Tags

Type your tag names separated by a space and hit enter

Seasonal variation in suicide occurrence in Finland.
Acta Psychiatr Scand. 1998 Aug; 98(2):92-7.AP

Abstract

The aim of this study was to investigate the age-, gender- and suicide method-related seasonality of suicide occurrence by using the largest database examined so far (n=21,279). The Chi-square test for multinomials was used as the overall measure of deviation. The monthly observed and expected numbers of suicides were calculated and classified by year, month, gender, age groups and suicide methods. To identify the statistically significant peak and trough months, the ratio of observed numbers of suicides to expected numbers with 95% confidence intervals was calculated. For males, there was a suicide peak from April to July, while for females the distribution was bimodal (with peaks in May and October). In elderly people there was a significant excess in the number of suicides in autumn, and the troughs were deeper in winter. For violent suicides there was a unimodal spring peak, but for non-violent suicides the distribution was bimodal. The results indicate that suicides among elderly subjects, as well as non-violent suicides, occur significantly more often during autumn than would be expected.

Authors+Show Affiliations

Department of Psychiatry, University of Oulu, Finland.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Meta-Analysis

Language

eng

PubMed ID

9718233

Citation

Hakko, H, et al. "Seasonal Variation in Suicide Occurrence in Finland." Acta Psychiatrica Scandinavica, vol. 98, no. 2, 1998, pp. 92-7.
Hakko H, Räsänen P, Tiihonen J. Seasonal variation in suicide occurrence in Finland. Acta Psychiatr Scand. 1998;98(2):92-7.
Hakko, H., Räsänen, P., & Tiihonen, J. (1998). Seasonal variation in suicide occurrence in Finland. Acta Psychiatrica Scandinavica, 98(2), 92-7.
Hakko H, Räsänen P, Tiihonen J. Seasonal Variation in Suicide Occurrence in Finland. Acta Psychiatr Scand. 1998;98(2):92-7. PubMed PMID: 9718233.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Seasonal variation in suicide occurrence in Finland. AU - Hakko,H, AU - Räsänen,P, AU - Tiihonen,J, PY - 1998/8/26/pubmed PY - 1998/8/26/medline PY - 1998/8/26/entrez SP - 92 EP - 7 JF - Acta psychiatrica Scandinavica JO - Acta Psychiatr Scand VL - 98 IS - 2 N2 - The aim of this study was to investigate the age-, gender- and suicide method-related seasonality of suicide occurrence by using the largest database examined so far (n=21,279). The Chi-square test for multinomials was used as the overall measure of deviation. The monthly observed and expected numbers of suicides were calculated and classified by year, month, gender, age groups and suicide methods. To identify the statistically significant peak and trough months, the ratio of observed numbers of suicides to expected numbers with 95% confidence intervals was calculated. For males, there was a suicide peak from April to July, while for females the distribution was bimodal (with peaks in May and October). In elderly people there was a significant excess in the number of suicides in autumn, and the troughs were deeper in winter. For violent suicides there was a unimodal spring peak, but for non-violent suicides the distribution was bimodal. The results indicate that suicides among elderly subjects, as well as non-violent suicides, occur significantly more often during autumn than would be expected. SN - 0001-690X UR - https://www.unboundmedicine.com/medline/citation/9718233/Seasonal_variation_in_suicide_occurrence_in_Finland_ L2 - https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=0001-690X&date=1998&volume=98&issue=2&spage=92 DB - PRIME DP - Unbound Medicine ER -