Variable

Dimension

Question

Dependent variable

Preventive medical service

When did you take the last physical examination?

Therapeutic medical service

Out-patient care:in the past month have you visited a public hospital, private hospital, public health center, clinic, or health worker’s or doctor’s practice, or been visited by a health worker or doctor for outpatient care?

In-patient care: Have you received inpatient care in the past year?

Independent variable

The types of residence

Living alone

Living with children

Living with spouse

Living with grand-

-children

What is your marital status?

Have you ever given birth to any child? If yes, how many are currently living?

Have you ever adopted or fostered any child or step child? If yes, how many are currently living?

Where does this child normally live now?

Did you spend any time taking care of your grandchildren or great-grandchildren last year?

Approximately how many weeks and how many hours per week did you spend last year taking care of this child’s children or grandchildren?

The number of cohabitants

Distance to the residence

Control variable

Potential factors

When were you born?

What is your current HuKou status?

What is the highest level of education you have attained?

Precipitating factors

Are you the policy holder/primary beneficiary of any of the types of health insurance listed below?

Did you receive any wage and bonus income in the past year?

Required variables

Would you say your health is excellent, very good, good, fair, or poor?

Would you say your health is very good, good, fair, poor or very poor?

Have you been diagnosed with [conditions listed below, read one by one] by a doctor?