| Summary: | Background: One of the major risk factors for cardiovascular diseases is hyperlipidemia. The primary aim of this study was to estimate the proportion of individuals between 40–75 years old that would be eligible for statin therapy based on ACC/AHA guideline as compared to ATP-III guideline in a population of patients in Saudi Arabia. We also intended to extrapolate the results to the entire Saudi population, and estimate the cost implications of the ACC/AHA treatment guideline. Methods: This study was a retrospective, observational study involving adult patients aged between 40-75 years old. The study was conducted at the primary health care clinics at King Abdul-Aziz Medical/Riyadh. The eligibility for statins use was assessed and compared for each patient based on both the recent 2013 ACC-AHA guideline and the 2002 ATP-III guideline. The cost implication of applying the ACC/AHA treatment guideline was estimated based on the average cost for 40 mg Atorvastatin in the Saudi Market. Results: A total of 1005 patients were included in the study. Using the ATP-III guideline, there were 139 male (43.7%) and 279 female (40.6%) eligible to receive statin therapy. Based on the 2013 ACC/AHA guideline, treatment is recommended in 315 males (99.1%) and 564 females (82.1%). On the other hand, high-intensity statin was recommended in 302 male (95%) and 400 female (58.2%). Only 74 (10.5%) patients were prescribed high-intensity statin of the 702 eligible patients. Extrapolating the results to the entire Saudi population, 2.369 million additional patients would be eligible for statin therapy when applying the ACC/AHA guideline. Applying the new guideline would result in a cost increase of at least 4.318 billion SR per year. Conclusions: The eligibility for statin therapy was much higher when applying the ACC/AHA guideline as compared to ATP-III guideline. Applying the recent ACC/AHA dyslipidemia guideline increased the number of patients eligible for statin therapy to approximately two folds. This would be associated with a substantial increase in cost and possibly side effects. The concerns surrounding the ACC/AHA guideline should be addressed at the national level. Keywords: Hyperlipidemia, Dyslipidemia, ATP-III guideline, ACC/AHA guideline, Comparison, Cardiovascular risk
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