The sensitivity of median versus ulnar palmar mixed nerve study in the early diagnosis of carpal tunnel syndrome

Egyptian Rheumatology and Rehabilitation

Table 4 Diagnostic value of provocative electrophysiological comparative tests in the diagnosis of early CTS

Technique	Sensitivity	Specificity	PPV	NPV	AUC	95% confidence interval
Technique	Sensitivity	Specificity	PPV	NPV	AUC	Lower bound	Upper bound
MVR	92.2	94.4	97	85.9	96.5	0.914	1.000
MVU	78.2	91.5	94.9	67.7	89.4	0.763	1.000
LM-IN	66.9	90.1	84.8	57.6	83.7	0.643	1.000
Mix M-U	85.2	93	96	75.8	92.9	0.839	1.000

PPV, positive predictive value; NPV, negative predictive value; AUC, area under curve; MVR, median versus ulnar sensory study; MVU, median versus ulnar sensory study; LM-IN, median versus ulnar lumbrical- interossei motor study; Mix M-U, median versus ulnar palmar mixed nerve study