MyCoSS was a cross-sectional population-based household survey. Participants aged more than 18 years old and residing in non-institutional living residences were included in the survey. Pregnant mothers, patients recently began diuretic therapy (<4 weeks), having menses during urine collection, those diagnosed to have chronic diseases (such as kidney disease, heart failure or liver disease), and having difficulty in collecting urine, were excluded from the study. To represent the Malaysian population, this survey conducted a stratified cluster sampling method. Sampling design covered both urban and rural areas for every state. Living quarters were randomly selected by the Department of Statistics Malaysia (DOSM). Only one participant was selected from a living quarter. If there were more than one eligible participant, selection was made using a modified Kish Table. Data collection started from October 2017 and completed in March 2018. Data collections via face-to-face interviews were carried out at the participant’s home using mobile tablets. Questionnaires consisted of personal information, medical and health history, physical activity, KAP and food frequency questionnaire (FFQ).