@article{ref1,
title="Secular trends in the rates and seasonality of violent and nonviolent suicide occurrences in Finland during 1980-95",
journal="Journal of affective disorders",
year="1998",
author="Hakko, Helina and Rasanen, Pirkko and Tiihonen, Jari",
volume="50",
number="1",
pages="49-54",
abstract="BACKGROUND: Because secular trends in seasonality of different types of suicides has not been studied before, we utilized a novel statistical method to evaluate this phenomenon by using national Finnish suicide statistics during 1980-95. METHODS: Rates were analyzed with ordinary linear regression analysis. Secular trends were evaluated using ratio-statistic and its 95% confidence intervals. RESULTS: The rate of violent suicides increased before year 1990 and decreased since that. The nonviolent suicide rate increased continuously. The decreasing tendency of seasonality in nonviolent suicides and a slight decrease in violent suicides are seen within the three successive time periods studied. CONCLUSIONS: Trends in rates and in seasonality of suicides might be related to changes in the health politics in Finland. LIMITATIONS: The short time-series and lack of studying associations of suicides with socioeconomic, environmental or biological factors are limitations of our study. CLINICAL RELEVANCE: Studying the time-dependent changes in rates and in seasonality of suicides provide a novel perspective for the evaluation of the aetiology of suicidal behaviour.<p /> <p>Language: en</p>",
language="en",
issn="0165-0327",
doi="",
url="http://dx.doi.org/"
}