Background: Neoadjuvant chemotherapy has been used for treatment of cervical cancer for a long time; however, the role of early non-response on prognosis is still confusing. This study was designed to assess its impact on disease-free survival (DFS).
Methods: Databases "PubMed", "Embase" and the "Cochrane Library" were searched out through May 2020, and both random effects model and fixed effect model were employed to calculate the main pooled results. I2 and Cochrane Q test were used to test the heterogeneity among the studies. Funnel plot with Begg's and Egger's tests was used to assess the publication bias that may exist in the study. Sensitivity analysis was performed to detect the origin of the heterogeneity.
Results: A total of 1,349 articles were found at first; then, after several rounds of exclusion, we identified 8 articles with 9 studies which were accordant with the standards of the inclusion. A combined analysis was performed among the 1,462 responders and 490 non-responders. For 1-year DFS, sub-analysis showed hazard ratio (HR) was 0.25 (95% CI: 0.14-0.43) using RECIST criteria; and HR was 0.52 (95% CI: 0.36-0.75) using WHO criteria; Egger's test showed that P=0.35 for RECIST criteria and P=0.57 for WHO criteria; Begg's test showed P=0.34 for RECIST criteria and P=0.60 for WHO criteria. For 3-year DFS, HR was 0.26 (95% CI: 0.16-0.43) using RECIST criteria and was 0.47 (95% CI: 0.30-0.73) using WHO criteria. For 5-year DFS, HR was 0.26 (95% CI: 0.16-0.42) using RECIST criteria and was 0.49 (95% CI: 0.33-0.71) using WHO criteria.
Discussion: Early non-response to neoadjuvant chemotherapy was significantly associated with higher recurrence of cervical cancer. Prospective randomized studies are warranted to validate this finding.
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