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The benefit of treatment beyond progression with immune checkpoint inhibitors: a multi-center retrospective cohort study

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Abstract

Objective

Treatment beyond progression (TBP) with immune checkpoint inhibitors (ICIs) is an evolving field due to the limitations of conventional imaging in response evaluation. However, real-life data on the benefit of TBP is scarce, especially from the limited resource settings and patients treated in the later lines. Therefore, we aimed to investigate the survival benefit of TBP with ICIs in patients with advanced tumors from a limited resource setting.

Methods

For this multi-center retrospective cohort study, we included 282 patients treated with ICIs and had radiological progression according to RECIST 1.1 criteria. We evaluated post-progression survival according to the use of TBP (TBP and non-TBP groups) with univariate and multivariate analyses.

Results

The cohort’s median age was 61, and 84.4% were treated in the second or later lines. 82 (29.1%) of 282 patients continued on ICIs following the initial progression. In multivariate analyses, patients in the TBP group had improved post-progression survival compared to non-TBP (13.18 vs. 4.63 months, HR: 0.500, 95% CI: 0.349–0.717, p < 0.001). The benefit of the TBP was independent of the tumor type, treatment line, and age. Furthermore, TBP with ICIs remained associated with improved post-progression survival (HR: 0.600, 95% CI: 0.380–0.947, p = 0.028) after excluding the patients with no further treatment after progression in the non-TBP arm.

Conclusions

In this study, we observed that patients receiving ICIs beyond progression had considerably longer survival. Continuation of ICIs after progression should be considered a reasonable management option for patients with advanced cancer, specifically for patients with limited alternative options.

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Data availability

All primary data are the responsibility of the authors, who agree to enable the journal to review it if required.

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Funding

This research received no external funding.

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Authors and Affiliations

Authors

Contributions

Conceptualization DCG, and SK, EY; data curation, EE, TKS, GK and SCY; formal analysis, DCG and EY; investigation, DCG, EY, SA, SY, YU; methodology, DCG, EY and SA; supervision, SK, SY, SA, DCG, ME, YU writing—original draft, DCG and EY; writing—review & editing, DCG, EE, SK, SY, SA, YU The published version of the work has been reviewed and approved by all authors.

Corresponding author

Correspondence to Deniz Can Guven.

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Conflicts of interest

The authors declare no conflict of interest.

Ethical approval

All techniques used in studies involving human subjects complied with the institutional and/or national research committee's ethical requirements, as well as the 1964 Helsinki statement and its subsequent revisions or similar ethical standards. The study was authorized by Istinye University's ethical committee.

Informed consent

Because of the study’s nature (retrospective cohort study), the need for informed consent was waived by the ethical committee.

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Guven, D.C., Yekeduz, E., Erul, E. et al. The benefit of treatment beyond progression with immune checkpoint inhibitors: a multi-center retrospective cohort study. J Cancer Res Clin Oncol 149, 3599–3606 (2023). https://doi.org/10.1007/s00432-022-04268-8

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  • DOI: https://doi.org/10.1007/s00432-022-04268-8

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