116 patients were randomized to evaluate the efficacy of caudal epidural steroid injection in improving pain and function for patients with chronic lumbar radiculopathy. Patients received either subcutaneous sham injections of 2 mL 0.9% saline, caudal epidural injections of 30 mL 0.9% saline, or caudal epidural injections of 40 mg triamcinolone acetonide in 29 mL 0.9% saline. The assessment revealed that there were no significant differences in pain, function, or health-related quality of life between the treatments at any follow-up period (weeks 6, 12, and 52).