What is the symptom severity (SS) scale in the diagnostic criteria for fibromyalgia?

Updated: Apr 23, 2020
  • Author: Chad S Boomershine, MD, PhD, CPI, CPT; Chief Editor: Herbert S Diamond, MD  more...
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The SS scale quantifies symptom severity on a 0-12 scale by scoring problems with fatigue, cognitive dysfunction and unrefreshed sleep over the past week each on a scale from 0-3, as follows:

  • 0 = No problem
  • 1 = A slight or mild problem (generally mild or intermittent)
  • 2 = A moderate or considerable problem (often present and/or at a moderate level)
  • 3 = A severe, continuous, life-disturbing problem

These scores are summed for a measure of the physician’s impression of the number of somatic symptoms the patient has on a 0-3 scale, as follows:

  • 0 = No symptoms
  • 1 = A few symptoms
  • 2 = A moderate number of symptoms
  • 3 = A great deal of symptoms.

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