“…Sociodemographic variables included age, sex, education, 2,4,25 monthly household income, 4,31 and residential area. 4,31,32 Health variables included self-rated health, 2,4,24 number of chronic diseases, body mass index (BMI), 33 activities of daily living (ADL), 4 instrumental activities of daily living (IADL), 2,4,25 depressive symptoms (CES-D10), 4,24,25 and baseline cognitive level (MMSE). 4,25 Monthly household income was calculated as the total household income divided by the square root of the number of household members.…”