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Impact of Different Approaches of Epidural Steroid Injection on Outcome of Patients Treated for Low Backache.

OBJECTIVES: The objective of this study was to evaluate the clinical efficacy of epidural steroid injections through different approaches using pain relief and improvement in functional capacity as outcome measures.

MATERIALS AND METHODS: Sixty patients with low backache and unilateral radiculopathy were randomly assigned to three groups of twenty patients each, for undergoing lumbar epidural steroid injection (LESI) through midline, transforaminal, and paramedian approaches under fluoroscopic guidance. All the patients were assessed at 1 week, 1 month and 3 months postintervention using visual analog scale (VAS) score, Quebec disability score, and depression score.

RESULTS: The primary and secondary outcome measured in terms of improvement of VAS showed statistically significant reduction (P < 0.05) when compared to preprocedure baseline readings on both intragroup analysis (Groups I, II and III) at 1-week, 1-month, and 3-month follow-up. However, on intergroup comparison, the difference in improvement of VAS score noted was statistically insignificant with P value of 0.07 (Group I/II), 0.19 (Group II/III), 0.85 (Group I/III) at final 3rd month follow-up. In addition, intergroup comparison for secondary outcome showed statistically insignificant improvement (P value for Quebec score 0.73 [Group I/II], 0.34 [Group II/III], 0.79 [Group I/III] and depression score 0.78 [Group I/II], 0.67 [Group II/III], 0.98 [Group I/III]) at final 3rd month follow-up.

CONCLUSIONS: All three LESI approaches proved highly effective individually in terms of short-term pain relief, improvement in the quality of life, and depression; however, none proved to be better than the other.

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