Using Statistics to Determine the Tolerance Limits of Normal Values in Evoked Potential Testing
Eleftherios Stelios Papathanasiou, Michele Cleanthous, Savvas Papacostas · American Journal of Electroneurodiagnostic Technology · 1998
In evoked potential testing, tolerance limits are used to define parameters measured as normal or abnormal. These tolerance limits are calculated using means and standard deviations and depend on the samples having a Normal or Gaussian distribution. It is important to check samples for Normal distribution before calculating tolerance limits. When looking at interside differences during evoked potential testing, we have found that absolute values are less accurate than using the values obtained by subtracting values obtained from the right side from those on the left or vice versa.