Table 1.

Individual history of prior FPS: total number of FPS reported by cases and controls

	Cases (N = 45)	Controls (N = 56)
	N (%)	N (%)
Reporting no FPS	13 (28.9)	45 (80.4)
Reporting 1 FPS	17 (37.8)	6 (10.7)
Reporting 2 FPS	5 (11.1)	4 (7.1)
Reporting 3 FPS	8 (17.8)	1 (1.8)
Reporting 4 FPS	2 (4.4)	0 (0)

Abbreviation: FPS, functional pain syndromes.