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Table 3 Relationships between the changes in stiffness, numerical pain assessment and questionnaires scores

From: Assessment of the masseter stiffness in patients during conservative therapy for masticatory muscle disorders with shear wave elastography

Muscle / Scale Difference, mean ± SD Correlation with stiffness, correlation coef.; p-value
right masseter left masseter
Stiffness in the right masseter 4.17 ± 1.47   
Stiffness in the left masseter 4.26 ± 1.48   
NRS for the right masseter 5.14 ± 1.52 0.1461; 0.4024  
NRS for the left masseter 5.00 ± 1.5   0.4396; 0.0082
PSS-10 0.86 ± 2.92 -0.0917; 0.6002 -0.0511; 0.7708
GAD-7 0.91 ± 1.36 -0.1746; 0.3158 -0.1412; 0.4185
PSQI 0.54 ± 1.17 0.1195; 0.4942 0.0212; 0.9038
ESS 0.94 ± 1.11 0.1063; 0.5434 0.1003; 0.5663
SWLS -0.57 ± 0.92 -0.0660; 0.7063 -0.1628; 0.3501
SSS-8 5.29 ± 4.29 -0.0201; 0.9086 -0.0088; 0.9602
  1. ESS Epworth Sleepiness Scale, GAD-7 Generalized Anxiety Disorder-7, IQR Interquartile range, NRS numerical rating scale, PSQI Pittsburgh Sleep Quality Index, PSS Perceived Stress Scale, SD Standard deviation, SSS-8 Somatic Symptom Scale-8 (SSS-8), SWLS Satisfaction with Life Scale