Table 1.

Patients characteristics

Characteristics	Training group (n = 27)	Validation group(n = 29)
Primary site
Oropharynx	16 (59.3%)	20 (69.0%)
Larynx	2 (7.4%)	4 (13.8%)
Nasopharynx and Sinonasal	4 (14.8%)	2 (6.9%)
Other sites	5 (18.5%)	3 (10.3%)
Stage
I	3 (11.1%)	2 (6.9%)
II	3 (11.1%)	3 (10.3%)
III	5 (18.5%)	6 (20.7%)
IV	16 (59.3%)	17 (58.6%)
N/X	0 (0%)	1 (3.5%)
Primary Tumor Surgery
Yes	15	17
No	12	12