Does Injection Target Matter in Sacroiliac Joint Dysfunction?

This retrospective comparative cohort study aims to compare the short-term clinical outcomes of ultrasound-guided sacroiliac joint (SIJ) injection, combined SIJ and multifidus injection, and multifidus injection alone in patients with sacroiliac joint dysfunction. Medical records of patients who underwent ultrasound-guided injection procedures were retrospectively reviewed and classified into three groups according to the documented injection target: SIJ injection alone, combined SIJ and multifidus injection, and multifidus injection alone. The primary outcome is the change in pain intensity during movement, assessed using the Visual Analog Scale (VAS) from baseline to 30 minutes after injection. Pain outcomes at one week and changes in functional measures, including the Roland-Morris Disability Questionnaire and Oswestry Disability Index, are evaluated as secondary outcomes. The study aims to determine whether short-term pain and functional outcomes differ according to the injection target.