The SP seldom occurs in its ‘‘pure’’ form and it has been estimated in most of epidemiological studies that a large part of patients with SP (from 70–80% to 92% in various general population samples) have at least one other psychiatric disorder during their life. The commonest comorbid disorders with SP, considering lifetime diagnosis, are panic disorder with agoraphobia (PDA), generalised anxiety disorder (GAD), major depressive episode (MDE), obsessive-compulsive disorder (OCD), AGO, simple phobia, eating disorders, alcohol and substance abuse/dependence.