Table 1 Characteristics of tumors included in the reference and validation dataset
Characteristic | Reference set | Validation set |
|---|---|---|
Sex (n – %) |  |  |
   Male | 60 (58%) | 14 (64%) |
   Female | 44 (42%) | 8 (36%) |
Location of primary tumor (n – %) |  |  |
   oral cavity | 87 (84%) | 7 (32%) |
   oropharynx | 17 (16%) | 7 (32%) |
   larynx | 0 (0%) | 8 (36%) |
Primary tumor size (n – %) |  |  |
Maximal diameter (cm.) | Â | Â |
   < 2.5 | 33 (32%) | 0 (0%) |
   2.5 – 5.0 | 49 (47%) | 13 (59%) |
   > 5.0 | 22 (21%) | 9 (41%) |
Nodal metastasis (n – %) |  |  |
   no (N0) | 49 (47%) | 11 (50%) |
   yes (N+) | 55 (53%) | 11 (50%) |