Wu, Chi-Shin, Chen, Tzu-Ting, Liao, Shih-Cheng et al. · Psychological medicine · 2024 · DOI
This study compared people diagnosed with somatic symptom disorder and four types of functional somatic syndromes (including ME/CFS) to matched healthy controls in Taiwan. Patients with these conditions had higher rates of psychiatric hospitalization, suicide, death, and healthcare costs than controls, and used psychiatric medications and pain relievers more often. Overall, these conditions showed similar patterns of serious health outcomes and expenses.
This large-scale population study provides evidence that ME/CFS and related functional syndromes are associated with serious mental health complications and mortality risks requiring clinical attention. The findings validate the significance of these conditions as causing substantial healthcare burden and justify the need for better diagnostic and treatment strategies. For ME/CFS patients specifically, the data highlight the importance of integrated psychiatric care and suicide risk monitoring.
This study does not establish whether psychiatric complications and suicide risk are direct consequences of the somatic syndromes themselves or reflect shared underlying vulnerabilities, healthcare-seeking biases, or diagnostic artifacts. It cannot determine causality or explain the biological mechanisms linking these conditions to psychiatric outcomes. The reliance on insurance claims data means cases are defined by healthcare encounters rather than standardized diagnostic criteria, potentially misclassifying or excluding patients.
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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