Table I. Clinopathological characteristics of patients for tissue IHC studies.

	Total (n = 79)	Nonrecurrence (n = 39)	Recurrence (n = 40)	p value
Age (median, range)	65 (44–92)	68 (44–92)	62 (47–88)	0.15
Gender (M/F)	66/13	33/6	33/7	0.80
Sub-site
Hypopharynx	23	9	14	0.24
Larynx	56	30	26
Stage
I/II/III	36	18	18	0.92
IVA/IVB	43	21	22
Treatment
Radiotherapy alone	53	27	26	0.80
Chemoradiotherapy	26	12	14