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|Suicide cases in developed and emerging countries: an analysis using wavelets
|Casos de suicídio em países desenvolvidos e emergentes: uma análise usando ondaletas
|World Health Organization
Organização Mundial da Saúde
Transformada de ondaletas
Casos de suicídio
|Instituto de Psiquiatria da Universidade Federal do Rio de Janeiro
|FERREIRA, L. M. et al. Suicide cases in developed and emerging countries: an analysis using wavelets. Jornal Brasileiro de Psiquiatria, Rio de Janeiro, v. 70, n. 3, p. 193-202, Jul./Sept. 2021. DOI: 10.1590/0047-2085000000341 .
|Objective: The aim of this study was to use a wavelet technique to determine whether the number of suicides is similar between developed and emerging countries. Methods: Annual data were obtained from World Health Organization (WHO) reports from 1986 to 2015. Discrete nondecimated wavelet transform was used for the analysis, and the Daubechies wavelet function was applied with five-level decomposition. Regarding clustering, energy (variance) was used to analyze the clusters and visualize the clustering process. We constructed a dendrogram using the Mahalanobis distance. The number of groups was set using a specific function in the R program. Results: The cluster analysis verified the formation of four groups as follows: Japan, the United States and Brazil were distinct and isolated groups, and other countries (Austria, Belgium, Chile, Israel, Mexico, Italy and the Netherlands) constituted a single group. Conclusion: The methods utilized in this paper enabled a detailed verification of countries with similar behaviors despite very distinct socioeconomic, geographic and climate characteristics.
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|DES - Artigos publicados em periódicos
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