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Table 9 Correlations of the scores in psychological questionnaires with psychophysiological measures within the control group (Relations between the psychological and psychophysiological measures)

From: Muscle activity and acute stress in fibromyalgia

 

STAI-A

STAI-B

PSS

Pain

Stress

%EMG

EMG Rest

STAI-B

0.61**

      

PSS

0.55**

0.76**

     

Pain

0.12

0.24

0.12

    

Stress

0.01

-0.04

0.06

-0.07

   

%EMG

0.14

0.19

0.26

-0.09

0.19

  

EMG Rest

-0.34

-0.31

-0.24

0.13

-0.25

-0.55**

 
  1. STAI-A State-Trait Anxiety Index State score, STAI-B State-Trait Anxiety Index Trait-score, PSS Perceived Stress Scale score, Pain mean reported pain intensity across the protocol, Stress mean reported stress intensity across the protocol, %EMG mean normalized sEMG across the protocol. * = significant at p < 0.05 level; ** significant at p < 0.001. level