| PTEN Baseline | PTEN 12 months postoperative | Total | ||
| Negative | Positive | |||
| Negative | No. | 16 | 27 | 43 |
| % | 20.8% | 35.1% | 55.8% | |
| Positive | No. | 8 | 26 | 34 |
| % | 10.4% | 33.8% | 44.2% | |
| Total | No. | 24 | 53 | 77 |
| % | 31.2% | 68.8% | 100% | |