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Many previous studies do not evaluate types of eating disorder.<\/jats:p><\/jats:sec><jats:sec id=\"S0007125021001045_sec_a2\"><jats:title>Aims<\/jats:title><jats:p>To provide relative and absolute risks of bidirectional associations between (a) anorexia nervosa, bulimia nervosa and eating disorders not otherwise specified and (b) 12 general medical conditions.<\/jats:p><\/jats:sec><jats:sec id=\"S0007125021001045_sec_a3\" sec-type=\"methods\"><jats:title>Method<\/jats:title><jats:p>We included all people born in Denmark between 1977 and 2010. We collected information on eating disorders and considered the risk of subsequent medical conditions, using Cox proportional hazards regression. Absolute risks were calculated using competing risks survival analyses. We also considered risks for prior medical conditions and subsequent eating disorders.<\/jats:p><\/jats:sec><jats:sec id=\"S0007125021001045_sec_a4\" sec-type=\"results\"><jats:title>Results<\/jats:title><jats:p>An increased risk was seen for almost all disorder pairs (69 of 70). Hazard ratios for those with a prior eating disorder receiving a subsequent diagnosis of a medical condition ranged from 0.94 (95% CI 0.57\u22121.55) to 2.05 (95% CI 1.86\u22122.27). For those with a prior medical condition, hazard ratios for later eating disorders ranged from 1.35 (95% CI 1.26\u20131.45) to 1.98 (95% CI 1.71\u20132.28). Absolute risks for most later disorders were increased for persons with prior disorders, compared with reference groups.<\/jats:p><\/jats:sec><jats:sec id=\"S0007125021001045_sec_a5\" sec-type=\"conclusions\"><jats:title>Conclusions<\/jats:title><jats:p>This is the largest and most detailed examination of eating disorder\u2013medical condition comorbidity. The findings indicate that medical condition comorbidity is increased among those with eating disorders and<jats:italic>vice versa<\/jats:italic>. Although there was some variation in comorbidity observed across eating disorder types, magnitudes of relative risks did not differ greatly.<\/jats:p><\/jats:sec>","DOI":"10.1192\/bjp.2021.104","type":"journal-article","created":{"date-parts":[[2021,8,25]],"date-time":"2021-08-25T12:33:07Z","timestamp":1629894787000},"page":"279-286","update-policy":"https:\/\/doi.org\/10.1017\/policypage","source":"Crossref","is-referenced-by-count":20,"title":["Comorbidity between types of eating disorder and general medical conditions"],"prefix":"10.1192","volume":"220","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9832-8500","authenticated-orcid":false,"given":"Natalie C.","family":"Momen","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Oleguer","family":"Plana-Ripoll","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cynthia 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