RESUMOIntrodução: O suicídio é considerado um problema de saúde pública. É um fenómeno complexo que resulta da interação de múltiplos fatores e que não depende unicamente de condições individuais. Este estudo pretende analisar a evolução espácio-temporal da mortalidade por suicídio em Portugal Continental, entre os anos de 1980 e 2015, identificando, nos 278 municípios, áreas de risco e suas alterações. Material e Métodos: Com base no número de óbitos por suicídio e lesões autoinfligidas e na população residente, a evolução espácio-temporal da taxa de mortalidade por suicídio foi analisada através de: i) um modelo de regressão de Poisson joinpoint, e ii) métodos de clusterização espácio-temporal. Resultados: A evolução da taxa de mortalidade por suicídio revelou três períodos de incremento (1980 -1984, 1999 -2002 e 2006 -2015) e dois períodos de decréscimo (1984 -1995 e 1995 -1999) ABSTRACT Introduction: Suicide is considered a public health priority. It is a complex phenomenon resulting from the interaction of several factors, which do not depend solely on individual conditions. This study analyzes the spatio-temporal evolution of suicide mortality between 1980 and 2015, identifying areas of high risk, and their variation, in the 278 municipalities of Continental Portugal. Material and Methods: Based on the number of self-inflicted injuries and deaths from suicide and the resident population, the spatiotemporal evolution of the suicide mortality rate was assessed via: i) a Poisson joinpoint regression model, and ii) spatio-temporal clustering methods.
Results:The suicide mortality rate evolution showed statistically significant increases over three periods (1980 -1984; 1999 -2002 and 2006 -2015) and two statistically significant periods of decrease (1984 -1995 and 1995 -1999). The spatio-temporal analysis identified five clusters of high suicide risk (relative risk >1) and four clusters of low suicide risk (relative risk < 1). Discussion: The periods when suicide mortality increases seem to overlap with times of economic and financial instability. The geographical pattern of suicide risk has changed: presently, the suicide rates from the municipalities in the Center and North are showing more similarity with those seen in the South, thus increasing the ruralization of the phenomenon of suicide. Conclusion: Between 1980 and 2015 the spacio-temporal pattern of mortality from suicide has been changing and is a phenomenon that is currently experiencing a growing trend (since 2006) and is of higher risk in rural areas.