The Canadian Longitudinal Study on Aging (CLSA) is a Canada-wide study that looks at health and aging over a 20-year period. People between the ages of 45 and 85 were recruited between 2010 and 2015 to take part. The study team collects a wide range of information about people’s health as they age, including physical, emotional and social health functioning, as well as the presence of health conditions and diseases. CLSA participants fall into one of two different groups. Some people participate by telephone interview, while others participate in an in-home interview as well as visit a Data Collection Site in their area.