The following list of studies and other papers could be helpful with regard to the claim that symptoms classified as 'fatigue' can't be measured objectively, or that potential objective measures are too unspecific.
In the field of MS research, some people looked for objective measures...
Physiotherapy. 2018 Mar;104(1):129-135. doi: 10.1016/j.physio.2017.07.005. Epub 2017 Aug 4.
Symptoms of chronic fatigue syndrome/myalgic encephalopathy are not determined by activity pacing when measured by the chronic pain coping inventory.
Thompson DP1, Antcliff D2, Woby SR3...
Weighting of orthostatic intolerance time measurements with standing difficulty score stratifies ME/CFS symptom severity and analyte detection
Alice M. RichardsonEmail author,
Don P. Lewis,
Badia Kita,
Helen Ludlow,
Nigel P. Groome,
Mark P. Hedger,
David M. de Kretser and
Brett A. Lidbury...
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Abstract
Persistent fatigue is a common problem (∼20–45% of U.S. population), with higher prevalence and severity in people with medical conditions such as cancer, depression, fibromyalgia, heart failure, sleep apnea and multiple sclerosis.
There are few FDA-approved treatments for fatigue...
General health
*36-Item Short Form Survey Instrument (SF-36)
Link to questionnaire
Outcome measurement in functional somatic syndromes: SF-36 summary scores and some scales were not valid.
Schröder A, Oernboel E, Licht RW, Sharpe M, Fink P.
Journal of Clinical Epidemiology
2011
Link to article...
http://www.tandfonline.com/doi/abs/10.1080/09638288.2017.1383518
Original Article
Defining and measuring recovery from myalgic encephalomyelitis and chronic fatigue syndrome: the physician perspective
Andrew R. Devendorf ,Carly T. Jackson,Madison Sunnquist &Leonard A. Jason
Pages 1-8 |...
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