This study is based on 5 other studies on mental health of 18,000 U.S. adults. The authors found people with uncomplicated panic disorder (without any other Axis 1 disorders) represent less than a third of persons with panic disorder. The attempted suicide rate of persons with uncomplicated panic disorder (7%) was consistently higher than for those with no psychiatric disorder (1%). The rate of suicide attempts in those with uncomplicated major depression (7.9%) was similiar to panic disorder.