Table 5.

BCTQ scores for functional status scale relative to CTS diagnosis by US and NCS

Parameter	After treatment	Before treatment	Difference between after and before treatment
US
CSA ≥ 10 mm2 (presence)	2.0 (0.9)	3.6 (0.9)	−1.6 (1.1)
CSA < 10 mm2 (absence)	2.1 (0.9)	3.6 (1.0)	−1.5 (1.1)
NCS
SCV < 50 m/s and DML ≥4.2 ms (presence)	2.0 (0.9)	3.6 (0.9)	−1.6 (1.1)
SCV ≥ 50 m/s and DML < 4.2 ms (absence)	2.3 (0.9)	3.7 (0.8)	−1.5 (1.1)

n = 115 patients

Results are given as the mean (SD)

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

ANOVA for repeated measurements—diagnostic effect: US (p = 0.634), NCS (p = 0.821)

ANOVA for repeated measures—effect of surgical treatment: US (p < 0.001), NCS (p < 0.001)

ANOVA for repeated measures—effect of interaction between diagnosis and surgical treatment: US (p = 0.629), NCS (p = 0.622)