Table 1 Patient characteristics (n = 47)

Gender

 Male

39

 Female

8

Age (mean, SD, range)

63.13, 11.3, 24–88

Tumour site

 Base of tongue

8

 Tongue

2

 Nasal cavity

1

 Floor of mouth

2

 Parotid gland

10

 Tonsil

19

 Oropharynx/hypoparynx

1

 Larynx

1

 Lymph, secondary tumour

3

Tumour size

 Tl

8

 T2

20

 T3

5

 T4

5

 Missing data

9

External beam radiotherapy (RT)

 3D conformal radiotherapy (3DCRT)

24

 Intensity-modulated radiotherapy (1MRT)

23

 Concomitant chemotherapy^a

27

 No chemotherapy

20