Table 4 Correlations between patient factors and survival in treatment-refusing colorectal cancer patients

Sex

  Female (reference group)

-

-

-

-

  Male

1.03

0.91

1.17

0.650

Age at diagnosis, years

  ≤44 (reference group)

-

-

-

-

  45–54

0.79

0.59

1.07

0.132

  55–64

0.93

0.69

1.25

0.630

  65–74

0.96

0.72

1.28

0.769

  ≥75

1.59

1.20

2.09

0.001*

Urbanization level of residence location

  Level 1 (highest; reference group)

-

-

-

-

  Level 2

0.89

0.75

1.05

0.158

  Level 3

1.06

0.87

1.30

0.578

  Level 4

1.04

0.85

1.28

0.692

  Level 5

0.89

0.63

1.26

0.510

  Level 6

0.90

0.68

1.18

0.433

  Level 7 (lowest)

1.27

0.95

1.69

0.115

Aboriginal status

  No (reference group)

-

-

-

-

  Yes

0.33

0.13

0.81

0.015*

Insured monthly salary, NTD

  ≤17,280 (reference group)

-

-

-

-

  Insured dependent

0.98

0.75

1.28

0.889

  17,281–22,800

0.92

0.79

1.08

0.330

  ≥22,801

0.74

0.60

0.92

0.007*

Low-income household status

  No (reference group)

-

-

-

-

  Yes

1.71

1.07

2.72

0.024*

Other catastrophic illnesses or injuries

  No (reference group)

-

-

-

-

  Yes

1.26

0.98

1.60

0.070

Charlson Comorbidity Index (CCI)

  ≤3 (reference group)

-

-

-

-

  4–6

7.31

6.54

8.16

<0.001*

  ≥7

15.96

14.43

17.65

<0.001*

Cancer stage

  Stage 0 (reference group)

-

-

-

-

  Stage I

1.48

0.92

2.38

0.110

  Stage II

2.99

1.91

4.67

<0.001*

  Stage III

3.58

2.35

5.46

<0.001*

  Stage IV

11.33

7.55

17.00

<0.001*