Abstract
Introduction: The American Heart Association and American College of Cardiology (AHA/ACC) recently released updated guidelines for management of blood cholesterol, which differ from current European Society of Cardiology and European Atherosclerosis Society (ESC/EAS) guidelines. How these differences affect the overall number of individuals recommended for statin therapy in a country with high cardiovascular disease (CVD) risk remains unclear. Hypothesis: Due to the lower threshold for statin recommendations for primary prevention based on 10-year CVD risk under the AHA/ACC guidelines, more adults overall would be recommended for statin therapy under American compared to European guidelines. Methods: Using 2011 data from a nationwide cross-sectional survey in Poland (NATPOL), we estimated the number and characteristics of adults aged 40-65 recommended for lipid lowering therapy under the ESC/EAS and AHA/ACC guidelines. The survey sample of 1060 adults represented 13.5 million adults in Poland aged 40-65. Results: Under ESC/EAS guidelines, 47.6% of adults (44.6-50.7%) aged 40-65 were recommended for immediate statin therapy, compared to 49.9% (46.9-52.9%) under AHA/ACC guidelines. Among adults free of cardiovascular disease (CVD), 10.5% had discordant recommendations between guidelines. Individuals recommended for statin therapy under ACC/AHA but not ESC/EAS guidelines had less chronic kidney disease, higher HDL cholesterol, higher 10-year (AHA/ACC calculator) risk, and higher 30-year (Framingham) risk than adults recommended under ESC/EAS but not under ACC/AHA guidelines. Ten-year CVD mortality risk estimated by the SCORE algorithm was similar between the two groups. Conclusions: In spite of differences between current European and American cholesterol guidelines, when applied to a nationwide representative sample from a country with high CVD risk, the number of adults aged 40-65 recommended for cholesterol lowering therapy under each guideline was nearly identical. Although more adults met criteria for primary prevention based on 10-year CVD risk under new American guidelines, the impact of this is offset by additional criteria for statin therapy in current European guidelines.
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