Table 3.

Descriptive statistics.

Variables	Classification	Number	Frequency (%)
Age	60 years old and above	Mean value.70.41
		Standard deviation.7.08
Gender	Male	265	38.80
	Female	418	61.20
Education	Elementary school and below	297	43.48
	Junior high school	193	28.26
	High school/junior high school	138	20.21
	College	38	5.56
	Bachelor's degree or above	17	2.49
Marriage	Unmarried	10	1.46
	Married	489	71.60
	Divorced	10	1.46
	Widowed	174	25.48
Household registration	Urban	388	56.81
	Rural	295	43.19
Whether living alone	No	557	81.55
	Yes	126	18.45
Activities of daily living (ADL)	0~6	Mean value.0.05
		Standard deviation.0.43