Table 4 Results of a logistic regression model

Age of householder

1.01

0.10–1.02

0.15

Region (East)

 Central

0.77

0.63–0.93

0.00^**

 West

0.78

0.65–0.95

0.01^*

Family economic level (The poorest level)

 Sub-poverty level

0.10

0.78–1.27

0.97

 General level

0.83

0.65–1.07

0.15

 Wealthier level

0.69

0.53–0.89

0.00^**

 The wealthiest level

0.87

0.67–1.12

0.27

Household size (Single-person households)

 Two-person households

1.08

0.85–1.36

0.53

 Cohabitation of three or more persons

0.70

0.51–0.95

0.02^*

Whether the householder participates in the labour (No)

 Yes

0.82

0.69–0.98

0.03^*

Household with members aged over 65 years (No)

 Yes

1.43

1.11–1.84

0.00^**

Households with disabled members (No)

 Yes

1.28

1.07–1.52

0.00^**

Householder used outpatient service in the past month (No)

 Yes

2.16

1.81–2.57

0.00^**

Householder used inpatient service in the past year (No)

 Yes

2.73

2.30–3.24

0.00^**

Whether the householder suffers from heart disease (No)

 Yes

1.12

0.92–1.38

0.27

Whether the householder suffers from stroke (No)

 Yes

1.32

1.04–1.66

0.02^*

Whether the householder suffers from malignant tumour (No)

 Yes

2.02

1.35–3.00

0.00^**

Whether the householder suffers from chronic lung disease (No)

 Yes

1.14

0.91–1.43

0.27

Whether the householder suffers from diabetes (No)

 Yes

1.13

0.89–1.43

0.31

Householder participated in medical insurance type (URRBMI)

 UEBMI

0.49

0.36–0.67

0.00^**

 NRCMS

0.92

0.73–1.16

0.47

 URBMI

0.56

0.36–0.89

0.01^*

 Other medical insurance (including uninsured)

0.45

0.28–0.70

0.00^**

_cons

0.14

0.00

Model validation

p-value

Hosmer & Lemeshow test

0.94