Figure 2.

Comparison of transition groups: subjects who transitioned into the FM+CWP+ group versus subjects who remained in the FM−CWP− and FM−CWP+ groups at follow-up.

Notes: (A) Mean (SE) number of tender points at baseline. (B) Mean (SE) modified ACR 2010 criteria score at baseline. ^aRange: 0–18, with higher number indicating more areas of pain and tenderness. ^bRange: 0–31, with higher scores indicating more FM symptoms/worse outcomes. For FM−CWP− → FM+CWP+, the subjects had the same scores, and hence, there is no variability/error bars.

Abbreviations: ACR, American College of Rheumatology; CWP+, chronic widespread pain –positive; CWP−, chronic widespread pain – negative; FM+, diagnosed with fibromyalgia; FM−, not diagnosed with fibromyalgia; SE, standard error.