Case information | Groupa | P-value | ||
---|---|---|---|---|
 | I (n = 35) | II (n = 33) | III (n = 31) |  |
Age, years, mean ± SDb | 57.06 ± 10.63 | 59.79 ± 12.31 | 55.29 ± 10.60 | 0.274 |
Gender, n (%)c | Â | Â | Â | 0.953 |
 Male | 21 (60.0) | 21 (63.6) | 19 (61.3) |  |
 Female | 14 (40.0) | 12 (36.4) | 12 (38.7) |  |
Tumor classification, n (%)d | Â | Â | Â | 0.909 |
 T2 | 3 (8.6) | 3 (9.1) | 4 (12.9) |  |
 T3 | 16 (45.7) | 13 (39.4) | 12 (38.7) |  |
 T4 | 16 (45.7) | 17 (51.5) | 15 (48.4) |  |
UICC stage, n (%)d | Â | Â | Â | 0.0.996 |
 III | 11 (31.4) | 9 (27.3) | 9 (29.0) |  |
 IVa | 20 (57.1) | 20 (60.6) | 19 (61.3) |  |
 IVb | 4 (11.4) | 4 (12.1) | 3 (9.7) |  |
Tumor site, n (%)e | Â | Â | Â | 1.000 |
 Tongue | 13 (37.1) | 11 (33.3) | 12 (38.7) |  |
 Buccal membrane | 10 (28.6) | 10 (30.3) | 8 (25.8) |  |
 Gingiva | 6 (17.1) | 7 (21.2) | 7 (22.6) |  |
 Floor of mouth | 3 (8.6) | 2 (6.1) | 2 (6.5) |  |
 Palate | 1 (2.9) | 1 (3.0) | 0 (0.0) |  |
 Lips | 2 (5.7) | 2 (6.1) | 2 (6.5) |  |
Bax expression, n (%)e | Â | Â | Â | 0.796 |
 < 1% (-) | 30 (85.7) | 30 (90.9) | 27 (87.1) |  |
 10 to 25% (+) | 5 (14.3) | 3 (9.1) | 4 (12.9) |  |
Bcl-2 expression, n (%)d | Â | Â | Â | 0.241 |
 <10% (-) | 2 (5.7) | 5 (15.2) | 5 (16.1) |  |
 10 to 24% (+) | 4 (11.4) | 10 (30.3) | 4 (12.9) |  |
 25 to 49% (++) | 15 (42.9) | 9 (27.3) | 13 (41.9) |  |
 ≥50% (+++) | 14 (40.0) | 9 (27.3) | 9 (29.0) |  |
Tumor grading, n (%)d | Â | Â | Â | 0.956 |
 I | 5 (14.3) | 3 (9.1) | 2 (6.5) |  |
 II | 14 (40.0) | 15 (45.5) | 15 (48.4) |  |
 III | 16 (45.7) | 15 (45.5) | 14 (45.2) |  |