Variables

Model 1

Model 2

US$75
(95% CI = 73-76)*

US$74
(95% CI = 72-76)*

CR

95% CI

CR

95% CI

Age

20-34

1

1

35-49

1.61

1.39

1.86

1.51

1.30

1.76

50-64

3.64

3.06

4.34

3.06

2.56

3.67

65-74

4.96

4.02

6.13

4.17

3.35

5.18

75+

5.31

3.99

7.06

4.34

3.24

5.81

Number of concurrent chronic diseases

0

1

1

3.09

2.64

3.60

2

4.47

3.71

5.39

3+

4.81

3.05

7.58

Chronic diseases

No

1

Hypertension

3.97

3.38

4.66

Diabetes

6.14

4.35

8.68

Osteoarthritis

1.98

1.54

2.54

Asthma

4.67

2.51

8.70

Two or more conditions w/o diabetes

4.24

3.24

5.54

Two or more conditions with diabetes

7.36

5.83

9.29

BMI (kg/m2)†

< 18.5

0.96

0.77

1.19

0.95

0.76

1.18

18.5 to < 23

1

1

23 to < 25

1.11

0.99

1.24

1.07

0.95

1.20

≥ 25

1.13

1.00

1.26

1.09

0.97

1.23

Smoking

Current-smoker

0.86

0.74

1.00

0.82

0.70

0.96

Ex-smoker

1.14

0.96

1.35

1.12

0.94

1.33

None-smoker

1

1

Gender

Male

0.87

0.75

1.00

0.85

0.74

0.99

Female

1

1

Education

Elementary school

1

1

Middle school

1.07

0.90

1.27

1.13

0.95

1.35

High school

0.85

0.74

0.99

0.95

0.82

1.11

College or more

0.89

0.75

1.05

0.99

0.83

1.17

Marital status

Married

1

1

Separated/widowed/divorced

1.06

0.90

1.25

1.05

0.89

1.24

Single

0.70

0.60

0.82

0.73

0.62

0.86

Household income (average per year)

Low (< US$11,110 )

1

1

Middle 1 (US$11,110-17,600)

1.07

0.94

1.22

1.07

0.94

1.22

Middle 2 (US$17,600-26,100)

1.09

0.95

1.25

1.06

0.92

1.22

High (≥ 26,100)

1.07

0.93

1.23

1.07

0.93

1.23