{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,29]],"date-time":"2025-10-29T03:30:33Z","timestamp":1761708633389},"reference-count":24,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2011,2,14]],"date-time":"2011-02-14T00:00:00Z","timestamp":1297641600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Intl J Eating Disorders"],"published-print":{"date-parts":[[2012,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Objective:<\/jats:title><jats:p>Studies of birth patterns in anorexia nervosa have shown relative increases between March and August, while studies in Bulimia Nervosa (BN) have been negative. Since there are no studies using representative, nonclinical samples, we looked for seasonal birth patterns in women with BN and in those who ever endorsed bingeing or purging.<\/jats:p><\/jats:sec><jats:sec><jats:title>Method:<\/jats:title><jats:p>A national, representative sample of 3,006 adult women completed structured telephone interviews including screenings for bulimia nervosa (BN) and questions about month, date, and year of birth. Season of birth was calculated using traditional definitions. Differences across season of birth between subjects with (<jats:italic>n<\/jats:italic> = 85) and without BN (<jats:italic>n<\/jats:italic> = 2,898), those with (<jats:italic>n<\/jats:italic> = 749) and without bingeing (<jats:italic>n<\/jats:italic> = 2,229), and those with (<jats:italic>n<\/jats:italic> = 267) and without any purging (<jats:italic>n<\/jats:italic> = 2,715) were compared using chi\u2010square analyses.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results:<\/jats:title><jats:p>There were significant differences across season of birth between subjects: (1) with and without BN (<jats:italic>p<\/jats:italic> = 0.033); (2) with and without bingeing (<jats:italic>p<\/jats:italic> = 0.034), and; (3) with and without purging (<jats:italic>p<\/jats:italic> = 0.001). Fall had the highest relative number of births for all categories, while spring had the lowest.<\/jats:p><\/jats:sec><jats:sec><jats:title>Discussion:<\/jats:title><jats:p>In a national representative study of nontreatment seeking subjects significant differences in season of birth were found for subjects with lifetime histories of BN, binge eating and purging. \u00a9 2011 by Wiley Periodicals, Inc. 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