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Relationship between suicide and holidays.

M Nishi1, H Miyake, H Okamoto

  • 1Department of Public Health, Sapporo Medical University, Hokkaido, Japan.

Journal of Epidemiology
|November 4, 2000
PubMed
Summary
This summary is machine-generated.

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Suicide rates in Hokkaido, Japan, were highest on Mondays and lowest on Saturdays. The study found a link between suicide intention and proximity to holidays, with rates peaking the day after a holiday.

Area of Science:

  • Public Health
  • Epidemiology
  • Psychiatry

Background:

  • Understanding temporal patterns in suicide is crucial for public health interventions.
  • Previous research suggests potential links between suicide and weekly or holiday cycles.

Purpose of the Study:

  • To investigate the relationship between suicide occurrences and days of the week in Hokkaido Prefecture, Japan.
  • To examine suicide rates in relation to holidays and the days surrounding them.

Main Methods:

  • Analysis of vital statistics on suicide (ICD 9 code, El15) from January 1, 1979, to December 31, 1994.
  • Classification of days into holiday-related categories: holiday, day before, day after, both before and after, and others.
  • Examination of trends across age, season, and calendar year subgroups.

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Main Results:

  • Average daily suicides: 1.97 males and 0.98 females.
  • Suicide rates were lowest on Saturdays and highest on Mondays.
  • Suicide rates were lowest on days preceding a holiday and highest on days following a holiday, a pattern consistent across subgroups.

Conclusions:

  • The day of the week and proximity to holidays are significantly associated with suicide rates.
  • The temporal relationship with holidays appears to influence suicidal intention.