Serum uric acid and risk for cardiovascular disease and death: the Framingham Heart Study

Area of Science:

• Cardiovascular epidemiology
• Metabolic health research

Background:

• Hyperuricemia is linked to cardiovascular disease (CVD) and mortality.
• The independent role of uric acid in CVD risk is not fully understood.

Purpose of the Study:

• To investigate the association between serum uric acid levels and incident coronary heart disease (CHD).
• To examine the relationship between serum uric acid and cardiovascular disease (CVD) mortality.
• To assess the link between serum uric acid and all-cause mortality.

Main Methods:

• A community-based, prospective observational study of 6763 participants from the Framingham Heart Study.
• Serum uric acid levels were measured at baseline (1971-1976).
• Event rates were analyzed by sex-specific uric acid quintiles over 117,376 person-years of follow-up.

Main Results:

• In men, elevated uric acid was not associated with adverse outcomes after age adjustment.
• In women, uric acid predicted incident CHD, CVD death, and all-cause mortality (P < 0.05).
• These associations in women disappeared after adjusting for CVD risk factors; diuretic use was identified as a key confounder.

Conclusions:

• Serum uric acid does not appear to have a causal role in the development of CHD, CVD death, or all-cause mortality.
• The observed association between uric acid and adverse outcomes is likely explained by its correlation with other risk factors.
• Diuretic use may confound the relationship between uric acid and cardiovascular outcomes.