Background
: The purpose of this study was to evaluate the efficacy of caudal epidural steroid injection with local anesthetic for chronic lower back pain patients.

Methods : The 152 patients with lower back pain were selected for the study. The patients were treated with the caudal injections of steroid (triamcinolone acetate 40 mg) and local anesthetics (1% lidocaine 17 ml). The efficacy of caudal injections was assessed with the visual analogue scale (VAS) before procedure and at 8 weeks following procedure.

Results : The VAS scores of 'Before procedure' group and '8 weeks after procedure' group were 62±23 and 31±15, respectively. The caudal steroid injections provided effectiveness in treating various lower back pain diseases except postlaminectomy syndrome.

Conclusion : We consider that caudal epidural injections of steroid and local anesthetics are effective for patients with chronic lower back pain in the short term.