Table 1.

Variables and assignments

Variables	Assignments
Dependent variable
Annually free physical examination	0 = no; 1 = yes
Follow-up services	0 = no; 1 = yes
Health record	0 = no; 1 = yes
Independent variable
physical status	1 = cannot self-care; 2 = unhealthy but can self-care; 3 = generally healthy; 4 = healthy;
Health
hypertension/diabetes	1 = no; 2 = yes
Economic factors
Monthly household income after tax	1 = < ¥5000; 2 = ¥5000–10,000; 3= > ¥10,000
Migration
migrating for employment	1 = no; 2 = yes
migrating for offspring	1 = no; 2 = yes
migrating duration	1 = < 5 years; 2 = 5–10 years; 3= > 10 years
migrating range	1 = cross-county;2 = cross-city; 3 = cross-provincial; 4 = cross-border
willingness for long-stay	1 = no; 2 = yes
Family
receiving care from offspring	1 = no; 2 = yes
Social support
numbers of local friends	1 = 0; 2 = 1–5; 3= > 5