Table 1. Sociodemographic baseline data.

	n	%
Total	6105
Sex Male Female	2875 3230	47.1 52.9
Age group 18–34 years 35–49 years 50–64 years 65–80+ years	1178 1477 1637 1812	19.3 24.2 26.8 29.7
Educational attainment (highest qualification) General or intermediate secondary school leaving certificate University/university of applied sciences entrance qualification University/university of applied sciences degree	4008 863 1111	65.6 14.1 18.2
Employment status Full time Part time/reduced hours In training Retired Unemployed Not in gainful employment/community service/parental leave	2395 898 269 1999 106 352	39.2 14.7 4.4 32.7 1.7 5.8
Region Western Germany (including western Berlin) Eastern Germany (including eastern Berlin)	5036 1069	82.5 17.5
Nationality German Other	5814 291	95.2 4.8
Community size Rural (< 5000 population) Small town (< 20 000 population) Medium-sized town (< 100 000 population) Large city (> 100 000 population)	1787 1263 1177 1381	29.3 20.7 19.3 22.6
Chronic illness Yes No	3015 3040	49.4 49.8
Subjective state of health Excellent Very good Good Less than good Poor	848 1355 2607 959 281	13.9 22.2 42.7 15.7 4.6
Health insurance Statutory Private Uninsured Other	5266 772 8 33	86.3 12.6 0.1 0.5

Difference between sum and 6105 = no data