Table 1.

Demographic information of the study subjects.

Factor		Number	Account (%)
Gender	Male	29	41.43
	Female	41	58.57
Age in years	<60 years	58	82.86
	≥60 years	12	17.14
Education	Junior high school and below	24	34.29
	High school/technical secondary school	23	32.86
	College and above	23	32.86
Occupation	Worker	11	15.71
	Professional technology/cadre/clerk	13	18.57
	Business/Service staff	15	21.43
	Other	31	44.29
Annual household income	Less than 30,000	14	20.00
	30,000–60,000	20	28.57
	60,000–100,000	26	37.14
	More than 100,000	10	14.29