Unilateral biportal endoscopic discectomy versus microdiscectomy for lumbar disc herniation: a systematic review and meta-analysis

Purpose This study aimed to compare unilateral biportal endoscopic discectomy (UBED) with microdiscectomy (MD) for treating lumbar disk herniation (LDH). Methods A comprehensive literature search was conducted in the Embase, PubMed, Cochrane Library, CNKI, and Web of Science databases from database inception to April 2023 to identify studies comparing UBED and MD for treating LDH. This study evaluated the visual analog scale (VAS) score, Oswestry disability index (ODI), Macnab scores, operation time, estimated blood loss, hospital stay, and complications, estimated blood loss, visual analog scale (VAS) score, Oswestry disability index (ODI), and Macnab scores at various pre- and post-surgery stages. The meta-analysis was performed using RevMan 5.4 software. Results The meta-analysis included 9 distinct studies with a total of 1001 patients. The VAS scores for low back pain showed no significant differences between the groups at postoperative 1–3 months ( P = 0.09) and final follow-up ( P = 0.13); however, the UBED group had lower VAS scores at postoperative 1–3 days ( P = 0.02). There were no significant differences in leg pain VAS scores at baseline ( P = 0.05), postoperative 1–3 days ( P = 0.24), postoperative 1–3 months ( P = 0.78), or at the final follow-up ( P = 0.43). ODI comparisons revealed no significant differences preoperatively ( P = 0.83), at postoperative 1 week ( P = 0.47), or postoperative 1–3 months ( P = 0.13), and the UBED group demonstrated better ODI at the final follow-up ( P = 0.03). The UBED group also exhibited a shorter mean operative time ( P = 0.03), significantly shorter hospital stay ( P