Headache, depression and anxiety: associations in the Eurolight project

Background Headache disorders and psychiatric disorders are both common, while evidence, mostly pertaining to migraine, suggests they are comorbidmore often than might be expected by chance. There are good reasons for establishing whether they are: symptoms of comorbidillnesses may summate synergistically; comorbiditieshinder management, negatively influencing outcomes; high-level comorbidityindicates that, where one disease occurs, the other should be looked for. The Eurolight project gathered population-based data on these disorders from 6624 participants.