Table 1.

Characteristics of the study population compared to the elderly (i.e. ≥ 65 years) Dutch population

	CHO-CAP-study (n = 48,634)	General Dutch elderly population in 2010^a (n = 2,538,328)
Sex (%)
Male	57.2	43.7
Female	42.8	56.3
Age (%)
65–69 years	39.9	30.6
70–74 years	30.0	24.4
75–79 years	18.3	19.5
80–84 years	8.7	13.8
≥ 85 years	3.1	11.7
Education (%)^b
Low	41.9	56.2
Middle	33.8	28.2
High	23.0	15.6
Region (%)
North	6.2	11.2
East	24.7	20.6
West	36.6	45.1
South	32.4	23.1

^a Figures from the Dutch population are derived from Statistics Netherlands for the year 2010 [29]

^b Education level: 1.2% missing data