Table 3 Results of subgroup analysis stratified by independent variables

Age

 19–29

1.00

1.19

(0.72

-

1.96)

1.00

1.80

(0.93

-

3.52)

 30–39

1.00

0.81

(0.50

-

1.32)

1.00

2.10

(1.02

-

4.31)

 40–49

1.00

1.15

(0.78

-

1.70)

1.00

2.07

(1.02

-

4.18)

 50–59

1.00

1.38

(0.91

-

2.09)

1.00

0.73

(0.25

-

2.14)

 60-

1.00

1.79

(1.22

-

2.62)

1.00

1.53

(0.66

-

3.55)

Marital status

 Married

1.00

1.25

(1.00

-

1.57)

1.00

1.48

(0.88

-

2.51)

 Divorced, Separated

1.00

1.17

(0.78

-

1.74)

1.00

2.12

(1.20

-

3.73)

 Single, Widow

1.00

3.44

(0.50

-

23.77)

1.00

8.93

(1.71

-

46.62)

Educational level

 Middle school or below

1.00

1.84

(1.14

-

2.95)

1.00

2.12

(1.08

-

4.17)

 High school

1.00

1.22

(0.89

-

1.67)

1.00

1.83

(1.12

-

2.98)

 University or beyond

1.00

1.19

(0.91

-

1.56)

1.00

1.72

(0.94

-

3.14)

Region

 Metropolitan

1.00

1.19

(0.89

-

1.57)

1.00

1.28

(0.83

-

1.97)

 Urban

1.00

1.25

(0.92

-

1.71)

1.00

2.33

(1.26

-

4.32)

 Rural

1.00

2.00

(1.38

-

2.92)

1.00

4.37

(1.70

-

11.25)

Occupational categories

 White

1.00

1.12

(0.80

-

1.56)

1.00

1.87

(0.92

-

3.81)

 Pink

1.00

1.26

(0.71

-

2.24)

1.00

2.42

(1.20

-

4.88)

 Blue

1.00

1.13

(0.80

-

1.58)

1.00

3.55

(1.56

-

8.06)

 Inoccupation

1.00

1.87

(1.19

-

2.93)

1.00

1.68

(0.95

-

2.98)

Household generation composition

 1st generation

1.00

1.59

(1.07

-

2.36)

1.00

1.88

(0.93

-

3.81)

 2nd generation

1.00

1.25

(0.99

-

1.57)

1.00

1.81

(1.15

-

2.84)

 3rd generation or more

1.00

0.71

(0.30

-

1.69)

1.00

1.67

(0.52

-

5.41)

Number of household members

 2

1.00

1.59

(1.13

-

2.23)

1.00

2.11

(1.22

-

3.66)

 3

1.00

1.34

(0.97

-

1.86)

1.00

1.51

(0.89

-

2.56)

 4

1.00

1.17

(0.83

-

1.66)

1.00

1.20

(0.94

-

2.14)

  ≥ 5

1.00

0.77

(0.35

-

1.69)

1.00

1.05

(0.32

-

3.45)