Table 1.

Categories of WS pain and pain regions according to fibromyalgia criteria categories. Values are n (%).

Variables	WPI 3–6 and SSS ≥ 9	WPI ≥ 7 and SSS ≥ 5	Total
Group
All patients	343 (6.8)^†	4668 (93.2)^†	5011 (100)
Patients with ACR 1990 WS pain	177 (51.6)^* (3.8)^†	4523 (96.9)^** (96.2)^†	4700 (93.8)
Patients with non-ACR 1990 WS pain	166 (48.4)^* (53.4)^†	145 (3.1)^** (46.6)^†	311 (6.2)
WS pain regions (% of all patients in column)
≤ 1	1 (0.3)	0 (0.0)	1 (0.02)
2	11 (3.2)	0 (0.0)	11 (0.2)
3	49 (14.3)	1 (0.02)	50 (1.0)
4	105 (30.6)	144 (3.1)	249 (5.0)
5	177 (51.6)	4523 (96.9)	4700 (93.8)

↵* Percent of “low” (WPI 3–6 & SSS ≥ 9) cases (n = 343).
↵** Percent of “high” (WPI ≥ 7 & SSS ≥ 5) cases (n = 4668).
↵† Percent of cases in group. WS pain: widespread pain; WPI: Widespread Pain Index; SSS: Symptom Severity Scale; ACR: American College of Rheumatology.