Table 3.

Assignment of independent variables

Variables	Assignment method
Education level	0=primary school and below, 1=middle school, 2=high school, 3=college and above
Place of residence	0=urban, 1=rural
Income (per month, RMB)	0=<1000, 1=1000~, 2=3000~, 3=5000~, 4=>10 000
Insurance	Basic medical insurance for urban residents (Z1=1, Z2=0, Z3=0, Z4=0), basic medical insurance for urban employees (Z1=0, Z2=1, Z3=0, Z4=0), new cooperative medical system (Z1=0, Z2=0, Z3=1, Z4=0), commercial insurance (Z1=0, Z2=0, Z3=0, Z4=1), self-funded (Z1=0, Z2=0, Z3=0, Z4=0)
Cancer stage	0=stage Ⅰ, 1=stage Ⅱ, 2=stage Ⅲ, 3=stage Ⅳ
With pain or not	0=no, 1=yes
Pain score	Measure value
EA	Measure value
MIL	Measure value

EA, experiential avoidance; MIL, meaning in life; RMB, renminbi.