Temporal Trends in Cause-Specific Cardiovascular Disease Mortality Following Cancer Diagnosis

Area of Science:

• Oncology
• Cardiology
• Epidemiology

Background:

• Cancer diagnosis significantly impacts patient mortality, with cardiovascular disease (CVD) being a major concern.
• Understanding the temporal relationship between cancer diagnosis and CVD mortality is crucial for patient management.

Purpose of the Study:

• To analyze temporal trends in cardiovascular disease (CVD) mortality following cancer diagnosis.
• To stratify CVD mortality by disease type, cancer type, and demographic characteristics.
• To identify high-risk periods for CVD mortality after cancer diagnosis.

Main Methods:

• Utilized the National Cancer Registry in Japan for individuals diagnosed between January 2016 and June 2020.
• Calculated Standardized Mortality Ratios (SMRs) comparing observed CVD deaths in cancer patients to expected deaths in the general population.
• Employed multivariable Cox models to assess hazard ratios for various covariates.

Main Results:

• Analysis included over 4.7 million individuals, with 70,630 CVD deaths.
• CVD mortality SMRs peaked within 0-1 month post-diagnosis (e.g., 2.35 for all CVDs) and decreased by 6 months (e.g., 1.18).
• A secondary increase in SMRs was observed around 37-48 months; younger individuals had higher SMRs, and advanced cancer stages correlated with higher mortality risks.

Conclusions:

• Detailed temporal patterns of CVD mortality following cancer diagnosis were elucidated.
• The acute phase post-diagnosis represents a critical period for elevated CVD mortality risk.
• Findings highlight the need for monitoring cardiovascular health in cancer patients, especially during specific timeframes.