Optimal Cutoff Points for Body Mass Index to Predict Coronary Artery Disease

Background: Obesity has been known as an independent risk factor of cardiovascular disease. We aimed to determine the optimal body mass index (BMI) for predicting coronary vascular disease. Conventional coronary angiography (CAG) and coronary computed tomography angiography (CCTA) have been used to detect significant coronary artery diseases. Methods: We reviewed the medical records of 1,356 adults who visited a general hospital between January 2012 and December 2013. CAG was performed in 680 symptomatic patients who visited the emergency or outpatient department; and CCTA, in 676 asymptomatic patients who visited the health promotion center. Receiver-operating characteristic (ROC) analysis was used to determine the optimal cutoff BMI to predict coronary vascular abnormalities. Results: The optimal cutoff BMIs in the CAG and CCTA groups were respectively 25.4 kg/m 2 and 22.9 kg/m 2 for males, and 23.5 kg/m 2 and 24.7 kg/m 2 for females. Conclusion: The Regional Office for the Western Pacific (WPRO) criteria were used to categorize adult overweight and obesity. According to the WPRO criteria, overweight is defined by a BMI of 23 to 24.9 kg/m 2 . The present results meet the WPRO criteria for overweight regardless of symptoms.