The Malaysian Elders Longitudinal Research (MELoR) study is a longitudinal cohort study involving individuals aged 55 years and older selected through simple random sampling stratified by age and ethnicity from the electoral rolls of the parliamentary constituencies of Petaling Jaya Utara, Petaling Jaya Selatan, and Lembah Pantai. Recruitment was through house-to-house and postal invitation. The study also included volunteers who fulfilled the age criteria living within the geographical location. Informed consent was obtained from each individual before their inclusion. Individuals who were unable to provide informed consent were excluded. The MELoR project was approved by the University of Malaya Medical Ethics Committee (MEC Ref No: 943.6).
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