Table 3 Univariate analysis of hospitalization costs, in thousand RMB

Sex

0.713

 Male

43.39

21.28

72.49

 Female

42.24

24.91

69.13

Age (years)

0.437

 < 50

39.92

24.46

74.84

 50–60

42.84

21.08

72.41

 60–70

45.85

24.30

70.21

 ≥ 70

40.53

19.98

68.28

Occupation

0.411

 Farmer

45.38

23.51

65.18

 Worker

38.40

22.48

68.28

 Office worker and other

43.01

22.95

73.20

Education level

0.771

 Illiteracy

42.90

25.60

64.37

 Primary-middle school

42.40

22.05

71.60

 High school and above

44.36

22.93

71.10

BMI (kg/m²)

0.053

 18.5–23.9

44.73

25.58

72.93

 < 18.5

40.58

14.09

79.30

 ≥ 24

40.69

21.08

65.46

Pathological grading

0.803

 Well

52.67

31.98

75.44

 Moderate-poor

51.18

29.73

77.87

TNM stage

< 0.001

 I

28.06

18.51

39.56

 II

38.66

28.36

60.46

 III

52.71

31.39

75.22

 IV

65.00

42.30

90.42

Surgery

< 0.001

 No

49.09

28.62

74.40

 Yes

13.93

9.79

20.75

Adjuvant therapy

< 0.001

 No

36.15

19.80

62.29

 RT

58.58

32.43

82.83

 CT

36.27

16.90

63.66

 CRT

53.80

31.79

78.70

Length of stay (days)

< 0.001

 < 12

24.81

11.84

58.64

 12–19

27.84

18.03

49.09

 19–26

45.33

31.59

65.83

 ≥ 26

70.13

46.11

91.94

Tumor location

< 0.001

 Tongue

42.69

27.71

75.44

 Gum

67.91

39.71

95.02

 Floor of mouth

67.85

23.41

89.86

 Buccal mucosa

57.64

38.50

68.82

 Palate

40.16

20.13

59.24

 Others

29.85

17.55

54.95

Method of payment

0.540

 BMIUE

44.76

23.54

72.93

 BMIUR

35.34

21.06

70.29

 NRCMS

42.13

24.95

70.19

 Entire self-pay

39.11

15.66

78.91