Results from the 2009 National Survey on Drug Use and Health: Mental Health Findings

According to results from this comprehensive national survey, 11 million adults (4.8 percent) in the U.S. have suffered serious mental illness in 2009, and in many cases these individuals also have a substance use disorder. The survey provides many insights into the nature and scope of mental illness. Because of its statistical power, it is a primary source of information on a wide range of behavioral health matters including mental health and substance abuse issues.