Table 4 Spearman correlation coefficients of the relationship between fibromyalgia symptoms with the delta value of oxyhemoglobin (ΔHbO*) as cortical deactivation measure in either PFC or MC (n = 22).

From: The mapping of cortical activation by near-infrared spectroscopy might be a biomarker related to the severity of fibromyalgia symptoms

 

(1)

(2)

(3)

(4)

(5)

Portuguese Profile of Chronic Pain Screen (BP-PCP:S) total score (1)

1

    

Central Sensitization Inventory (BP-SCI) total score (2)

0.64**

1

   

ΔHbO* based on [HbO level before thermal stimuli onset minus HbO level 15 s after thermal stimuli end] on the left PCF (3)

0.40*

0.60**

1

  

ΔHbO* based on [HbO level before thermal stimuli onset minus HbO level 15 s after thermal stimuli end] on the right PCF (4)

0.09

0.24

0.80**

1

 

ΔHbO* based on [HbO level before thermal stimuli onset minus HbO level 15 s after thermal stimuli end] on the left MC (5)

− 0.06

0.18

0.48*

0.69**

1

ΔHbO* based on [HbO level before thermal stimuli onset minus HbO level 15 s after thermal stimuli end] on the right MC (6)

0.01

0.37

39

0.42

0.73**

  1. Prefrontal cortex (PFC); motor cortex (MC). Correlation is significant at the 0.01 level (2-tailed); ΔHbO* in millimolar (mM).
  2. **Correlation is significant at the 0.05 level (2-tailed).
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