The correlative study of coronary risk factors by coronary computerized tomography angiography (CCTA) in a non-symptomatic and untreated population.

This observational study is looking at how many people who appear healthy actually have early-stage buildup of plaque in their heart arteries, as detected by a special CT scan called a coronary CT angiography (CCTA). Researchers in China want to understand how common risk factors — like blood pressure, cholesterol, and lifestyle — relate to the early signs of heart artery disease in people with no symptoms. You may be eligible if: - You were admitted for a health check-up at the participating hospital between January 2010 and June 2012 - You underwent a coronary CT angiography scan during that admission - You are between 25 and 70 years old You may NOT be eligible if: - You have symptoms of heart disease - You have a known history of heart disease - You have received any ongoing medical treatment for a health condition Talk to your doctor about whether this trial might be right for you.