Table 2.

Descriptive Statistics

	Percentage/mean (SD)	Weighted result
Proxy (%)	29.8	5.5
Gender (female, %)	57.4	53.0
Age (year)	86.4 (11.7)	72.5 (6.1)
Ethnicity (non-Han, %)	5.6	5.8
Living environment
Living in urban area (%)	24.0	19.2
Living in town area (%)	22.0	15.8
Living in rural area (%)	54.0	65.0
Living arrangement
Living with family (%)	81.9	85.0
Living in institution (%)	4.6	2.4
Living alone	13.5	12.6
Social support (range = 0–12)	10.7 (2.3)	11.0 (1.9)
Education (year)	2.0 (3.5)	2.6 (3.7)
Income (10,000 yuan)	0.3 (0.4)	0.3 (0.3)
MMSE (range = 0–30)	17.8 (7.7)	22.2 (4.0)
Depression symptom (range = 0–5)	0.7 (1.0)	0.7 (0.9)
Comorbidity	1.2 (1.4)	1.2 (1.3)