Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Assessing Functional Capacity in ME/CFS: A Patient Informed Questionnaire

Version 1 : Received: 28 September 2023 / Approved: 29 September 2023 / Online: 29 September 2023 (09:21:59 CEST)

How to cite: Sommerfelt, K.; Schei, T.; Seton, K.A.; Carding, S.R. Assessing Functional Capacity in ME/CFS: A Patient Informed Questionnaire. Preprints 2023, 2023092091. https://doi.org/10.20944/preprints202309.2091.v1 Sommerfelt, K.; Schei, T.; Seton, K.A.; Carding, S.R. Assessing Functional Capacity in ME/CFS: A Patient Informed Questionnaire. Preprints 2023, 2023092091. https://doi.org/10.20944/preprints202309.2091.v1

Abstract

Myalgic Encephalomyelitis / Chronic Fatigue Syndrome (ME/CFS) is an acquired disease with significant morbidity that affects both children and adults. Effective tools to assess functional capacity (FC) are severely lacking which has significant consequences for timely diagnosis, assessments for patient disability benefits and assessing the impact and effectiveness of interventions. In interventional research the inability to assess FC can result in an incomplete assessment of the potential effect of the intervention. Specifically of concern is that if an intervention is effective in reducing symptom load, patients may increase their activity level to reach a pre-intervention symptom load. Thus, if FC is not accurately assessed, beneficial treatment outcomes may be missed. To address this issue, using extensive, repeated patient feedback we have developed a new questionnaire, FUNCAP, to achieve optimal FC assessment in ME/CFS patients. The questionnaire covers eight domains and activity types: A. Personal hygiene / basic functions, B. Walking / movement, C. Being upright, D. Activities in the home, E. Communication, F. Activities outside the home, G. Reactions to light and sound, and H. Concentration. Through five rounds of anonymous web-based surveys and a further test - retest validation round, two versions of the questionnaire were developed; a longer version comprising 55 questions (FUNCAP55) to improve diagnostic and disability benefit/ insurance FC assessments and a shorter version (FUNCAP27) for interventional research and less extensive FC assessments. FUNCAP may also be useful in other conditions where fatigue and PEM is present, such as Long Covid.

Keywords

ME/CFS; chronic fatigue syndrome; functional capacity; post exertional malaise; questionnaire; survey

Subject

Medicine and Pharmacology, Neuroscience and Neurology

Comments (1)

Comment 1
Received: 22 February 2024
Commenter:
The commenter has declared there is no conflict of interests.
Comment: This is useful
Thanks
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