9 ± 9.13 | 59.5 ± 8.80 | 58.5 ± 11.4 | 0.434 | 0.725 |
Primary tumor location | Â | Â | Â | 0.514 | 0.680 |
  Mid | 11(100.0) | 70(84.3) | 28(73.7) |  |  |
  Lower | 0(0.0) | 13(15.7) | 10(26.3) |  |  |
Pretreatment CEA(ng/mL) | 5.59 ± 5.98 | 4.02 ± 5.67 | 7.36 ± 17.73 | 0.229 | 0.926 |
Cell differentiation | Â | Â | Â | 0.765 | 0.443 |
  Well | 0(0.0) | 7(8.4) | 5(13.2) |  |  |
  Moderate | 8(72.7) | 69(83.1) | 27(71.1) |  |  |
  Poorly | 3(27.3) | 7(8.5) | 6(15.7) |  |  |
Perineural invasion | 3(27.3) | 3(3.6) | 7(18.4) | 0.102 | 0.288 |
Lymphovascular invasion | 3(27.3) | 9(10.8) | 18(47.4) | 0.001 | 0.435 |
Body mass index | 22.18 ± 1.57 | 23.39 ± 3.14 | 22.86 ± 2.61 | 0.723 | 0.091 |
Retrieved nodes | - | 13.45 ± 7.59 | 17.9 ± 6.87 | 0.720 | 0.047 |