Skip to main content

Table 8 Correlations of the scores in psychological questionnaires with psychophysiological measures within the fibromyalgia patient group (Relations between the psychological and psychophysiological measures)

From: Muscle activity and acute stress in fibromyalgia

  FIQ PCS STAI-A STAI-B PSS Pain Stress %EMG EMG Rest
PCS 0.40**         
STAI-A 0.56** 0.34*        
STAI-B 0.54** 0.30* 0.75**       
PSS 0.70** 0.29* 0.76** 0.80**      
Pain 0.49** 0.51** 0.38** 0.30* 0.45**     
Stress 0.38* 0.27 0.57** 0.51** 0.55** 0.50**    
%EMG 0.14 0.05 0.20 0.26 0.12 0.01 0.15   
EMG Rest -0.17 -0.05 -0.27 -0.30 -0.25 0.03 -0.33 -0.72**  
  1. FIQ Fibromyalgia Impact Questionnaire score, PCS Pain Catastrophizing Scale score, 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