Seasonality of suicide attempts: Association with gender

Roland Mergl, Inga Havers, David Althaus, Zoltán Rihmer, Armin Schmidtke, Hartmut Lehfeld, Gunter Niklewski, Ulrich Hegerl

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Some studies suggest seasonality of suicide attempts in females, but not in males. The reasons for this gender difference remain unclear. Only few studies addressed the question whether gender differences in seasonality of suicide attempts reflect gender differences in the choice of method for suicide attempts, with inconsistent results. So, this study aimed to analyze the association of gender with seasonality in suicide attempts by persons living in two Northern Bavarian regions [city of Nuremberg (48O,OOO inhabitants) and region of Wuerzburg (27O,OOO inhabitants)] between 2OOO and 2OO4. We addressed this question by focussing on the frequency of suicide attempts in relation to the seasons. The sample consisted of 2,269 suicide attempters (882 males and 1,387 females). The overall seasonality was assessed using the x2 test for multinomials. Moreover, the ratio of observed to expected number of suicide attempts (OER) with 95% confidence intervals within each season was calculated. As a result, overall distribution of suicide attempts differed significantly between seasons for women (x2 = 9.19, df = 3, P = 0.03), but not for men. Female suicide attempts showed a trough in the spring (decline compared to the expected value by 1O%; OER = 0.9, 95% CI = 0.8-1.0). This trough was restricted to female low-risk suicide attempts (decline by 13%; OER = O.87, 95% CI = O.77-O.98). No seasonality was found for men. Seasonality of high-risk methods was more pronounced than that of low-risk methods; however, no significant gender differences were found concerning this aspect. The overall distribution of the sub-types of suicidal acts (parasuicidal gestures, suicidal pauses, suicide attempts in the strict sense) showed seasonality neither for males nor for females. Whereas seasonality was absent in male suicide attempters, the frequency of low-risk suicide attempts in females was 13.1% lower than expected in the spring.

Original languageEnglish
Pages (from-to)393-400
Number of pages8
JournalEuropean archives of psychiatry and clinical neuroscience
Volume260
Issue number5
DOIs
Publication statusPublished - Aug 1 2010

Keywords

  • Gender
  • High-risk method
  • Low-risk method
  • Seasonality
  • Suicide attempts

ASJC Scopus subject areas

  • Psychiatry and Mental health
  • Biological Psychiatry
  • Pharmacology (medical)

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  • Cite this

    Mergl, R., Havers, I., Althaus, D., Rihmer, Z., Schmidtke, A., Lehfeld, H., Niklewski, G., & Hegerl, U. (2010). Seasonality of suicide attempts: Association with gender. European archives of psychiatry and clinical neuroscience, 260(5), 393-400. https://doi.org/10.1007/s00406-009-0086-1