Table 2 P-STAT3 expression and clinicopathologic features in HNSCC
Characteristic | Case number | P-STAT3 staining score | Non-parametric tests value | P value | |
|---|---|---|---|---|---|
Mean | Std. error | ||||
Gender | |||||
 Male | 47 | 53.0 | 8.08 | Z = −1.536 | 0.125 |
 Female | 39 | 62.0 | 8.81 |  |  |
Smoking history | |||||
 Yes | 30 | 58.0 | 4.52 | Z = −0.218 | 0.827 |
 No | 56 | 57.0 | 3.68 |  |  |
Drinking history | |||||
 Yes | 22 | 56.0 | 5.51 | Z = −0.437 | 0.662 |
 No | 64 | 57.0 | 3.35 |  |  |
Lymph node metastasis | |||||
 Yes | 56 | 58.0 | 4.99 | Z = −0.889 | 0.374 |
 No | 30 | 56.0 | 3.49 |  |  |
T stage | |||||
 T1 | 22 | 57.0 | 4.28 | χ2 = 3.011 | 0.390 |
 T2 | 36 | 62.0 | 4.47 |  |  |
 T3 | 13 | 54.0 | 8.27 |  |  |
 T4 | 15 | 48.0 | 7.85 |  |  |
TNM stage | |||||
 I | 20 | 58.0 | 4.75 | χ2 = 0.415 | 0.937 |
 II | 24 | 58.0 | 6.12 |  |  |
 III | 21 | 60.0 | 5.52 |  |  |
 IV | 21 | 53.0 | 6.34 |  |  |
Degree of tumor differentiation | |||||
 Well | 33 | 47.0 | 4.57 | χ2 = 14.376 | <0.01* |
 Moderately | 45 | 60.0 | 3.76 |  |  |
 Poorly | 8 | 81.0 | 4.55 |  |  |