Is the Deficit in Pain Inhibition in Fibromyalgia Influenced by Sleep Impairments?

Table 3: Correlation Analyses in Fibromyalgia Patients Between Psychophysical Measures and Clinical Variables

Clinical Variables	Psychophysical Measures	r	p-Value
FIQ total score	Thermal pain tolerance (TOL)	-0.333	0.018
	Thermal pain threshold (TPT)	-0.267	0.061
	Cold pressor test (CPT)	0.244	0.088
FIQ pain score	Tender points (PPT)	-0.357	0.011
HAM-D total score	Cold pressor test (CPT)	0.277	0.051
HAM-A total score	Cold pressor test (CPT)	0.274	0.054

^* All correlations with a level of significance of p<0.1 are reported here; FIQ indicates Fibromyalgia Impact Questionnaire; HAM-D, Hamilton Depression Rating Scale; HAM-A, Hamilton Anxiety Rating Scale; PSQI, Pittsburgh Sleep Quality Index.