Efficacy of Transforaminal Epidural Steroid and Its Combination With Ozone in Lumbar Radiculopathy

Inclusion Criteria: * Files of patients underwent transforaminal epidural steroid or combination of steroid and ozone injection * Age between 18-75 years * Body mass index (BMI) \<35, * VAS score ≥ 4 * Radicular pain not responding to conservative therapy related to lumbar disk herniation on magnetic resonance imaging * Duration of pain of \>3 months Exclusion Criteria: * Pregnancy * Major progressive neurologic deficits * Infective or inflammatory diseases * Uncontrolled diabetes or other severe internal comorbidities * Malignancy * international normalized ratio (INR) \> 1.2 * Glucose-6-phosphate dehydrogenase deficiency