Journal of Internal Medicine · 2013 · 72 citations · 46 references
The presence of POTS marks a distinct clinical group of CFS patents, with phenotypic features differentiating them from those without POTS. A combination of validated clinical assessment tools can determine which CFS patients have POTS with a high degree of accuracy, and thus potentially identify those who require further investigation and consideration for therapy to control heart rate.
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The Hospital Anxiety and Depression Scale
A. S. Zigmond, R. P. Snaith · Acta Psychiatrica Scandinavica · 1983 · 45.5K citations
The MOS 36-ltem Short-Form Health Survey (SF-36)
John E. Ware, Cathy D. Sherbourne · Medical Care · 1992 · 29.1K citations
A New Method for Measuring Daytime Sleepiness: The Epworth Sleepiness Scale
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