• Am J Phys Med Rehabil · Jan 2000

    Multicenter Study

    Effect of history and exam in predicting electrodiagnostic outcome among patients with suspected lumbosacral radiculopathy.

    • T D Lauder, T R Dillingham, M Andary, S Kumar, L E Pezzin, R T Stephens, and S Shannon.
    • Department of Physical Medicine and Rehabilitation, Mayo Clinic, Rochester, MN 55905, USA.
    • Am J Phys Med Rehabil. 2000 Jan 1; 79 (1): 60-8; quiz 75-6.

    ObjectiveTo determine the extent to which the history and physical examination predict the outcome of the electrodiagnostic (EDX) evaluation in patients with suspected lumbosacral radiculopathy.DesignData for 170 subjects referred for low-back and lower limb symptoms were prospectively collected at five EDX laboratories. The sensitivity, specificity, positive and negative predictive values, and odds ratios were determined for symptoms and neurologic signs.ResultsSymptoms were not significantly associated with an EDX study or a lumbosacral radiculopathy. The physical examination was better at predicting that an EDX study would be abnormal in general than it was at predicting a lumbosacral radiculopathy in particular. Of those subjects with normal physical examinations, 15%-18% still had abnormal EDX findings.ConclusionsIn a population of patients referred for an EDX study, the history and physical examination alone cannot reliably predict electrodiagnostic outcome.

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