Table 3 Correlation between the expression of PTEN, Ki-67 and risk grade in 84 GISTs
|  | Risk classification number (%) | P | Spearman’s correlation | ||||
|---|---|---|---|---|---|---|---|
Very low | Low | Intermediate | High | R s | P | ||
PTEN |  |  |  |  | 0.001* | −0.318 | 0.003 |
  (−) | 2 (2.4) | 3 (3.6) | 1 (1.2) | 5 (6.0) |  |  |  |
  (+) | – | 4 (4.8) | 7 (8.3) | 22 (26.2) |  |  |  |
  (++) | 3 (3.6) | 17 (20.2) | 8 (9.5) | 9 (10.7) |  |  |  |
  (+++) | – | 2 (2.4) | 1 (1.2) | – |  |  |  |
Ki-67 labeling index | Â | Â | Â | Â | <0.001* | 0.434 | <0.001 |
  ≤1% | 5 (6.0) | 15 (17.9) | 8 (9.5) | 7 (8.3) |  |  |  |
  >1% | – | 11 (13.1) | 9 (10.7) | 29 (34.5) |  |  |  |