Table II.

Comparison of electrodiagnostic parameters between case and control groups based on carpal tunnel syndrome severity.

Variable	Controls (n = 57)	Severity of CTS						Total cases (n = 58)	p-value*
		Mild (n = 20)	p-value*	Moderate (n = 19)	p-value*	Severe (n = 19)	p-value*
Mean terminal latency index (SD)	0.43 (0.07)	0.38 (0.09)	0.003	0.30 (0.05)	0.001	0.28 (0.04)	0.001	0.32 (0.07)	0.001
Mean residual latency (SD)	1.85 (0.42)	2.32 (0.29)	0.001	3.40 (0.86)	0.001	3.86 (0.89)	0.001	3.17 (0.97)	0.001
Mean MSUMLD (SD)	0.12 (0.37)	0.75 (0.37)	0.001	1.43 (0.51)	0.001	1.37 (1.13)	0.001	1.17 (0.79)	0.001
Mean FdifMU (SD)	-0.27 (1.12)	0.82 (0.73)	0.002	2.02 (1.34)	0.001	2.50 (2.03)	0.001	1.76 (1.60)	0.001

^*Independent-sample t-test.

CTS, carpal tunnel syndrome; FdifMU, median ulnar F-wave latency difference; MSUMLD, median sensory latency-ulnar motor latency difference.