A patient satisfies diagnostic criteria for fibromyalgia if the following three conditions are met:

• Widespread Pain Index (WPI) is ≥ 7 and Symptom Severity (SS) scale score is ≥ 5, OR WPI is between 3 and 6 and SS scale score is ≥ 9.

• Symptoms have been present at a similar level for at least 3 months.

• The patient does not have another disorder that would otherwise explain the pain.

Widespread Pain Index

Over the last 7 days, indicate the areas where you have had pain or tenderness (score 0–19):

• neck
• upper back
• chest or breast
• abdomen
• lower back
• left jaw
• left shoulder
• left upper arm
• left lower arm
• left hip
• left upper leg
• left lower leg
• right jaw
• right shoulder
• right upper arm
• right lower arm
• right hip
• right upper leg
• right lower leg

Symptom Severity Scale Score

Part A. For the each of the 3 symptoms below, indicate the level of severity over the past week using the following scale: 0 = no problem; 1 = slight or mild problems, generally mild; 2 = moderate, considerable problems, often present; 3 = severe problems: pervasive, continuous, and/or life disturbing. Add up the total score.

·        

• ____ Fatigue
• ____ Waking unrefreshed
• ____ Cognitive symptoms

Part B. Considering somatic symptoms in general, * indicate whether the patient has: 0 = no symptoms; 1 = 1 to 10 symptoms; 2 = 11 to 24 symptoms; or 3 = 25 or more symptoms.

Add the scores for Parts A and B; this is the SS score, which can range from 0 to 12.