Abstract PS8-03: Inflammation and coagulation biomarkers associated with physical resilience in older women receiving chemotherapy for early breast cancer

Background: Physical resilience, the ability to resist decline and maintain functional status despite a stressor such as chemotherapy, is a central aspect of successful aging. Understanding clinical and biological factors associated with resilience in older women receiving chemotherapy for early breast cancer may facilitate the development of targeted interventions to maintain an individual’s robustness.Methods: Women age ≥65 (N=406) with Stage I-III breast cancer who were part of a clinical study of neo/adjuvant chemotherapy in older women were recruited from 16 sites (NCT01472094, R01AG037037). The Deficit Accumulation Index (DAI), a continuous score (0-1) calculated based on 51-items from geriatric assessment data (Cohen et al Cancer 2017), was measured before and after receipt of chemotherapy. DAI was categorized as robust (0.0 12 weeks, and 74% received primary prophylaxis with WBC growth factors. Among these 324 robust older women, 253 (78%) remained robust (resilient) at the end of chemotherapy, 63 (19%) became prefrail, and 8 (3%) became frail. In univariate analyses, patients treated with anthracycline (OR=0.63, p=0.09), planned duration of treatment \u003e 12 weeks (OR=0.56, p=0.04), elevated IL-6 ≥2.7 pg/ml (OR=0.59, p=0.05), elevated CRP ≥4.3 μg/ml (OR=0.57, p=0.04), elevated D-dimer ≥0.7 μg/ml (OR=0.61, p=0.07), or at least one elevated biomarker (OR=0.18, p Conclusions: In this cohort of older women with early breast cancer who were robust prior to initiation of chemotherapy, 22% became prefrail or frail at end of treatment. Resilience to chemotherapy was related to inflammatory and coagulation biomarkers. Further research is needed to examine the mechanism underlying why some older women are resilient and retain their robustness after receiving treatment, whereas others experience decline, and further explore the role of inflammation/coagulation in this phenomenon. Citation Format: Mina S Sedrak, Canlan Sun, Hyman Muss, Rachel A. Freedman, Allison Magnuson, Cary P. Gross, William P. Tew, Heidi D. Klepin, Tanya M. Wildes, Efrat Dotan, Tracey O9Connor, Mary Ann Fenton, Ruby Sharma, Andrew Chapman, Cynthia Owusu, Selina Chow, Heeyoung Kim, Vani Katheria, Mark LaBarge, William Dale, Saro Armenian, Susan Neuhausen, Harvey J. Cohen. Inflammation and coagulation biomarkers associated with physical resilience in older women receiving chemotherapy for early breast cancer [abstract]. In: Proceedings of the 2020 San Antonio Breast Cancer Virtual Symposium; 2020 Dec 8-11; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2021;81(4 Suppl):Abstract nr PS8-03.