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. 2015 Apr 30;10(4):e0124934.
doi: 10.1371/journal.pone.0124934. eCollection 2015.

Impact of income inequality and other social determinants on suicide rate in Brazil

Daiane Borges Machado  1 , Davide Rasella  2 , Darci Neves Dos Santos  1
Affiliations

Impact of income inequality and other social determinants on suicide rate in Brazil

Daiane Borges Machado et al. PLoS One. .

Abstract

Purpose: To analyze whether income inequality and other social determinants are associated with suicide rate in Brazil.

Method: This study used panel data from all 5,507 Brazilian municipalities from 2000 to 2011. Suicide rates were calculated by sex and standardized by age for each municipality and year. The independent variables of the regression model included the Gini Index, per capita income, percentage of individuals with up to eight years of education, urbanization, average number of residents per household, percentage of divorced people, of Catholics, Pentecostals, and Evangelicals. A multivariable negative binomial regression for panel data with fixed-effects specification was performed.

Results: The Gini index was positively associated with suicide rates; the rate ratio (RR) was 1.055 (95% CI: 1.011-1.101). Of the other social determinants, income had a significant negative association with suicide rates (RR: 0.968, 95% CI: 0.948-0.988), whereas a low-level education had a positive association (RR: 1.015, 95% CI: 1.010-1.021).

Conclusions: Income inequality represents a community-level risk factor for suicide rates in Brazil. The decrease in income inequality, increase in income per capita, and decrease in the percentage of individuals who did not complete basic studies may have counteracted the increase in suicides in the last decade. Other changes, such as the decrease in the mean residents per household, may have contributed to their increase. Therefore, the implementation of social policies that may improve the population's socioeconomic conditions and reduce income inequality in Brazil, and in other low and middle-income countries, can help to reduce suicide rates.

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Conflict of interest statement

Competing Interests: The authors have declared that no competing interests exist.

Figures

Fig 1
Fig 1. Gini Index and Suicide Rate comparison in Brazil from 2000 to 2011.
See this image and copyright information in PMC

References

    1. WHO, Suicide Prevention and special programs. Available: http://www.who.int/mental_health/prevention/suicide/suicideprevent/en/. Accessed 10 November 2013.
    1. Nock MK, Borges G, Bromet EJ, Cha CB, Kessler RC, Lee S. Suicide and suicide behavior. Epidemiol Rev 2008; 30:133–154 10.1093/epirev/mxn002 - DOI - PMC - PubMed
    1. de Mello-Santos C, Bertolote JM, Wang Y-P. Epidemiology of suicide in Brazil (1980–2000): characterization of age and gender rates of suicide. Rev Bras Psiquiatr 2005; 27:131–134 - PubMed
    1. Reichenheim ME, de Souza ER, Moraes CL, de Mello-Jorge MHP, da Silva CMFP, de Souza Minayo MC. Violence and injuries in Brazil: the effect, progress made, and challenges ahead. Lancet 2011; 377:1962–1975 10.1016/S0140-6736(11)60053-6 - DOI - PubMed
    1. Prevenção do suicídio: manual dirigido a profissionais das equipes de saúde mental, Ministério da Saúde, 2005. Available: http://bvsms.saude.gov.br/bvs/publicacoes/manual_editoracao.pdf. Accessed 3 June 2013.