Comorbidity among anxiety disorders happens fr 2 reasons - Symptoms of the anxiety disorder are not completely disorder specific. Etiological factors that give rise to anxiety disorders are applicable to other disorders. Higher prevalance in wmen (16%) than men (9%) and women agd 15 - 24 years old. Social anxiety disorder was the most common ---> majority of canadians believed it interrupted there everyday life. People with anxiety disorders were less likely to seak help than people with mood disorders. Show similarities at the phenotypic and genotypic level. Studies found that social phobia was a major predictor of depression. Phobia = disrupting, fear mediated, avoidance that is out of proportion to danger that is actually posed. Specific phobias - unwarranted fears caused by the presence or anticilation of a specific object or situation. High in prevalence ----> life time prvlence in us almost 1 in 10. Specific fear focused in a phobia can vary cross culturally.