Park, Jungwee, Gilmour, Heather · Health reports · 2017
This Canadian study found that about 5.5% of adults (roughly 1.3 million people) report medically unexplained physical symptoms, including ME/CFS, fibromyalgia, and chemical sensitivities. People with these conditions use more healthcare services, have higher rates of other health problems, and struggle more with employment than those without these conditions. About 1 in 4 people with these symptoms said they couldn't get the healthcare they needed.
This study quantifies the substantial burden of ME/CFS and related unexplained conditions on Canadian society, documenting high rates of comorbidity, healthcare use, and employment disability. These population-level data highlight the significant unmet healthcare needs and productivity losses associated with these conditions, supporting the need for improved clinical recognition and management strategies.
This study does not establish causal relationships between MUPS and comorbidities, employment loss, or healthcare outcomes—it only documents associations. The reliance on self-reported diagnoses without clinical confirmation means actual ME/CFS prevalence may differ from reported figures. The cross-sectional design cannot determine whether MUPS causes reduced employment or results from it.
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 →
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