Table 1 The association between characteristics of the cohort and lymphatic metastasis in level IIB
Clinical characters | Number(%) | Lymph node positive number in level IIB(%) | Univariate P value | Multivariate P value |
|---|---|---|---|---|
Gender | ||||
 Female | 141(64.7) | 15(10.6) | 0.289 | – |
 Male | 77(35.3) | 12(15.6) |  |  |
Age | ||||
  < 55 | 198(90.8) | 22(11.1) | 0.072 | – |
  >  = 55 | 20(9.2) | 5(25.0) |  |  |
BMI | ||||
  <  = 23.9 | 129(59.2) | 16(12.4) | 0.992 | – |
  > 23.9 | 89(40.8) | 11(12.3) |  |  |
Tumor sides | ||||
 Unilateral cancer | 137(62.8) | 15(10.9) | 0.402 | – |
 Bilateral cancer | 81(37.2) | 12(14.8) |  |  |
Multifocality | ||||
 No | 152(69.7) | 19(12.5) | 0.938 | – |
 Yes | 66(30.3) | 8(12.1) |  |  |
T stage | Â | Â | 0.549 | Â |
 T1,2,3a | 207(95) | 25(12.1) |  | – |
 T3b,4a,4b | 11(5) | 2(18.2) |  |  |
Braf(20 cases) | Â | Â | 0.274 | Â |
 Negative | 7(35.0) | 0(0) |  | – |
 Positive | 13(65.0) | 2(15.4) |  |  |
PN1b | ||||
 Unilateral lymph node metastasis | 187(85.8) | 15(8.0) | 0.000 | 0.159 |
 Bilateral lymph node metastasis | 31(14.2) | 12(38.7) |  |  |
IIA Positive | Â | Â | 0.001 | Â |
 No | 111(50.9) | 6(5.4) |  | 0.010 |
 Yes | 107(49.1) | 21(19.6) |  |  |
IIB Positive | ||||
 No | 191(87.6) |  |  |  |
 Yes | 27(12.4) |  |  |  |
III Positive | Â | Â | 0.808 | Â |
 No | 44(20.2) | 5(11.4) |  |  |
 Yes | 173(79.4) | 22(12.7) |  | – |
IV Positive | Â | Â | 0.476 | Â |
 No | 61(28) | 6(9.8) |  | – |
 Yes | 157(72) | 21 |  |  |
V Positive | Â | Â | 0.186 | Â |
 No | 211(96.8) | 25(11.8) |  | – |
 Yes | 7(3.2) | 2(28.6) |  |  |