Table 3.

Relationships Between Pain Ratings and Pain Catastrophizing

	Pain Alone		Pain During CStroop		Pain During IStroop
	PI	PU	PI	PU	PI	PU
Fibromyalgia (N = 20)	0.28	0.28	0.58	0.57	0.72	0.79
	P = 0.25	P = 0.24	P = 0.009	P = 0.011	P = 0.001	P < 0.001
Control (N = 18)	−0.19	−0.33	0.37	0.32	0.42	0.36
	P = 0.46	P = 0.23	P = 0.14	P = 0.22	P = 0.087	P = 0.15
Group comparisons (z-scores)	1.4	1.84	0.8	0.92	1.34	2.02
	P = 0.16	P = 0.06	P = 0.42	P = 0.36	P = 0.18	P = 0.04

Upper rows show partial correlations between pain intensity and unpleasantness ratings and scores on the Pain Catastrophizing Scale, controlling for Scores on the Beck Depression Inventory for FM patients and controls during each of the three experimental runs. The bottom row shows group differences in correlation coefficients (z-scores) associated with each experimental run.

CStroop = congruent Stroop; IStroop = incongruent Stroop; PI = pain intensity; PU = pain unpleasantness.