In a study published online by JAMA Cardiology, Asher Rosinger, Ph.D., M.P.H., of the Centers for Disease Control and Prevention, Hyattsville, Md., and colleagues examined whether earlier trends of a decline (between 1999 and 2010) in average levels of total cholesterol (TC), triglycerides, and low density lipoprotein cholesterol (LDL-C) continued.
Eight 2-year National Health and Nutrition Examination Survey cross-sectional cycles between 1999/2000 and 2013/2014 were analyzed for trends among adults 20 years or older. This study included 39,049 adults who had TC levels analyzed, and 17,486 and 17,096 who had triglyceride levels and LDL-C levels analyzed, respectively.
Age-adjusted average TC decreased between 1999/2000 (204 mg/dL) and 2013/2014 (189 mg/dL), with a 6-mg/dL drop between 2011/2012 and 2013/2014. Age-adjusted geometric average triglyceride levels decreased from 123 mg/dL in 1999/2000 to 97 mg/dL in 2013/2014, with a 13-mg/dL drop since 2011/2012. Average LDL-C levels decreased from 126 mg/dL to 111 mg/dL during the 8 survey cycles, with a 4-mg/dL drop between 2011/2012 and 2013/2014. Between 1999/2000 and 2013/2014, these decreasing trends were similar when stratified by lipid-lowering medications.
"Removal of trans-fatty acids in foods has been suggested as an explanation for the observed trends of triglycerides, LDL-C levels, and TC levels. With increased interest in triglycerides for cardiovascular health, the continued drop of triglycerides, LDL-C levels, and TC levels at a population level represents an important finding and may be contributing to declining death rates owing to coronary heart disease since 1999," the authors write.
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(JAMA Cardiology. Published online November 30, 2016; doi:10.1001/jamacardio.2016. 4396. Available pre-embargo to the media at http://media.jamanetwork.com.)
Editor's Note: All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none were reported.
Journal
JAMA Cardiology