Table 1. Response rate and number of adults in source population, eligible population, and study population.

	Aged 40–64 years		Aged ≥65 years		Total
	Men	Women	Men	Women
No. of source population	23 647	22 760	12 750	18 944	78 101
No. of eligible population (A)	23 359	22 639	12 606	18 631	77 235
No. of persons responding to the survey	12 967	13 849	9690	13 704	50 210
No. of study population (B)	12 833	13 679	9605	13 486	49 603
Response rate (B/A) (%)	54.9	60.4	76.2	72.4	64.2