Table 4. Two-year endpoints by p16 status and neck treatment after chemoradiation.

		2-y Estimates (%)
Parameter	Patients (n)	LRF	PFS	OS
p16 positive
No neck dissection	130	11.2 (6.4-17.5)	75.3 (67.9-82.8)	86.9 (81.1-92.7)
Neck dissection with pCR	54	7.5 (2.4-16.7)	85.2 (75.7-94.7)	92.6 (85.6-99.6)
Neck dissection without pCR	15	20.0 (4.5-43.3)	73.3 (51.0-95.7)	86.7 (69.5-100.0)
Neck dissection with/without pCR	69	10.2 (4.5-18.8)	82.6 (73.7-91.6)	91.3 (84.7-98.0)
p16 negative
No neck dissection	63	31.1 (19.9-43.0)	47.6 (35.3-60.0)	57.1 (44.9-69.4)
Neck dissection with pCR	16	26.0 (7.5-49.6)	50.0 (25.5-74.5)	62.5 (38.8-86.2)
Neck dissection without pCR	14	75.0 (36.0-92.2)	14.3 (0.0-32.6)	50.0 (23.8-76.2)
Neck dissection with/without pCR	30	49.1 (29.2-66.3)	33.3 (16.5-50.2)	56.7 (38.9-74.4)

Abbreviations as in Table 3.