Table II.
Grade | Immunonegative cases, n (%) | Immunopositive cases, n (%)
|
|||
---|---|---|---|---|---|
+ | ++ | +++ | Total | ||
I | 7 (77.8) | 2 (22.2) | 0 (0.0) | 0 (0.0) | 2 (22.2) |
II | 31 (55.4) | 15 (26.8) | 6 (10.7) | 4 (7.1) | 25 (44.6) |
III | 15 (28.8) | 8 (15.4) | 17 (32.7) | 12 (23.1) | 37 (71.2) |
IV | 4 (11.4) | 3 (8.6) | 10 (28.6) | 18 (51.4) | 31 (88.6) |
P=0.021, grade I and II vs. grade III and IV (χ2 test). EGFR, epidermal growth factor receptor.