Which of the following is not a factor for risk of coronary artery disease?

Low cholesterol levels are not considered a risk factor for coronary artery disease (CAD). In fact, low levels of cholesterol, particularly low levels of low-density lipoprotein (LDL) cholesterol, are generally associated with a lower risk for heart disease. High levels of LDL cholesterol can lead to a buildup of plaque in the arteries, increasing the risk for CAD.

On the other hand, family history of CAD, a sedentary lifestyle, and high blood pressure are well-established risk factors. A family history of CAD suggests a genetic predisposition to heart conditions, while a sedentary lifestyle is linked to higher rates of obesity, high cholesterol, and hypertension, all of which contribute to heart disease. High blood pressure can damage the arteries over time, leading to an increased risk for CAD as well. Thus, low cholesterol levels are not a risk factor and may be beneficial in the context of heart health.