Electromyographic and clinical findings suggest that epidural steroid injections (ESIs) can be beneficial for patients with chronic radicular pain due to disc herniation or spinal stenosis. The independent variables "MUR" and "SA" had a significant prognostic value for improving pain, as measured by the Visual Analog Scale (VAS). Specifically, MUR had an R-squared value of 0.287 (P = 0.032) and SA had an R-squared value of 0.277 (P = 0.036). Patients with disc herniation showed a greater improvement in mean difference between MUR/SA compared to those with spinal stenosis, indicating that ESIs may be more effective for patients with radicular LBP versus spinal stenosis in both short- and long-term pain relief. A statistically significant improvement was observed in MUR/SA for almost all nerve roots studied. Of the 39 patients included in the study, 20 (51.3%) experienced a significant improvement in VAS, Roland Morris score, DN4 score, and Brief Pain Inventory (BPI) scores, mainly within the first six months after treatment. Patients were assessed at three time points: before ESIs, as well as six and twelve months afterward, using both clinical (VAS 0-10, BPI, DN4, Rolland Morris, DASS, STAI) and electromyographic measures (evaluation of spontaneous activity [SA] and motor unit recruitment/interference pattern [IP/MUR]) to assess the improvement in pain. ![]() This prospective, open-label study aimed to investigate the short- and long-term electromyographic and clinical outcomes of patients with chronic radicular pain after ESIs. Epidural steroid injections are commonly used in the management of chronic lower back and leg pain.
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