Predictors of Clinical Response After Interlaminar Cervical Epidural Steroid Injection for Cervical Radiculopathy

This retrospective cohort study will review the medical records of patients who presented to the Pain Clinic of Mersin University Faculty of Medicine Hospital between January 1, 2018, and October 1, 2025, with neck pain related to cervical disc herniation and underwent interlaminar cervical epidural steroid injection. The study population will consist of adult patients who were diagnosed and/or followed by physicians in the research team, had neck pain associated with cervical disc herniation for at least 1 month and provided written informed consent for the procedure. Patients will be excluded if they had an active infection at the time of injection, a history of allergy to local anesthetic or contrast agents or a bleeding diathesis. Data will be collected from existing medical records using a standardized data collection form. Variables of interest will include age, sex, duration of pain, clinical diagnosis, type of corticosteroid used, presence of fibromyalgia, use of transcutaneous electrical nerve stimulation (TENS), history of trigger point injection, electromyography findings and Numeric Rating Scale (NRS-11) pain scores recorded before the procedure and at 1-month and 6-month follow-up. The primary aim of the study is to identify demographic, clinical, and procedure-related factors associated with clinical response after interlaminar cervical epidural steroid injection in patients with cervical radiculopathy related to cervical disc herniation.