Cited by 251Bipolar Disorder and TreatmentMental Health Research TopicsPersonality Disorders and Psychopathology

Seasonality and bipolar disorder: A systematic review, from admission rates to seasonality of symptoms

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Geoffroy, Pierre Alexis, Bellivier, Frank, Scott, Jan, Etain, Bruno·2014·Journal of Affective Disorders

Abstract

Introduction Bipolar disorder (BD) is a severe mental disorder affecting 1-4% of the population worldwide. It is characterized by periods of (hypo)manic and depressive episodes. Seasonal patterns (SP) may be observed in admission rates, mood relapses and symptom fluctuations. Methods We conducted a systematic review of seasonality in BD, classifying studies based on seasonal admission rates to seasonality of symptoms assessments. Results Fifty-one papers were identified of which 32 addressed hospitalization rates by season, 6 addressed categorical diagnoses, and 13 explored symptom dimensions. Seasonal peaks for different BD mood episodes are observed worldwide and widely replicated. Manic episodes peak during spring/summer and, to a lesser extent, in autumn, depressive episodes peak in early winter and, to a lesser extent, summer, and mixed episodes peak in early spring or mid/late summer. There was a high frequency of SP for manic episodes (15%) and depressive episodes (25%), the latter being associated with a more complex clinical profile (BD II subtype, comorbid eating disorders, more relapses and rapid cycling). Finally, there was evidence for greater seasonal fluctuations in mood and behavior in individuals with BD than in those with unipolar depression or 'healthy' controls. Limitations Sample size, gender distribution, methodological quality and sophistication of the analytical approaches employed varied considerably. Conclusions There is evidence of seasonality in BD, with emerging evidence that climatic conditions may trigger BD symptoms or episodes. A better understanding of the underlying mechanisms would facilitate the development of personalized chronobiological therapeutic and preventive strategies.

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Crossref · 10.1016/j.jad.2014.07.002

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Authors
Geoffroy, P. A., Bellivier, F., Scott, J., & Etain, B.
Affiliations
  • Inserm (FR)
  • Newcastle University (GB)
Corresponding author
Geoffroy, Pierre Alexis
Venue
Journal of Affective Disorders
Publisher
Elsevier BV
Published
2014-10
Volume
168
Pages
210-223
ISSN
0165-0327 (ISSN-L)
OpenAlex
W2163046703
Cited by
251
References
4
Citations by year
2026: 24 · 2025: 24 · 2024: 25 · 2023: 23 · 2022: 31 · 2021: 22 · 2020: 22 · 2019: 15 · 2018: 12 · 2017: 22 · 2016: 16 · 2015: 13 · 2014: 1
FWCI
2.40
Type
journal article
Language
en
Open access
Locations
  • Journal of Affective Disorders (publishedVersion)
  • PubMed (publishedVersion)
  • Newcastle University ePrints (Newcastle Univesity)
Funders
Sanofi
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Bipolar Disorder and Treatment
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Mental Health Research Topics
  • Social Sciences › Psychology › Clinical Psychology › Personality Disorders and Psychopathology
Keywords
bipolar disorder, seasonal variation, seasonal patterns, manic episodes, depressive episodes, mixed states, hospitalization rates, rapid cycling, eating disorder comorbidity, chronobiology
MeSH terms
Affect, Bipolar Disorder, Depressive Disorder, Major, Major Depressive Disorder, Female, Hospitalization, Humans, Patient Admission, Recurrence, Seasons

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