Table 1. Comparison of the study data with the German population according to “Statistisches Bundesamt 2009”.

	Males (in %)		Females (in %)
Age	Study	German pop.	study	German pop.
18–30	17.2	18.1	15.7	16.2
31–40	16.0	15.8	18.3	14.4
41–50	21.2	21.5	20.0	19.4
51–60	17.8	17.0	16.9	16.1
61–70	17.3	13.7	16.6	13.7
>70 y.	10.4	13.9	12.5	19.8