Table 2.

Electrophysiological abnormalities in Median nerve in patients and controls

Electrophysiological Parameter [abnormal]	TEST n=56	Control n=50	Sn [%]	Sp [%]	NPV [%]	PPV [%]
MDL	23	0	41.07	100	100	60.24
MCV	14	5	25.00	90.00	73.68	51.72
MLD	46	7	82.14	85.71	97.56	75.38
SDL	40	1	71.42	98.00	97.56	75.36
SCV	45	10	80.35	80.00	81.81	74.43
SLD	47	17	83.92	65.30	75.43	78.04

Sn- Sensitivity, Sp- Specificity, PPV-Positive predictive value, NPV- Negative predictive value. All value with their 95% confidence intervals MDL: Motor distal latency, MCV: Motor conduction velocity, SDL: Sensory distal latency, SCV: Sensory conduction velocity, MLD: Motor latency difference, SLD: Sensory latency difference