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1 Department of Radiology, Division of Musculoskeletal Imaging, University of
Wisconsin Hospitals and Clinics, Clinical Science Center E3/311, 600 Highland
Ave., Madison, WI 53792-3252.
2 Department of Statistics and Department of Biostatistics & Informatics,
University of Wisconsin, Madison, WI 53792-3252.
OBJECTIVE. Epidural corticosteroid injections have been used extensively to treat lower back pain, but the relative effectiveness of one corticosteroid versus another has never been reported in a large patient series. We retrospectively reviewed 597 patients who had epidural corticosteroid injections to determine any difference in Kenalog or Celestone efficacy.
MATERIALS AND METHODS. We reviewed charts and self-reported pain score evaluations of 597 patients who received either Kenalog or Celestone Soluspan as an epidural injection for the treatment of lower back pain from 1997 to 2002 at our university hospital and affiliated Veterans Affairs hospital. Kenalog was used for the initial 2 years and Celestone was used for the next 3 years. Fluoroscopic guidance was used to confirm epidural location, and each patient was injected with a mixture of 5 mL of 0.5% preservative-free lidocaine and 2 mL of either Kenalog 40 mg/mL (triamcinolone acetonide injectable suspension) or Celestone Soluspan 6 mg/mL (betamethasone sodium phosphate and betamethasone acetate injectable suspension). Each patient was given a standardized pain evaluation sheet that used an 11-point scale for initial pain severity. Scoring of pain compared with baseline during the following 14 days was based on a 5-point scale of pain improvement or worsening.
RESULTS. On days 0–3 after the procedure, no statistical significance in improvement of lower back and buttock pain was seen between groups. On day 7, 59% of Celestone recipients and 73% of Kenalog recipients showed improvement in lower back pain (p = 0.002, Pearson's chi-square test), and 58% of Celestone recipients and 75% of Kenalog recipients had improvement in leg or buttock pain (p < 0.001). On day 14, 54% of Celestone recipients and 71% of Kenalog recipients showed improvement in lower back pain (p < 0.001), and 54% of Celestone recipients and 71% of Kenalog recipients had improvement in leg or buttock pain (p < 0.001).
CONCLUSION. The epidural injection of Celestone Soluspan and Kenalog reduced lower back and radicular pain in more than half the patients, although Kenalog reduced pain in a significantly larger number of patients than Celestone Soluspan at 1 and 2 weeks after injection.
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