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Table 4 BCTQ scores for severity scale of symptoms relative to CTS diagnosis by US and NCS

From: Effectiveness of ultrasonography and nerve conduction studies in the diagnosing of carpal tunnel syndrome: clinical trial on accuracy

Parameter After treatment Before treatment Difference between after and before treatment
US    
 CSA ≥10 mm2 (presence) 1.7 (0.7) 3.5 (0.7) −1.8 (0.9)
 CSA < 10 mm2 (absence) 1.9 (0.8) 3.7 (0.8) −1.8 (1.0)
NCS    
 SCV < 50 m/s and DML ≥4.2 ms (presence) 1.7 (0.7) 3.5 (0.7) − 1.8 (0.9)
 SCV ≥50 m/s and DML < 4.2 ms (absence) 2.1 (0.9) 3.7 (0.8) −1.6 (1.0)
  1. n = 115 patients
  2. Results are given as the mean (SD)
  3. CSA cross sectional area, ANOVA analysis of variance, BCTQ Boston Carpal Tunnel Questionnaire, NCS nerve conduction studies, DML distal motor latency, US ultrasonography, SCV sensory conduction velocity
  4. ANOVA for repeated measurements—diagnostic effect: US (p = 0.135), NCS (p = 0.059)
  5. ANOVA for repeated measures—effect of surgical treatment: US (p < 0.001), NCS (p < 0.001)
  6. ANOVA for repeated measurements—effect of interaction between diagnosis and surgical treatment: US (p = 0.990), NCS (p = 0.246)