TABLE 4

Individual Trends in Nerve Conduction Measurements

VariablenStarting Median or Fraction AbnormalPercentiles for Annual SlopesP
25thMedian75th
Median nerve
    Motor: abnormal300.20−0.000.000.039.42
    Motor: conduction velocity3150.00−2.96−0.431.101.24
    Motor: CMAP amp318.20−1.11−0.100.436.40
    Sensory: abnormality300.200.000.0000.048.048
    Sensory: conduction velocity2847.00−1.090.0791.001.86
    Sensory: amplitude3325.10−0.230.4300.890.061
Peroneal nerve
    Abnormal300.200.000.0100.234.0053
    Conduction velocity3044.00−4.97−1.0500.076<.001
    CMAP amplitude302.70−1.34−0.410−0.010.0019
Sural nerve
    Abnormal300.230.000.000.022.27
    Conduction velocity2744.00−1.97−0.3901.464.59
    Amplitude2720.90−4.98−0.9501.542.20
  • CMAP indicates compound muscle action potential.