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Table 5 Diagnostic accuracy of different electrodiagnostic parameters using ROC curve analysis

From: Quantitative motor unit potential analysis and nerve conduction studies for detection of subclinical peripheral nerve dysfunction in patients with compensated liver cirrhosis

Parameter AUC 95% CI for AUC P value Youden index J Associated criterion Sensitivity Specificity
Left ulnar SNAP conduction velocity 0.915 0.801/
0.975
< 0.0001* 0.762 ≤ 47.8 m/sc 76.19 100
Left ulnar SNAP peak latency 0.887 0.765/
0.959
< 0.0001* 0.607 > 2.8 ms 85.71 75
Left peroneal CMAP conduction velocity 0.885 0.764/
0.958
< 0.0001* 0.732 ≤ 48.3 m/s 85.71 87.5
Right ulnar CMAP latency 0.842 0.712/
0.930
< 0.0001* 0.613 > 3.1 ms 73.81 87.5
Right FDI number of phases 0.736 0.591/
0.852
0.0057* 0.439 > 3.7 43.9 100
Right FDI duration 0.733 0.588/
0.849
0.0375* 0.509 > 10 ms 63.41 87.5
Left EHL number of turns 0.732 0.586/
0.848
0.0025* 0.494 > 3.65 61.9 87.5
Left ulnar CMAP conduction velocity 0.726 0.582/
0.843
0.0704 0.554 ≤ 65.2 m/s 92.86 62.5
Left EHL duration 0.724 0.578/
0.842
0.016* 0.375 > 11.8 ms 50 87.5
Left ulnar SNAP amplitude 0.719 0.574/
0.837
0.0826 0.5833 ≤ 24.9 μV 83.33 75
Left EHL thickness 0.693 0.547/
0.816
0.0144* 0.4762 > 1.4286 47.62 100
Right FDI number of turns 0.613 0.463/
0.749
0.3092 0.2866 > 3 53.66 75
Left sural SNAP amplitude 0.607 0.431/
0.765
0.354 0.25 ≤ 6.7 μV 25 100
Left EHL number of phases 0.563 0.413/
0.704
0.4371 0.2143 > 4.3 21.43 100
  1. AUC, area under curve; CI, confidence interval; SNAP, sensory nerve action potential; CMAP, compound muscle action potential; FDI, first dorsal interosseous; EHL, extensor hallucis longus. * Significant P value < 0.05