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Seasonal Changes of Disturbed Eating Behavior in Eating Disorders Masaki YAMATSUJI 1,2,3 , Ichiro ARII 4 , Tatsuhisa YAMASITA 3 , Yuko TOKAJI 3 , Yasuhide NAGOSI 3 , Naoki TATARA 5 , Junko OHASHI 3 , Chikao SAWADA 3 , Hideto TSUCHIDA 3 , Yoshihiro MARUTA 6 , Genichiro KAGAWA 3 , Nanako SUMIKAKE 3 , Hyungin CHOI 3 , Jin NARUMOTO 3 , Hiromi NISHIO 3 , Michihiko NAKAMURA 3 , Kenji FUKUI 3 1Kyoto Second Red Cross Hospital 2Momijigaoka Hospital 3Departnlent of Psychiatry, Kyoto Prefectural University of Medicine 4Saiseikai Suita Hospital 5Miyazaki Shinkeika Saga Hospital 6Arima Hospital Keyword: Eating disorder , Seasonality , Circannual rhythm , Photoperiod pp.923-929
Published Date 1997/9/15
DOI https://doi.org/10.11477/mf.1405904393
  • Abstract
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 Elucidation of the seasonal patterns of eating disorders may be useful in preventing eating disorders and predicting the patient's response to medication or light therapy. We examined the month of onset of disturbed eating behavior, that is, anorexia, binge-eating or vomiting in 221 outpatients with eating disorders. For statistical analysis, we used Pearson's correlation coefficient between the photoperiod and the number of patients with onset of disturbed eating behavior in a given month. The number of patients with onset of anorexia increased from spring to summer, with a peak in April, and decreased in winter. The number of patients with onset of binge-eating increased in winter, with a peak in January, and decreased in summer, with the minimum in June. There were two peaks of onset of vomiting, in February and April. The onset of vomiting was linked, despite a time lag, with the onset of binge-eating. The seasonality of anorexia was more prominent in anorexia nervosa (binge-eating/purging type) and bulimia nervosa than in anorexia nervosa (restricting type). The seasonality of binge-eating was most prominent in bulimia nervosa, especially in patients who had a history of anorexia nervosa. Thus, there was a difference in the seasonality according to the subtype of eating disorder. These findings suggest that onset of disturbed eating behavior in eating disorders is related to photoperiod and there would be a seasonal pattern in eating disorders in Japan.


Copyright © 1997, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-126X 印刷版ISSN 0488-1281 医学書院

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