Impaired sleep, multimorbidity, and self-rated health among Canadians: Findings from a nationally representative survey

Background Self-rated health (SRH) is a globally recognized measure of health status. Both impaired sleep (IS) and the presence of multimorbidity are related to poorer SRH, but the precise nature of these associations remains unclear. This study explored the association between IS, multimorbidity, and SRH among Canadian adults. Method We used 2017-18 Canadian Community Health Survey (CCHS) data for this study. The main variable of interest, self-rated health (SRH), measured participants' health on a 5-point Likert scale, later categorized as “good or better” vs. “fair or poor”. The primary predictor, IS, was derived from two variables and categorized into four groups: no sleep issues; fewer sleeping hours (