Table 4.

Hierarchical multiple conditional logistic regression analysis to assess predictors for responsiveness to CPM-task failure in fibromyalgia (n = 117).

	Beta	SEM	Wald	p	Odds ratio	CI 95%
Analgesic used (<4 times/⩾4 times per week)	1.466	0.576	6.480	0.011	4.33a	(1.40–13.38)
Heat pain threshold (HPT)	0.168	0.069	5.959	0.015	1.18a	(1.03–1.36)
Pittsburgh sleep quality index (PSQI, cutoff-Q25 ⩾ 17)	0.978	0.496	3.889	0.049	2.66b	(1.06–7.03)
Brain-derived neurotrophic factor (BDNF) ⩾ 58.11(ng/mL)	1.314	0.549	5.732	0.017	3.72b	(1.27–10.91)
Brazilian Portuguese pain catastrophizing scale ⩾33	1.300	0.477	7.432	0.006	3.67b	(1.44–9.34)
Number of psychiatric diagnosis
None			5.827	0.054
One diagnosis	1.537	0.753	4.163	0.041	4.65c	(1.06–20.36)
Two or more diagnoses	1.804	0.752	5.747	0.017	6.07c	(1.39–26.54)
Fibromyalgia impact questionnaire (FIQ) ⩾ 78	1.927	0.775	6.189	0.013	6.86d	(1.50–31.34)

FIQ: fibromyalgia impact questionnaire

Hierarchical multiple regression analysis. Cutoff point at quartile (cutoff-Q).

^aModel 1: First block – age, score on VAS (cutoff ⩾ 7), analgesic use (four or more than 4 days per week), heat pain threshold (HPT), psychotropic medication (antidepressant and anticonvulsants).

^bModel 2: Second block – model I along with catastrophizing pain (cutoff-Q₂₅ = 33), S100B (cutoff-Q₇₅ = 23.43), BDNF (cutoff-Q₇₅ = 58.11) and PSQI (cutoff-Q₂₅ ⩾ 17).

^cModel 3: Third block – model II along with depressive symptoms by BDI-II, number of psychiatric diagnoses according to the MINI (major depressive episode with dysthymia, mania-depressive disorder and generalized anxiety disorder).

^dModel 4: Fourth block – model III along with FIQ (cutoff-Q₇₅ = ⩾78) to assess the impact of symptoms on quality of life.