Table 3. Linear Regression Analysis of Correlations in DASH Scores at Postoperative 2 Years.

	DASH score
	Correlation coefficient (r)	p value
Age	0.316	0.016
Gender	13.504	0.072
Side (dominant/non-dominant)	-6.242	0.204
Duration of symptoms	-0.104	0.181
Preoperative MCV	-0.319	0.090
Preoperative grip strength	-0.576	0.019
Preoperative pinch strength	-1.970	0.161
Preoperative 2PD	3.066	<0.001
Preoperative Dellon grade
Grade II:I	-8.000	0.302
Grade III:II	5.180	0.509
Surgical procedure
Simple decompression: anterior transposition	2.877	0.593

MCV, motor nerve conduction velocity at the elbow segment; 2PD, two-point discrimination; DASH, disability of arm, shoulder, and hand.