Relation of p53 staining with tumour recurrence
| p53 score | Non-recurrence | Recurrence | Total |
| − | 22 | 7 | 29 |
| + | 2 | 3 | 5 |
| ++ | 10 | 1 | 11 |
| +++ | 17 | 4 | 21 |
| Total | 51 | 15 | 66 |
χ2 3 = 5.3, p > 0.1.
−, < 10% positive tumour cells; +, 10–25% positive tumour cells; ++, 26–50% positive tumour cells; +++, > 50% positive tumour cells.