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Abstract
Controversy still exists with regard to the prognostic value of prognostic nutritional index (PNI) in ovarian cancer. A systematic search based on the databases of Web of Science, Embase, PubMed, Chinese National Knowledge Infrastructure (CNKI) and WanFang Dataset were conducted up to March 22, 2022. We included both retrospective and prospective observational studies with comparison of prognosis of patients who were divided into two groups: low and high PNI group. The Newcastle–Ottawa Scale (NOS) was applied to evaluate the quality of enrolled studies. All analyses were performed using Stata software. The pooled results were reported as hazard ratios (HRs) with the 95% confidence intervals (95% CIs). Finally, 12 studies involving 3,190 patients were included. High PNI group had a significantly improved overall survival (OS, HR: 0.67, 95% CI: 0.53–0.84), progression-free survival (PFS, HR: 0.74, 95% CI: 0.63–0.87), and cancer-specific survival (CSS, HR: 0.43, 95% CI: 0.20–0.94) compared with the low PNI group. The sensitivity analysis and publication bias indicated our results were reliable. PNI could be applied as a promising index to predict prognosis in ovarian cancer. Our results need to be validated in future studies.
Authors’ Contributions
Hongqin Chen conceived and designed the analyses. Xi Tan and Hongqin Chen performed the literature search and selection, collected data, conducted statistical analyses and wrote the paper. All authors contributed substantially to its revision.
Disclosure Statement
The authors declare that there are no competing interests associated with this manuscript.
Ethical Approval
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. For this type of study, formal consent is not required.
Funding
The author(s) reported there is no funding associated with the work featured in this article.
Data Availability Statement
All data used in this meta-analysis were presented in the manuscript.