Kansas Symptom Severity (KSS) score
pain
The KSS calculation utilizes the data from the three most prominent symptom domains of the Kansas case definition questionnaire: fatigue/sleep problems, neurological/cognitive/mood symptoms, and pain symptoms. For each survey question, the subjects rated the severity of the symptom. A numerical value was assigned to each symptom severity rating: none = 0, mild = 1, moderate = 2, severe = 3. The scores within each domain were averaged, and the 3 domain averages were summed. Thus, each study subject received a summary score ranging from 0 to 9.