“…The high response rate in our survey was probably explained by a relationship of trust established over years in the local population with the conduct of the Lc65þ study. Previous research in this field was scarce and limited by small or convenience samples, 9,12,25,28,31,34,35 low participation, 16,27 conduct in population groups with specific cultural 20,28,30,31,36 or health 9,12,13,25,28,34 characteristics, survey methods likely to induce a selection bias in older populations (eg, data collected via the Internet), 15,16 failure to provide practical information to respondents regarding disability needs and social circumstances, or narrow focus on a small number of vignettes. In this context, 2 studies provided promising methodological innovations.…”