Davenport, Todd E, Stevens, Staci R, Baroni, Katie et al. · Disability and rehabilitation · 2011 · DOI
This study tested whether a common health questionnaire (SF-36) could accurately measure how ME/CFS affects quality of life and symptom burden. Researchers gave the questionnaire to 16 people with ME/CFS and 14 healthy controls, then had them perform exercise tests to see how their symptoms changed. The SF-36 successfully captured differences between the two groups and predicted who would recover quickly after exercise.
Reliable measurement tools are essential for ME/CFS clinical practice and research. This study validates the SF-36v2's ability to detect health differences between CFS patients and controls and to predict post-exertional recovery time, making it a useful tool for monitoring patient status and evaluating interventions.
This study does not establish whether the SF-36v2 can detect changes in individual patients over time (sensitivity to change), nor does it prove causation between exercise and symptom exacerbation—only that symptoms occur together. The small sample size (n=30) and use of maximal exercise (which may not reflect typical activity patterns) limit generalizability.
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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