Chronic diseases are defined broadly as conditions that last 1 year or more and require ongoing medical attention or limit activities of daily living or both. Chronic diseases such as heart disease, cancer, and diabetes are the leading causes of death and disability in the United States. It is very important to give attention to the short list of risk behaviors that are caused by chronic diseases below in order to prevent further complications.
Tobacco use and exposure to secondhand smoke.
Poor nutrition, including diets low in fruits and vegetables and high in sodium and saturated fats.