course of disease
1 = ＜1year
2 = 1-3year
3 = ＞3year

marital status
1 = Unmarried
2 = Married
3 = Divorce
4 = Remarry

Whether there are children
1 = yes
2 = no

residential status
1 = Living alone
2 = Living with a spouse
3 = Living with children
4 = Living with your spouse and children
5 = Other

educational level
1 = Elementary school
2 = Junior high school
3 = High school
4 = Undergraduate
5 = Graduate student

1 = Farmer
2 = Worker
3 = Teacher
4 = Medical personnel
5 = Public servant
6 = Freelancing
7 = Unemployed
8 = Retire
9 = other

per capita monthly income
1 = ＜1000RMB
2 = 1000-2999RMB
3 = 3000-6999RMB
4 = 7000-9999RMB
5 = ＞10000RMB