Table 1. Spearman correlation between activin A immunohistochemical expression and clinicopathological variables.
| Variables | Correlation Coefficient | p value |
|---|---|---|
| Age | 0.025 | 0.79 |
| Gender | -0.013 | 0.89 |
| Ethnic group | -0.017 | 0.85 |
| Smoking habit | -0.052 | 0.58 |
| Drinking habit | -0.067 | 0.47 |
| Tumor site | 0.075 | 0.42 |
| T stage | 0.082 | 0.38 |
| N stage | 0.216 | 0.02 |
| Treatment | 0.111 | 0.23 |
| Histopathological grade | 0.207 | 0.03 |
| Surgical margin status | -0.001 | 0.98 |
| Vascular invasion | -0.023 | 0.81 |
| Perineural invasion | 0.037 | 0.69 |
| Recurrence | 0.026 | 0.77 |