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Table 1 Parameters for Nerve Conduction Study Classification

From: The WISTAH hand study: A prospective cohort study of distal upper extremity musculoskeletal disorders

  Classification Transcarpal Delta* Sensory Latency Motor Latency
  Normal ≤ 0.85 ms ≤ 3.70 ms ≤ 4.50 ms
Abnormal Mild > 0.85 ms ≤ 3.70 ms ≤ 4.50 ms
  Moderate > 0.85 ms > 3.70 ms ≤ 4.50 ms
  Severe > 0.85 ms
or absent
> 3.70 ms > 4.50 ms
  1. * Transcarpal Delta = (median nerve sensory latency – ulnar nerve sensory latency).