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Gout and the risk of acute myocardial infarction
Eswar Krishnan1, Joshua F Baker, Daniel E Furst
1University of Pittsburgh, Pittsburgh, Pennsylvania 15261, USA. Arthritis.MD@gmail.com
Insights
Hyperuricemia and gouty arthritis are confirmed independent risk factors for acute myocardial infarction (MI). This increased risk is not explained by kidney function, metabolic syndrome, or other common cardiovascular risk factors.
Area of Science:
- Cardiology
- Rheumatology
- Epidemiology
Background:
- Hyperuricemia and gouty arthritis are associated with cardiovascular disease.
- Their independent risk for acute myocardial infarction (MI) requires clarification, especially concerning confounding factors.
Purpose of the Study:
- To determine if hyperuricemia and gouty arthritis are independent risk factors for acute MI.
- To assess if this risk is independent of renal function, diuretic use, metabolic syndrome, and other established risk factors.
Main Methods:
- Utilized multivariable logistic and instrumental variable probit regressions.
- Analyzed data from the Multiple Risk Factor Intervention Trial (MRFIT) involving 12,866 men followed for a mean of 6.5 years.
Main Results:
- Hyperuricemia was an independent risk factor for acute MI (OR 1.11, P < 0.001).
- Gout was associated with a higher risk of acute MI (OR 1.26, P < 0.001), independent of covariates.
- This association persisted across various subgroups, including those without metabolic syndrome, diabetes, or obesity.
Conclusions:
- The independent risk of hyperuricemia for acute MI is confirmed.
- Gouty arthritis is linked to an excess risk of acute MI, independent of known associated conditions and traditional cardiovascular risk factors.
Objective:
To determine if hyperuricemia and gouty arthritis are independent risk factors for acute myocardial infarction (MI) and, if so, whether they are independent of renal function, diuretic use, metabolic syndrome, and other established risk factors.
Methods:
We performed multivariable logistic and instrumental variable probit regressions on data from the Multiple Risk Factor Intervention Trial (MRFIT).
Results:
Overall, there were 12,866 men in the MRFIT who were followed up for a mean of 6.5 years. There were 118 events of acute MI in the group with gout (10.5%) and 990 events in the group without gout (8.43%; P = 0.018). Hyperuricemia was an independent risk factor for acute MI in the multivariable regression models, with an odds ratio (OR) of 1.11 (95% confidence interval [95% CI] 1.08-1.15, P < 0.001). In multivariable regressions in which the above risk factors were used as covariates, gout was found to be associated with a higher risk of acute MI (OR 1.26 [95% CI 1.14-1.40], P < 0.001). Subgroup analyses showed that a relationship between gout and the risk of acute MI was present among nonusers of alcohol, diuretics, or aspirin and among those who did not have metabolic syndrome, diabetes mellitus, or obesity. In separate analyses, a relationship between gout and the risk of acute MI was evident among those with and without those hyperuricemia.
Conclusion:
The independent risk relationship between hyperuricemia and acute MI is confirmed. Gouty arthritis is associated with an excess risk of acute MI, and this is not explained by its well-known links with renal function, metabolic syndrome, diuretic use, and traditional cardiovascular risk factors.
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