Study Population
Among the 521 participants examined by the study nurses at baseline, the mean (SD) age was 83.5 (6.17) years, 356 were women (68.3%), and 165 were men (31.7%). Ethnicity data were not collected because no scientific definitions are available for the population in Germany. A comparative analysis showed that there were no statistically significant differences between the populations in the intervention (n = 272) and control (n = 249) arms. 