Table 1.

Demographic characteristics of patients.

Characteristics	Total numbers of patients	Results
Sex (male/female), n (%)	618	284/334 (46/54)
Age, yr, mean ± standard deviation	618	68.06 ± 9.80
Educational background	219
Uneducated, n (%)		10 (7.8)
Elementary school graduate, n (%)		40 (31.0%)
Middle school graduate, n (%)		18 (14.0)
High school graduate, n (%)		23 (17.8)
College graduate, n (%)		16 (12.4)
Postgraduate school, n (%)		6 (4.6)
Nonresponse, n (%)		16 (12.4)
Occupations	219
Tertiary industry, n (%)		7 (5.4)
Professionals, n (%)		4 (3.1)
Self-employed, n (%)		4 (3.1)
Primary industry, n (%)		6 (4.7)
Housework, n (%)		54 (41.9)
Unemployed, n (%)		40 (31.0)
Others, n (%)		14 (10.8)