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Table 2 Median nerve CSA, wrist-to-forearm ratio, and median nerve mean stiffness value by ultrasound elastography across controls and different CTS severity subgroups

From: Diagnostic value of median nerve shear wave ultrasound elastography in diagnosis and differentiation of carpal tunnel syndrome severity

Variable Number Mean ± SD P value
Median nerve CSA (mm2)
Control 40 7.2 ± 1.82 0.01
CTS with normal NCS 6 9.56 ± 1.01  
Mild 16 9.94 ± 1.29  
Moderate 19 12.73 ± 1.64  
Severe 15 13.12 ± 1.15  
Wrist/forearm ratio    
Control 40 1.6 ± 0.41 0.01
CTS with normal NCS 6 1.74 ± 0.76  
Mild 16 1.98 ± 0.89  
Moderate 19 2.79 ± 0.47  
Severe 15 2.9 ± 0.28  
Median nerve stiffness (kPa)    
Control 40 38.13 ± 23.56 < 0.001
CTS with normal NCS 6 75.78 ± 17.19  
Mild 16 81.64 ± 15.97  
Moderate 19 110.42 ± 16.19  
Severe 15 117.65 ± 14.84  
  1. CSA cross−sectional area, CTS carpal tunnel syndrome, kPa kilopascals, NCS nerve conduction studies
  2. *P value < 0.05 considered significant