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BACKGROUND: The ACC/AHA released a new guideline on the assessment of cardiovascular risk and management of hypercholesterolemia that some controversy exists concerning its usefulness. We examined the clinical usefulness of this guideline in a high incidence population using novel measures. METHODS: First, we validated the new risk equation in a cohort of 2372 men and 2781 women aged 40-75 years. Then, high risk individuals for cardiovascular diseases (CVDs) were identified according to the ACC/AHA guideline at baseline (as a predictor) and CVD outcomes were detected during a 10-year follow-up. Discrimination of the guideline was quantified and the quality of decisions was evaluated by Net Benefit Fraction index considering the harm, for false-positive, and benefit, for true-positive predictions. Finally, net number needed to treat (NNT) for statin was estimated, using test tradeoff index, in diabetic and non-diabetic subjects. RESULTS: During follow-up, 726 CVD events including 298 hard CVDs occurred. The equation overestimated the risk by 57% in men and 48% in women. Based on the guideline, 73% of men and 44% of women were eligible for statin therapy. The lowest sensitivity was detected for intensive treatment in non-diabetic subgroups (82% in men and 41% in women; corresponding specificity, 52% and 90% respectively). The guideline had a significant net benefit for both moderate and intensive treatment, which resulted in estimated NNTs ranged 5-55; however, net benefit of intensive therapy was uncertain in non-diabetic women. CONCLUSIONS: We objectively showed that the ACC/AHA recommendations could be useful in our population but with some overtreatment in women.

Original publication

DOI

10.1016/j.ijcard.2015.03.067

Type

Journal article

Journal

Int J Cardiol

Publication Date

01/04/2015

Volume

184

Pages

587 - 594

Keywords

Cardiovascular diseases, Net benefit, Number needed to treat, Prevention, Statins, Adult, Aged, American Heart Association, Cardiology, Cardiovascular Diseases, Cohort Studies, Female, Follow-Up Studies, Humans, Hydroxymethylglutaryl-CoA Reductase Inhibitors, Male, Middle Aged, Population Surveillance, Practice Guidelines as Topic, Prospective Studies, Reproducibility of Results, Risk Factors, United States