Table 1.

Patient characteristics of all included patients.

	Training Cohort (n=28)	Validation Cohort (n=12)
Tumor location
Oropharynx	19 (68%)	6 (50%)
Hypopharynx	5 (18%)	4 (33%)
Larynx	3 (11%)	0 (0%)
Oral Cavity	1 (3%)	2 (17%)
Time to recurrence (median [range] months)	7 [2 - 59]	8 [4 -24]
T stage
1	1 (3%)	0 (0%)
2	5 (18%)	0 (0%)
3	7 (25%)	3 (25%)
4	15 (54%)	9 (75%)
N stage
0	5 (18%)	2 (17%)
1	4 (14%)	1 (8%)
2a	0 (0%)	1 (8%)
2b	7 (25%)	2 (17%)
2c	12 (43%)	6 (50%)
3	0 (0%)	0 (0%)
HPV status
Positive	3 (11%)	3 (25%)
Negative	12 (43%)	8 (67%)
Unknown	13 (46%)	1 (8%)