Journal
CANCERS
Volume 13, Issue 10, Pages -Publisher
MDPI
DOI: 10.3390/cancers13102352
Keywords
combination of immune checkpoint inhibitors and radiotherapy; radiation oncology and immunity; radiation oncology; immunotherapy
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The combination of immune checkpoint inhibitors (ICI) plus radiotherapy (RT) in advanced or metastatic non-small cell lung cancer (NSCLC) patients significantly increases 1- and 3-year overall survival and progression-free survival, compared to ICI or RT alone, according to the study findings.
Background: Immune checkpoint inhibitors (ICI) plus radiotherapy (RT) have been suggested as an emerging combination in non-small cell lung cancer (NSCLC) patients. However, little is known about the magnitude of its benefits and potential clinical predictors. Objective: To assess the effects of this combination on the increase in overall and progression-free survival. Data sources: The MEDLINE and CANCERLIT (1970-2020) electronic databases were searched, and the reference lists of included studies were manually searched. Study selection: Studies were included if they were comparative studies between combination ICI-RT and ICI or RT alone in advanced or metastatic NSCLC patients. Overall survival (OS) was analyzed according to the treatment strategy. Data extraction: Data on population, intervention, and outcomes were extracted from each study, in accordance with the intention-to-treat method, by two independent observers and combined using the DerSimonian method and Laird method. Results: Compared to ICI or RT alone, ICI-RT significantly increased the 1-year and 3-year OS RR by 0.75 (95% CI 0.64-0.88; p = 0.0003) and 0.85 (95% CI 0.78-0.93; p = 0.0006), respectively. Furthermore, there was a statistically significant benefit on 1- and 3-year progression-free survival (RR 0.73 (95% CI, 0.61-0.87; p = 0.0005) and RR 0.82 (95% CI 0.67-0.99; p = 0.04), respectively). Conclusions: In patients with advanced or metastatic NSCLC, combination ICI-RT increases 1- and 3-year OS and progression-free survival compared to ICI or RT alone.
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