Table 1 Demographic data of the participants

Sex

Male

93

(78)

Female

27

(23)

Age

≤44

10

(8)

45 ~ 64

78

(65)

≥65

30

(25)

Unknown

2

(2)

Education Level

Less than high school

43

(36)

High school

42

(35)

Collage or more

35

(29)

Major diagnosis

Lip and oral cavity cancer

47

(39)

Nasopharyngeal or nasal Cavity or laryngeal cancer

57

(48)

Tonsil or parotid gland cancer

12

(10)

Esophageal cancer

3

(3)

Bronchoalveolar cancer

1

(1)

DMFT

≤12

38

(32)

> 12

82

(68)

Year after radiation

≤4

45

(38)

> 4

60

(50)

Either USF or SSF

Substandard (<  0.1, <  0.5)

19

(14)

Both USF and SSF

Standard (≥ 0.1, ≥ 0.5)

6

(5)

Substandard (<  0.1, <  0.5)

95

(79)

SSF ≥ 0.5

PSQI < 5

5

(4%)

PSQI ≥ 5

3

(3%)

SSF <  0.5

PSQI < 5

46

(38%)

PSQI ≥ 5

66

(55%)