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Seasonal mood patterns in eating disorders.

A M Ghadirian1, N Marini, S Jabalpurwala

  • 1Department of Psychiatry, McGill University, Royal Victoria Hospital, Montreal, Quebec, Canada.

General Hospital Psychiatry
|November 26, 1999
PubMed
Summary

Seasonal Affective Disorder (SAD) affects over a quarter of eating disorder patients, particularly those with bulimia nervosa. This suggests a link between SAD and eating disorders, possibly due to shared neurobiological factors.

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Area of Science:

  • Psychiatry
  • Clinical Psychology
  • Neurobiology

Background:

  • Emerging research suggests seasonal patterns in mood and eating behaviors among individuals with bulimia nervosa.
  • Previous studies indicate a worsening of bulimic symptoms during winter months.
  • Seasonal Affective Disorder (SAD) and bulimia nervosa share potential commonalities, including increased appetite, carbohydrate craving, and possible serotonergic dysfunction.

Purpose of the Study:

  • To investigate the prevalence of Seasonal Affective Disorder (SAD) within a clinical sample of outpatients diagnosed with eating disorders.
  • To explore the relationship between SAD and specific eating disorder diagnoses, particularly bulimia nervosa.

Main Methods:

  • A sample of 259 consecutively evaluated outpatients from an eating disorders clinic participated.

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  • Diagnoses were confirmed using DSM-III-R criteria.
  • A modified Seasonal Pattern Assessment Questionnaire was employed to assess seasonality.

    • Main Results:

    • 27.0% of the total eating disorder patient sample met the criteria for SAD.
    • Bulimic patients constituted the largest subgroup diagnosed with SAD (71.4%).
    • Anorexic patients represented 18.6% of the SAD group, with the remainder classified as unspecified.

    Conclusions:

    • A significant portion of eating disorder patients exhibit symptoms consistent with Seasonal Affective Disorder (SAD).
    • Bulimia nervosa appears to be particularly associated with SAD, suggesting a potential shared underlying pathophysiology.
    • Further research into the neurobiological links between SAD and eating disorders is warranted.