![]() 10įinally, EMG interpretation may be influenced by clinical information this is termed confirmation bias. One study reports 54%–58% specificity for any EMG abnormality. 4, – 9 Studies of specificity are limited. The sensitivity of EMG for the diagnosis of radiculopathy ranges from 36% to 64% in patients with only pain, 2, – 4 and 51%–86% in patients with an abnormal examination. ![]() Validity reflects the ability of EMG to identify radiculopathy accurately, and is often measured as sensitivity and specificity. While there are no studies evaluating EMG intrarater reliability, interrater reliability has been previously reported to be 60.5% among faculty-level electromyographers. Reliability measures the extent to which EMG provides consistent results, when repeated by the same electromyographer at different time points (intrarater reliability), or by different electromyographers (interrater reliability). ![]() Several factors influence the diagnostic accuracy of EMG. EMG is frequently used to assess radiculopathy due to degenerative disc disease. ![]()
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