Efficacy and Safety of Conservative Treatment Compared With Surgical Treatment for Thoracolumbar Fracture With Score 4 Thoracolumbar Injury Classification and Severity (TLICS): A Systematic Review and Meta-analysis.

STUDY DESIGN: This was a systematic review and meta-analysis. OBJECTIVE: The clinical outcomes, radiologic outcome, and complications were compared between surgical treatment and conservative treatment of thoracolumbar fractures with a Thoracolumbar Injury Classification and Severity (TLICS) score of 4. SUMMARY OF BACKGROUND DATA: The thoracolumbar fracture is the main reason leading to the spinal cord injury. Some studies suggested that the treatment of TLICS=4 is a "gray zone." Hence, the efficacy and safety of surgical treatment and conservative treatment of thoracolumbar fractures with scores 4 TLICS was still debated. MATERIALS AND METHODS: A comprehensive search of PubMed, Embase, and the Cochrane Library, Chinese National Knowledge Infrastructure (CNKI), Chongqing VIP Database (VIP), and Wan Fang Database was performed up to October 2021. Relevant studies were identified using specific eligibility criteria and data was extracted and analyzed based on primary and secondary outcomes. RESULTS: A total of 10 studies involving 555 patients were included (3 randomized controlled trials and 7 retrospective studies). There was no significant difference of hospital time (standardized mean difference=0.24, 95% CI: -1.50 to 1.97, P=0.79) and Oswestry Disability Index (mean difference=2.97, 95% CI: -1.07 to 7.01, P=0.15) between surgery and nonsurgery. The length of returning to work was shorter in surgical treatment (standardized mean difference=1.27, 95% CI: 0.07-2.46, P=0.04). Visual Analog Scale in surgical treatment was lower at 1, 3, and 6 months (respectively, P<0.00001, P=0.003, and P=0.02). However, there existed no significant difference between surgical treatment and nonsurgical treatment at 12 and >24 months (respectively, P=0.18 and 0.17). Cobb angle was lower in surgical treatment at postoperative at 6, 12, and >24 months (respectively, P=0.005, P<0.00001, P=0.002, and P=0.0002). Finally, the surgical treatment had a lower incidence of complications (odds ratio=3.89, 95% CI: 1.90-7.94, P=0.0002). CONCLUSIONS: Current evidence recommended that surgical treatment is superior to conservative treatment of TLICS score of 4 at the early follow-up. Surgical treatment had lower Cobb angle, Visual Analog Scale scores, and complications compared with a nonsurgical TLICS score of 4. However, these findings needed to be verified further by multicenter, double-blind, and large-sample randomized controlled trials.