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[Affective disorders and solar activity].

F Ivanovic-Zuvic1, R de la Vega, N Ivanovic-Zuvic

  • 1Clínica Psiquiátrica Universitaria, Facultad de Medicina Norte, Universidad de Chile, Chile. ferlore@netline.cl

Actas Espanolas De Psiquiatria
|February 11, 2005
PubMed
Summary

This study found that depressive disorders negatively correlate with solar activity, while manic disorders show a positive correlation. Lower solar activity is linked to more depression hospitalizations.

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Area of Science:

  • Psychiatry
  • Heliophysics
  • Environmental Medicine

Context:

  • Affective disorders, including depression and mania, represent a significant public health concern.
  • Solar activity, measured by the Wolf number, exhibits an approximately 11-year cycle.
  • Previous research has explored environmental influences on mental health, but the specific link to solar cycles requires further investigation.

Purpose:

  • To investigate the correlation between solar activity (Wolf numbers) and the incidence of first-time hospitalizations for major depressive and manic disorders.
  • To analyze data over a complete 11-year solar cycle (1990-2000).

Summary:

  • A study of 1,212 clinical files from Santiago, Chile, examined the relationship between annual hospitalization rates for depression and mania and average Wolf numbers.

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  • Results indicated a significant negative correlation (Pearson coefficient = -0.72) between depressive disorders and solar activity.
  • Manic disorders showed a positive correlation (Pearson coefficient = +0.334) with solar activity, with a slight increase during periods of high solar activity.

    • Impact:

    • Findings suggest that solar activity may be a relevant environmental factor influencing the occurrence of affective disorders.
    • Highlights a potential epidemiological link between geomagnetic activity and mood disorders.
    • Provides a basis for further research into the mechanisms underlying the relationship between solar cycles and mental health outcomes.