Patient characteristics

	Parameter	Number	Percent
Median Age, IQR		58, 52.5–66
Sex
	Female	2	8
	Male	22	92
Site
	Base of tongue	15	63
	Tonsil	4	17
	Supraglottic larynx	1	4
	Nasopharynx	2	8
	Oral cavity	1	4
	Unknown primary	1	4
HPV Status
	Positive	20	83
	Negative	2	8
	Not applicable/Unknown	2	8
Smoking
	< 10 pack-years	13	54
	> 10 pack-years	11	46
Concurrent chemotherapy
	Bolus cisplatin	11	46
	Weekly cisplatin	8	33
	Carboplatin-Taxol	2	8
	No chemotherapy	3	13
T-stage
	Tx	1	4
	T1	8	33
	T2	7	29
	T3	5	21
	T4	3	13
N-stage
	N0	5	21
	N1	4	17
	N2a	3	13
	N2b	10	42
	N2c	2	8
Stage
	I	2	8
	II	2	8
	III	3	13
	IV	17	71