A patient-centered view of symptoms, functional impact, and priorities in post-COVID-19 syndrome: cross-sectional results from the Québec Action Post-COVID cohort. — CFSMEATLAS
A patient-centered view of symptoms, functional impact, and priorities in post-COVID-19 syndrome: cross-sectional results from the Québec Action Post-COVID cohort.
Mayo, Nancy E, Brouillette, Marie-Josée, Falcone, Emilia Liana et al. · BMC infectious diseases · 2025 · DOI
Quick Summary
This study surveyed 535 people in Quebec living with long-term COVID symptoms to understand what symptoms they experience, how much these symptoms affect their daily lives, and what treatments matter most to them. The most common symptom was fatigue, and people reported symptoms affecting multiple body systems. Most participants had been dealing with symptoms for over a year, and the impact on their quality of life was significant.
Why It Matters
This study provides empirical data on the symptom patterns, functional burden, and patient priorities in post-COVID-19 syndrome, which shares significant clinical overlap with ME/CFS. Understanding which symptoms most impair quality of life and what patients prioritize can guide research directions and health service planning for similar post-viral conditions. The identification of PEM and fatigue as top priorities validates the importance of these ME/CFS-like features in long COVID research.
Observed Findings
Fatigue was the most frequently reported symptom across the cohort.
Participants reported symptoms affecting an average of 4.5 organ systems.
Moderate-to-severe functional and quality-of-life impacts persisted for ≥1 year in the majority of participants.
Patient-identified intervention priorities were fatigue, post-exercise malaise, cognitive symptoms, shortness of breath, and impaired taste/smell.
Older age was associated with lower reported impact, while gender differences were minimal except for PEM prevalence.
Inferred Conclusions
Post-COVID-19 syndrome involves multi-system symptom involvement with substantial functional burden persisting beyond one year post-infection.
Fatigue and post-exercise malaise are core symptoms requiring urgent research and clinical attention.
Personalized, symptom-targeted approaches may be more effective than one-size-fits-all interventions, given heterogeneous symptom clusters and patient priorities.
These findings can inform health services planning and research priorities for PCS in Canada and internationally.
Remaining Questions
What are the pathophysiological mechanisms underlying fatigue and post-exercise malaise in PCS, and do they differ from ME/CFS?
What This Study Does Not Prove
This cross-sectional study cannot establish causality or mechanisms underlying PCS symptoms. The reliance on social media and voluntary recruitment may introduce selection bias toward individuals with more severe symptoms or greater engagement with health advocacy. The study does not compare PCS to ME/CFS directly or examine whether these conditions are mechanistically identical.
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
How do symptom clusters and severity trajectories evolve over time, and are there predictors of recovery versus persistent disability?
Which interventions most effectively address patient-identified priorities, and what is the comparative effectiveness of different treatment approaches?
How representative are these participants of the broader PCS population, particularly those not actively seeking healthcare or engaging with social media recruitment?