1 = man
2 = women

1 = Han nationality
2 = Minority nationality

1 = yes
2 = no

1 = unmarried
2 = married
3 = widowed
4 = divorced
5 = other

1 = Illiterate
2 = Primary School
3 = Junior High School
4 = Senior High School/Associate Degree
5 = Bachelor’s Degree and above

1 = Farmer
2 = Teacher
3 = Worker
4 = Doctor
5 = Civil Servant
6 = Self-Employed
7 = other

1 = Living Alone
2 = Living with Family/Friends
3 = Assisted Living / Nursing Home
4 = other

1 = Urban
2 = Rural

1 = <1000
2 = 1000~1999
3 = 2000~2999
4 = 3000~3999
5 = 4000~4999
6 = >=5000

1 = Cooperative Medical Care
2 = Self-funded
3 = Public Medical Care
4 = Commercial Health Insurance
5 = other

1 = Lung Cancer
2 = Liver Cancer
3 = Stomach Cancer
4 = Colorectal Cancer
5 = Breast Cancer
6 = other

1 = no
2 = yes

1 = 1~3
2 = 4~6
3 = 7 and above

1 = stage 1
2 = stage 2
3 = stage 3
4 = stage 4