1. Prognostic value of systemic immune-inflammation index in patients with small-cell lung cancer treated with immune checkpoint inhibitors.
- Author
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Hamakawa Y, Hirahara A, Hayashi A, Ito K, Shinohara H, Shiba A, Higashi Y, Aga M, Miyazaki K, Taniguchi Y, Misumi Y, Agemi Y, Nakamura Y, Shimokawa T, and Okamoto H
- Subjects
- Humans, Male, Female, Prognosis, Aged, Retrospective Studies, Middle Aged, Inflammation, Aged, 80 and over, Progression-Free Survival, Adult, Kaplan-Meier Estimate, Small Cell Lung Carcinoma drug therapy, Small Cell Lung Carcinoma immunology, Small Cell Lung Carcinoma mortality, Immune Checkpoint Inhibitors therapeutic use, Lung Neoplasms drug therapy, Lung Neoplasms immunology, Lung Neoplasms mortality, Lung Neoplasms pathology
- Abstract
Introduction: The systemic immune-inflammation index (SII) has emerged as a promising prognostic marker in various malignancies. However, its prognostic significance in patients with small-cell lung cancer (SCLC) treated with immune checkpoint inhibitors (ICIs) remains unclear. In this study, we evaluated the prognostic impact of the SII in patients with SCLC after ICI use., Methods: Of 62 patients with SCLC who received chemoimmunotherapy at our institution between September 2019 and July 2024, we retrospectively analyzed 36 patients who subsequently received ICI maintenance therapy following the initial chemoimmunotherapy treatment. The SII was calculated at the start of the second cycle of the ICI maintenance therapy. Patients were stratified into high (≥ 570) and low (< 570) SII groups. Overall survival (OS) and progression-free survival (PFS) were compared between the groups using the Kaplan-Meier method and log-rank test. Multivariate analysis using the Cox proportional hazards model was performed to identify independent prognostic factors., Results: The high SII group exhibited a significantly shorter OS (median 12.1 vs. 24.1 months, P = 0.010) and PFS (median 5.2 vs. 8.1 months, P = 0.026) than those in the low SII group. A multivariate analysis identified SII ≥ 570 as an independent negative prognostic factor for OS (hazard ratio 3.83, 95% confidence interval 1.38-10.6, P = 0.010)., Conclusions: Elevated SII in the initial phase of ICI maintenance therapy was associated a with poor prognosis in patients with SCLC, supporting its utility as a prognostic biomarker in this setting. Therefore, prospective validation is required to confirm these findings., Competing Interests: Declarations. Ethics approval and consent to participate: This study was conducted in accordance with the ethical principles outlined in the Declaration of Helsinki and was approved by the Institutional Review Board of Yokohama Municipal Citizen’s Hospital. The requirement for individual informed consent was waived by the ethics committee due to the retrospective nature of the study and the use of anonymized data from existing medical records. This waiver was granted based on the following considerations: the noninvasive nature of the study, the use of only anonymized data with adequate measures to protect personal information, the impracticality of contacting the study subjects, and the minimal risk of infringing upon the rights or interests of the patients involved. All data were handled confidentially and in compliance with relevant privacy laws and regulations. The study protocol ensured that the research objectives could be achieved without compromising patient privacy or the ethical standards of medical research. Consent for publication: Not applicable. Competing interests: The authors declare no competing interests., (© 2025. The Author(s).)
- Published
- 2025
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