Abstract
Many studies have explored the relationship between the expression level of miRNAs and the prognosis of patients with laryngeal cancer (LC). However, the prognostic value of miRNA in LC patients has not been comprehensively evaluated. PubMed, Web of Science, Embase, and Cochrane Database of Systematic Reviews were extensively searched for all studies published before the end of February 2020 that investigated the correlation between miRNA expression level and clinical prognosis in patients with LC. Twenty-one studies involving 1784 patients were included in our meta-analysis. The survival endpoints of OS and DFS were 1.69 (95% CI 1.45-1.98; p < 0.05) and 3.62 (95% CI 2.34-5.62; p < 0.05), respectively. Both OS and DFS results were statistically significant. Subgroup analyses were performed by evaluating the effects of miR-196b, miR-375, and miR-21 on OS and the effects of miR-34c-5p on DFS. The results obtained for miR-196b and miR-34c-5p were statistically significant. The results indicate that miRNAs, as prognostic biomarkers for LC, play an important role in clinical value. In particular, miR-196b and miR-34c-5p have the potential to be used as prognostic biomarkers. However, further large-scale cohort studies based on these miRNAs are urgently needed to validate their clinical value and help determine the direction of future clinical work in the area.
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