Numbers of subjects in the fibromyalgia* (FM) and non-fibromyalgia* (non-FM) groups who met and did not meet the polysymptomatic distress scale (PDS) cutoff score of ≥ 13, respectively.
| PDS Score | FM Group, n = 174 | Non-FM Group, n = 277 |
|---|---|---|
| ≥ 13 | 162 | 23 |
| < 13 | 12 | 254 |
↵* Determined by the rheumatologist’s clinical assessment as the gold standard.