![]() The areas under the curve (AUC) of the receiver-operating characteristic (ROC) curve and the kappa value were used to evaluate the accuracy of the SEMG diagnostic model. The accuracy, sensitivity, and specificity values were calculated separately. The root mean square (RMS), the RMS peak time, the mean power frequency (MPF), and the median frequency (MF) were analyzed. SEMG signals from the bilateral tibialis anterior and lateral gastrocnemius were measured. This study recruited 24 patients with L 5 nerve root compression and 23 patients with S 1 nerve root compression caused by LDH from May 2014 to May 2016. To establish a logistic regression model using surface electromyography (SEMG) parameters for diagnosing the compressed nerve root at L 5 or S 1 level in patients with lumbar disc herniation (LDH).
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