Variate

assignment

age

1 = 18 - 39 years old, 2 = 40 - 49 years old, 3 = 50 - 59 years old, 4 = 60 - 67 years old

education level

1 = primary school or below, 2 = junior high school, 3 = technical secondary school, 4 = junior college, 5 = undergraduate or below

marital status

1 = married, 2 = single, 3 = widowed

working status

1 = active, 2 = inactive

per capita monthly household income

1 = <2000 yuan, 2 = 2000 - 6000 yuan, 3 = >6000 yuan

living arrangement:

1 = live alone, 2 = live with family

tumor stage

1 = I, 2 = II, 3 = III, 4 = IV

length of stay

1 = 1 - 4 days, 2 = 5 - 9 days, 3 = 10 - 14 days, 4 = 15 - 22 days

discharge with drainage tube

1 = No, 2 = Yes