Key result
Non-cancer causes account for ~49% of deaths among breast cancer survivors at 10 years.
Why the study?
With steadily rising survival rates, the cause-of-death landscape for breast cancer patients is evolving, prompting this study to delineate mortality patterns and demographic disparities to inform survivorship strategies.
Mortality in breast cancer survivors is shifting toward non-cancer causes, highlighting the need for risk-stratified survivorship care integrating cardiovascular and psychosocial monitoring.
Supports monitoring non-cancer causes in survivors; leaves open demographic-specific intervention trials.
Background With steadily rising survival rates, the cause-of-death landscape for breast cancer patients is evolving. This study aims to delineate mortality patterns and demographic disparities to inform long-term survivorship strategies. Methods We performed a retrospective analysis of 839,698 breast cancer patients from U.S. population-based registries (2000–2021). Standardized Mortality Ratios (SMRs) and Incidence Rate Ratios (IRRs) were calculated to assess the risk of non-cancer deaths across age and racial/ethnic groups. Results By 10 years of follow-up, 48.6% of all deaths were attributed to non-cancer causes. Significant disparities emerged: Black patients (aged 0-54) exhibited the highest all-cause mortality risk (IRR: 1.70; 95% CI: 1.66–1.74), whereas Asian/Pacific Islanders (aged 65-74) showed the lowest (IRR: 0.67; 95% CI: 0.65–0.69). Notably, patients faced drastically elevated risks for external causes, including suicide (SMR: 17.4; 95% CI: 16.1–18.8) and homicide (SMR: 10.1; 95% CI: 8.37–12.13), alongside cardiovascular/non-cancer diseases. Conclusion Mortality in breast cancer survivors is progressively shifting from malignancy to non-cancer causes, with distinct racial and age-dependent patterns. These findings necessitate a paradigm shift toward personalized, risk-stratified survivorship care that integrates cardiovascular monitoring and psychosocial interventions.
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Li et al. (2026) studied this question. At 10 years post-diagnosis, 48.6% of breast cancer survivor deaths were from non-cancer causes; Black patients aged 0-54 had 1.70x mortality risk, Asians 65-74 had 0.67x risk.
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