Collected Dataset / Lc65_Sample1_Followup6

The population is composed of non-institutionalized males and females aged 65 to 70 in 2004 (birth year 1934 to 1938).

Follow-up yearly questionnaires repeated a large set of baseline questions to assess longitudinal changes (e.g. self-rated health status), but also introduced additional measures over time as they became more relevant (e.g. memory difficulties). The frequency at which questions were repeated ranged from every year to every 5 years (e.g. sleep). In parallel, ad-hoc surveys were regularly conducted on topics such as sexuality (2007), falls (falls diary, 2011), quality of life (2011), care and medication (2012), the new national adult protection law (2014) and COVID-19 (2020). In addition, participants were invited every third year at the study centre to repeat the in-person interview and examination carried out at baseline. Cognitive function was assessed using the mini-mental state examination; clock drawing test; verbal fluency; and the trail making test A and B . File linkage with death certificates, possibly with hospital discharge records if feasible were completed until death or refusal.