Table 1. General characteristics of the study patients.

Characteristic	N
Age, years (mean ± standard deviation)	52 ± 10
Sex
Male	116
Female	8
Tumor subsite
Oropharynx	63
Hypopharynx	61
T status
T1	5
T2	26
T3	20
T4a	65
T4b	8
N status
N0	15
N1	12
N2b	60
N2c	22
N3	15
Disease stage
III	9
IVA	87
IVB	28
Smoking
Yes	94
No	30
Alcohol drinking
Yes	80
No	44
Betel quid chewing
Yes	62
No	62

Data are given as counts unless otherwise indicated.