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World Journal of Surgical Oncology
Published in: World Journal of Surgical Oncology 1/2016

Open Access 01-12-2016 | Research

p53 status correlates with the risk of progression in stage T1 bladder cancer: a meta-analysis

Authors: Jun Du, Shu-hua Wang, Qing Yang, Qian-qian Chen, Xin Yao

Published in: World Journal of Surgical Oncology | Issue 1/2016

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Abstract

Background

Published studies have yielded inconsistent results on the relationship between p53 status and the progression of stage T1 non-muscle invasive bladder cancer (NMIBC). Therefore, we performed a meta-analysis to evaluate the prognostic value of p53 in T1 NMIBC.

Methods

We systematically searched for relevant literatures in MEDLINE, EMBASE, and Web of Science. Data were pooled together from individual studies, and meta-analysis was performed. Study quality was assessed using the Newcastle-Ottawa Scale. Pooled risk ratios (RRs) and 95 % CI were calculated to estimate the effect sizes. Moreover, subgroup analyses were carried out.

Results

A total of 12 studies comprising 712 patients were subjected to the final analysis. p53 overexpression was significantly associated with higher progression rate of T1 NMIBC (RR 2.32, 95 % CI 1.59–3.38). Moderate heterogeneity was observed across the studies (I 2 = 39 %, P < 0.0001). In a subgroup analysis stratified by stage, p53 overexpression was a predictor of progression in T1 grade 3 NMIBC (RR 2.71, 95 % CI 1.31–5.64). In addition, in a subgroup analysis stratified by intravesical therapy, p53 overexpression was a predictor of progression in T1 NMIBC received Bacillus Calmette-Guérin intravesical therapy (RR 3.35, 95 % CI 1.89–5.93). Furthermore, after excluding the study that possibly contributed to the heterogeneity by the sensitivity analysis, the association p53 overexpression was significantly correlated with progression of T1 NMIBC (RR 2.74, 95 % CI 2.05–3.65) without evidence of heterogeneity (I 2 = 0 %, P < 0.0001).

Conclusions

This meta-analysis suggested that p53 overexpression may be associated with progression of T1 NMIBC patients. Because of the heterogeneity and other limitations, further studies with rigid criteria and large populations are still warranted to confirm our findings.
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Metadata
Title
p53 status correlates with the risk of progression in stage T1 bladder cancer: a meta-analysis
Authors
Jun Du
Shu-hua Wang
Qing Yang
Qian-qian Chen
Xin Yao
Publication date
01-12-2016
Publisher
BioMed Central
Published in
World Journal of Surgical Oncology / Issue 1/2016
Electronic ISSN: 1477-7819
DOI
https://doi.org/10.1186/s12957-016-0890-9

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