TY - JOUR T1 - Secular trends in the rates and seasonality of violent and nonviolent suicide occurrences in Finland during 1980-95. 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 - 49 EP - 54 JF - Journal of affective disorders JO - J Affect Disord VL - 50 IS - 1 N2 - 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. SN - 0165-0327 UR - https://www.unboundmedicine.com/medline/citation/9716280/Secular_trends_in_the_rates_and_seasonality_of_violent_and_nonviolent_suicide_occurrences_in_Finland_during_1980_95_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0165-0327(98)00031-7 DB - PRIME DP - Unbound Medicine ER -