independent variable
McArthur, C., Turcotte, L. A., Sinn, C. L. J., Berg, K., Morris, J. N., Hirdes, J. P. 2022. Social Engagement and Distress Among Home Care Recipients During the COVID-19 Pandemic in Ontario, Canada: A Retrospective Cohort Study. Journal of the American Medical Directors Association. 23 (7) 1101-1108.