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Association between loss of heterozygosity of chromosome 16q and survival in Wilms' tumor: A meta-analysis.
Pathology, Research and Practice 2018 November
BACKGROUND: Wilms' tumor (WT) is the most common pediatric renal tumor. Despite its high survival rate, the potential prognostic factors should further be studied to reduce the intensity of the treatment. A few studies have found LOH of 16q is associated with worse survival in patients with WT, but it is still contradictory. This study aimed to performed a meta-analysis to clarify this.
METHODS: Databases including the Wanfang, PubMed, Chinese National Knowledge Infrastructure, Embase, and Cochrane Library databases were searched July 2018. The meta-analysis was done using Stata (version 14.0). Publication bias was evaluated by funnel plots, Begg's test, and Egger's test. The trim-and-fill method was applied if significant publication bias existed. Sensitivity analysis was performed to evaluate the stability of the results.
RESULTS: This meta-analysis identified 9 cohort studies encompassing 3266 cases. The pooled relative risk when comparing LOH of 16q groups with control groups was 2.22 [95% confidence interval (CI) = 1.64-3.00, P < 0.001], and the pooled hazard ratio was 1.92 (95%CI = 1.32-2.80, P = 0.001). The results were stable after correcting for publication bias and performing a leave-one-out sensitivity analysis.
CONCLUSIONS: This meta-analysis indicated that LOH of 16q was significantly associated with worse survival in WT. Further studies need to identify this conclusion because the overall quality of the included studies is not high, investigate the impact of LOH of 16q on the survival of WT patients in different subgroups and identify better treatments for WT patients with LOH of 16q in order to lengthen their survival.
METHODS: Databases including the Wanfang, PubMed, Chinese National Knowledge Infrastructure, Embase, and Cochrane Library databases were searched July 2018. The meta-analysis was done using Stata (version 14.0). Publication bias was evaluated by funnel plots, Begg's test, and Egger's test. The trim-and-fill method was applied if significant publication bias existed. Sensitivity analysis was performed to evaluate the stability of the results.
RESULTS: This meta-analysis identified 9 cohort studies encompassing 3266 cases. The pooled relative risk when comparing LOH of 16q groups with control groups was 2.22 [95% confidence interval (CI) = 1.64-3.00, P < 0.001], and the pooled hazard ratio was 1.92 (95%CI = 1.32-2.80, P = 0.001). The results were stable after correcting for publication bias and performing a leave-one-out sensitivity analysis.
CONCLUSIONS: This meta-analysis indicated that LOH of 16q was significantly associated with worse survival in WT. Further studies need to identify this conclusion because the overall quality of the included studies is not high, investigate the impact of LOH of 16q on the survival of WT patients in different subgroups and identify better treatments for WT patients with LOH of 16q in order to lengthen their survival.
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