Table 4.

Assignment of logistic regression analysis variables

Variables	Definition
Dependent variable
Mental health	1 = good, 2 = moderately, 3 = poor, 4 = bad
Independent variables
Sex	0 = male, 1 = female
Age (year)	1 = 65–69, 2 = 70–74, 3 = 75–79, 3 = ~ 80
Education level	1 = high school and above, 2 = junior middle school, 3 = primary school, 4 = illiteracy
Marital status	0 = single (never married, divorced, widowed), 1 = married
Living arrangement	0 = living alone, 1 = not living alone
Annual per capital income	1 = ~ 1000, 2 = ~ 2000, 3 = ~ 3000, 4 = ~ 4000, 5 = ~ 5000
Chronic disease	0 = yes, 1 = no
Race	0 = Han population, 1 = minority
Self-rated health	1 = very good, 2 = fairly good, 3 = moderately, 4 = fairly bad, 5 = very bad