Press Releases

New Study Shows Racial and Ethnic Disparities in Cardiovascular Mortality Among Cancer Survivors
May 26, 2022
The American Cancer Society led research to be presented at the 2022 ASCO annual meeting

American Cancer Society,

ASCO Abstract #12075

ATLANTA, May 26, 2022 — A new large national study led by researchers at the American Cancer Society (ACS) shows the mortality risk from cardiovascular disease (CVD) differs considerably among cancer survivors by race/ethnicity and cancer types. The findings will be presented at this year’s annual meeting of the American Society of Clinical Oncology (ASCO) in Chicago, June 3-7.

In this study, researchers led by Dr. Hyuna Sung, principal scientist, cancer surveillance research at the American Cancer Society and lead author of the study, used data from almost three million survivors of the top 23 cancers diagnosed at ages 20 to 64 years during 2000-2018 obtained from 17 Surveillance, Epidemiology, and End Results registries. Risks for CVD death among survivors relative to the general population were calculated using standardized mortality ratios (SMRs) in each racial/ethnic group: Non-Hispanic White (NHW), Non-Hispanic Black (NHB), Hispanic, Non-Hispanic Asian or Pacific Islander (API), and Non-Hispanic American Indian (AI). Among survivors, the risks were compared by race/ethnicity using cause-specific proportional hazards models for competing risks, controlling for year of diagnosis, age at diagnosis, sex, stage (when appropriate), and the first course of treatment receipt (surgery, radiotherapy, chemotherapy).

The results showed among 2,806,515 survivors (NHW, 68%; NHB, 13%; Hispanic, 12%; API, 7%; AI, 0.5%), 57,883 CVD deaths occurred during 6.4 person-years of mean follow-up. Cancer survivors overall were at increased risk of CVD death compared to the general population with an SMR of 1.76 among API, 1.49 among AI, 1.46 among Hispanic, 1.30 among NHB, and 1.13 among NHW survivors. Compared with NHW survivors, the adjusted hazard of CVD death was statistically significantly higher among NHB survivors for 23/23 cancers and among AI survivors for 9/18 cancers but was statistically significantly lower among Hispanic survivors for 5/23 cancers and among API survivors for 10/23 cancers, with no significant difference otherwise. The highest hazard ratios (HRs) were among NHB survivors of melanoma; breast; pancreatic; and testicular cancers, whereas the lowest HRs were among API survivors of head and neck and cervical cancers and Hispanic survivors of cervical cancer.

Study authors highlight the need for targeted prevention and surveillance in primary care and for future studies to identify factors that contribute to this variation to inform efforts towards mitigating risk.

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