ArticleResearch square2023
Impact of Environmental Temperature on the Pathological Complete Response and Survival Outcomes of Breast Cancer: A NCDB and SEER study.
Article in Research square, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: Experimental evidence in tumor-bearing mouse models shows that exposure to cool, that is, sub-thermoneutral environmental temperature is associated with a higher tumor growth rate with an immunosuppressive tumor immune microenvironment than seen at thermoneutral temperatures. However, the translational significance of these findings in humans is unclear. We hypothesized that breast cancer patients living in warmer climates have higher odds of achieving pathologic complete response (pCR) and better survival outcomes than patients living in colder climates. Methods: A retrospective population-based analysis was conducted on Stage I-III breast cancer patients utilizing data from National Cancer Database (NCDB) from 2010-2018 with 892,092 patients and Surveillance, Epidemiology and End Results (SEER) from 1996-2017 with 270,496 patients. The average annual temperature (AAT) was calculated based on data from the National Centers for Environmental Information. Results: In the SEER cohort, patients residing at AAT ≥47.5°F had a 16% higher overall survival (OS) (HR 0.84, 95% CI 0.81-0.88, p <0.001) and 15% higher disease specific survival (DSS) (HR 0.85, 95% CI 0.80 - 0.90; p <0.001). Similarly, 4% higher OS (HR 0.96, 95% CI 0.95-0.97, p <0.001) and DSS (HR 0.96, 95% CI 0.94-0.97, p <0.001) was noted with every 5°F increment in AAT. In the NCDB cohort, patients in regions with AAT ≥ 60.9°F had 9% greater odds of achieving a pCR, odds ratio (OR 1.09, 95% CI 1.05, 1.13, p <0.001) and a 5% higher OS (HR 0.95, 95% CI 0.93 - 0.97, p<0.001). Conclusions: Higher environmental temperatures are associated with significantly better OS and DSS, as well as higher odds of achieving pCR in these patients. Future research is warranted to confirm this observation using large datasets, to elucidate the underlying mechanisms and investigate novel therapeutic strategies to minimize this geographic disparity in clinical outcomes.
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