Nancy Mayo, M. Brouillette, Lesley K Fellows, Stanley Hum
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Quantifying the Degree of Fatigue in People Reporting Symptoms of Post-COVID Syndrome: Results from a Rasch Analysis
Fatigue is a defining feature of post-COVID syndrome (PCS), yet there is no accepted measure of this life-altering consequence. The aim here was to create a measure fit for the purposes of quantifying the severity of PCS fatigue and provide initial evidence for its relationships with measures of converging constructs. A cross-sectional analysis of the first 414 participants in the Quebec Action for Post-COVID cohort study who self-identified with PCS was undertaken. In total, 17 items were available, including items commonly used in fatigue studies and to identify post-exertional malaise (PEM). Rasch analysis identified that 10 of the 17 items fit a unidimensional linear model with a theoretical range from 0 to 21 (none to highest fatigue). The PCS Fatigue Severity Measure V1 (mean: 13.8; SD: 4.7) correlated highly with criterion measures of fatigue (r ≈│0.8│). Correlations with converging constructs of pain, physical function, and health rating exceeded │0.5│. PCS Fatigue Severity Measure V1 was distinguished between people working versus those on sick leave (difference: 5.1 points; effect size: 1.08). Effect sizes for people with and without irritability or meeting criteria for post-traumatic distress were approximately equal to 0.5. There is sufficient evidence that this measure is fit for purpose for quantifying fatigue in this population at one point in time. Further evidence in other samples is required to verify content and performance over time.
期刊介绍:
Physiotherapy Canada is the official, scholarly, refereed journal of the Canadian Physiotherapy Association (CPA), giving direction to excellence in clinical science and reasoning, knowledge translation, therapeutic skills and patient-centred care.
Founded in 1923, Physiotherapy Canada meets the diverse needs of national and international readers and serves as a key repository of inquiries, evidence and advances in the practice of physiotherapy.
Physiotherapy Canada publishes the results of qualitative and quantitative research including systematic reviews, meta analyses, meta syntheses, public/health policy research, clinical practice guidelines, and case reports. Key messages, clinical commentaries, brief reports and book reviews support knowledge translation to clinical practice.
In addition to delivering authoritative, original scientific articles and reports of significant clinical studies, Physiotherapy Canada’s editorials and abstracts are presented in both English and French, expanding the journal’s reach nationally and internationally. Key messages form an integral part of each research article, providing a succinct summary for readers of all levels. This approach also allows readers to quickly get a feel for ‘what is already known’ and ‘what this study adds to’ the subject.
Clinician’s commentaries for key articles assist in bridging research and practice by discussing the article’s impact at the clinical level. The journal also features special themed series which bring readers up to date research supporting evidence-informed practice.
The Canadian Physiotherapy Association (CPA) is the national professional association representing almost 15,000 members distributed throughout all provinces and territories. CPA’s mission is to provide leadership and direction to the physiotherapy profession, foster excellence in practice, education and research, and promote high standards of health in Canada.