Table 1 Demographic and clinical characteristics (n = 184)

Age

Median [IQR]

(Range)

63.0

[11]

(26–78)

64.0

[15]

(26–90)

0.344^Ϯ

Sex

Male

46

94

0.356*

Female

11

33

Ethnicity

Malay

12

27

 < 0.001**

Chinese

31

32

Indian

8

57

Others

6

11

^aHistory of tobacco use

No

19

40

1.000*

Yes (Current/Former)

27

60

Not available

11

27

^aHistory of alcohol intake

No

29

59

1.000*

Yes (Current/Former)

14

29

Not available

14

39

^aHistory of betel quid use

No

35

59

 < 0.001*

Yes (Current/Former)

0

23

Not available

22

45

Site of tumour

Tonsil

33

44

0.002**

Base of tongue

13

43

Soft palate & uvula

9

15

Oropharynx Not Otherwise Specified (NOS)

2

25

TNM staging

Based on 7th edition of AJCC staging

Stage I

0

3

0.789**

Stage II

3

8

Stage III

11

22

Stage IVA

31

58

Stage IVB

7

18

Stage IVC

5

18