Table 2.

Assignment of dependent and independent variables.

Variables	Value assignment
Gender	Male = 1 and female = 2
Age	19–34 years = 1, 35–49 years = 2, 50–64 years = 3, and 65 years or older = 4
Monthly income	<1,000 CNY = 1, 1,001–2,000 CNY = 2, 2,001–4,000 CNY = 3, 4,001–6,000 CNY = 4, and ≥ 6,001 CNY = 5
Place of residence	Urban = 1 and rural = 2
Medical insurance coverage	Social basic medical insurance = 1, publicly funded health care = 2, out-of-pocket payment = 3, commercial insurance = 4, and others = 5
Education level	Primary school = 1, middle school = 2, high school/technical secondary school = 3, junior college = 4, bachelor’s degree = 5, and graduate student = 6
Employment	Retired = 1, unemployed/jobless = 2, and currently employed = 3
Occupation	Medical institutions = 1, company employees = 2, freelancers = 3, enterprise workers = 4, teachers = 5, government cadres = 6, business managers = 7, and others = 8