Figure 2
From: Toward characterization and definition of fibromyalgia severity
Relationship between duration of fibromyalgia and patient self-reported fibromyalgia severity. The percentages reflect the proportion of patients with the indicated duration of fibromyalgia who were at each self-reported severity level (e.g. of patients with fibromyalgia < 1 year, 45% reported mild disease). Chi-square = 27.22, df = 6; p = 0.0001.