OBJECTIVE: To evaluate suicide seasonality in the city of São Paulo within an urban area and tropical zone. METHOD: Suicides were evaluated using the chi-square test and analysis of variance (ANOVA) by comparing monthly, quarterly and half-yearly variations, differentiating by gender. Analyses of time series were carried out using the autocorrelation function and periodogram, while the significance level for seasonality was confirmed with the Fisher's test. RESULTS: The suicides of the period between 1979 and 2003 numbered 11,434 cases. Differences were observed in suicides occurring in Spring and Autumn for the total sample (ANOVA: p-value = 0.01), and in the male sample (ANOVA: p-value = 0.02). For the analysis of time series, seasonality was significant only for the period of 7 months in the male sample (p-value = 0.04). DISCUSSION: In this study, no significant seasonal differences were observed in the occurrences of suicides, with the exception of the male sample. The differences observed did not correspond with the pattern described in studies carried out in temperate zones. Some of the climatic particularities of the tropical zone might explain the atypical pattern of seasonality of suicides found in large populations within an urban area and tropical zone.
OBJECTIVE: To evaluate suicide seasonality in the city of São Paulo within an urban area and tropical zone. METHOD: Suicides were evaluated using the chi-square test and analysis of variance (ANOVA) by comparing monthly, quarterly and half-yearly variations, differentiating by gender. Analyses of time series were carried out using the autocorrelation function and periodogram, while the significance level for seasonality was confirmed with the Fisher's test. RESULTS: The suicides of the period between 1979 and 2003 numbered 11,434 cases. Differences were observed in suicides occurring in Spring and Autumn for the total sample (ANOVA: p-value = 0.01), and in the male sample (ANOVA: p-value = 0.02). For the analysis of time series, seasonality was significant only for the period of 7 months in the male sample (p-value = 0.04). DISCUSSION: In this study, no significant seasonal differences were observed in the occurrences of suicides, with the exception of the male sample. The differences observed did not correspond with the pattern described in studies carried out in temperate zones. Some of the climatic particularities of the tropical zone might explain the atypical pattern of seasonality of suicides found in large populations within an urban area and tropical zone.
Authors: J Yu; D Yang; Y Kim; M Hashizume; A Gasparrini; B Armstrong; Y Honda; A Tobias; F Sera; A M Vicedo-Cabrera; H Kim; C Íñiguez; E Lavigne; M S Ragettli; N Scovronick; F Acquaotta; B Chen; Y L Guo; M de Sousa Zanotti Stagliori Coelho; P Saldiva; A Zanobetti; J Schwartz; M L Bell; M Diaz; C De la Cruz Valencia; I Holobâcă; S Fratianni; Y Chung Journal: Epidemiol Psychiatr Sci Date: 2020-08-24 Impact factor: 6.892
Authors: Konstantinos N Fountoulakis; Isaia Chatzikosta; Konstantinos Pastiadis; Prodromos Zanis; Wolfram Kawohl; Ad J F M Kerkhof; Alvydas Navickas; Cyril Höschl; Dusica Lecic-Tosevski; Eliot Sorel; Elmars Rancans; Eva Palova; Georg Juckel; Goran Isacsson; Helena Korosec Jagodic; Ileana Botezat-Antonescu; Janusz Rybakowski; Jean Michel Azorin; John Cookson; John Waddington; Peter Pregelj; Koen Demyttenaere; Luchezar G Hranov; Lidija Injac Stevovic; Lucas Pezawas; Marc Adida; Maria Luisa Figuera; Miro Jakovljević; Monica Vichi; Giulio Perugi; Ole A Andreassen; Olivera Vukovic; Paraskevi Mavrogiorgou; Peeter Varnik; Peter Dome; Petr Winkler; Raimo K R Salokangas; Tiina From; Vita Danileviciute; Xenia Gonda; Zoltan Rihmer; Jonas Forsman; Anne Grady; Thomas Hyphantis; Ingrid Dieset; Susan Soendergaard; Maurizio Pompili; Per Bech Journal: Ann Gen Psychiatry Date: 2016-08-09 Impact factor: 3.455