Table 3 Comparison of patient characteristics between non-OCC group and OCC group
| Â | Non-OCC group (n = 40) | OCC group (n = 50) | p value |
|---|---|---|---|
Primary site | |||
| Â | Hypopharyngeal, 27 (68%) | Tongue, 42 (84%) | Â |
Oropharyngeal, 9 (22%) | Oral floor, 5 (10%) | Â | |
Laryngeal, 4 (10%) | Gingival, 3 (6%) | Â | |
Age, years | Â | Â | 0.93 |
 Median (range) | 68 (43–87) | 65 (27–88) |  |
Sex | Â | Â | 0.027 |
 Male | 37 (93%) | 37 (74%) |  |
 Female | 3 (8%) | 13 (26%) |  |
Stage | Â | Â | 0.002 |
 II | 0 (0%) | 1 (2%) |  |
 III | 0 (0%) | 10 (20%) |  |
 IVa | 39 (98%) | 39 (78%) |  |
 IVb | 1 (2%) | 0 (0%) |  |
T classification | Â | Â | 0.003 |
 T1 | 1 (2%) | 12 (24%) |  |
 T2 | 8 (20%) | 12 (24%) |  |
 T3 | 8 (20%) | 13 (26%) |  |
 T4 | 23 (58%) | 13 (26%) |  |
N classification | Â | Â | 0.24 |
 N0 | 2 (5%) | 5 (10%) |  |
 N1 | 3 (7%) | 9 (18%) |  |
 N2a | 2 (5%) | 0 (0%) |  |
 N2b | 21 (53%) | 26 (52%) |  |
 N2c | 11 (27%) | 10 (20%) |  |
 N3 | 1 (3%) | 0 (0%) |  |
Extracapsular extension | Â | Â | 0.016 |
 Yes | 3 (7%) | 14 (28%) |  |
 No | 37 (93%) | 36 (72%) |  |
Positive surgical margin | Â | Â | > 0.999 |
 Yes | 4 (10%) | 4 (8%) |  |
 No | 36 (90%) | 46 (92%) |  |