The relationship between suicide rates and age: an analysis of multinational data from the World Health Organization.
BACKGROUND
Suicide rates generally increase with age. With the emergence of studies from several countries without an increase in suicides rates with aging, a cross-national study examining the relationship between suicide rates and age was undertaken.


METHODS
The relationship between suicide rates and age was examined by ascertaining suicide rates in both sexes in seven age-bands 16-24 years, 25-34 years, 35-44 years, 45-54 years, 55-64 years, 65-74 years and 75+ years, from the World Health Organization website for all the listed countries (N = 62).


RESULTS
The main findings were: (i) there was a significant increase in suicide rates with increasing age in males and females in 25 and 27 countries respectively; (ii) there was no significant increase in suicide rates with increasing age in males and females in 31 and 29 countries respectively; (iii) suicide rates were the highest in the younger age-bands in countries without a significant increase in male suicides rates with increasing age; (iv) countries without a significant increase in the suicide rate with increasing age in both sexes, females only and males only demonstrated regional clustering; and, (v) in a small number of countries suicide rates declined with increasing age.


CONCLUSIONS
Potential explanations for regional and cross-national variations in the relationship between suicide rates and age require further study.
Shah
Ajit
A
West London Mental Health NHS Trust and Imperial College School of Medicine, London, UK. ajit.shah@wlmht.nhs.uk
D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D015982:Bias; D016000:Cluster Analysis; D003431:Cross-Cultural Comparison; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012737:Sex Factors; D013405:Suicide / Q000523:psychology / Q000706:statistics & numerical data*; D014944:World Health Organization