Korean J Fam Med 2017; 38(3): 135-140  https://doi.org/10.4082/kjfm.2017.38.3.135
Decomposing Socioeconomic Inequality Determinants in Suicide Deaths in Iran: A Concentration Index Approach
Yousef Veisani1, Ali Delpisheh2,*, Kourosh Sayehmiri3, Ghobad Moradi4, Jafar Hassanzadeh5
1Psychosocial Injuries Research Center, Ilam University of Medical Sciences, Ilam, Iran
2Department of Clinical Epidemiology, Ilam University of Medical Sciences, Ilam, Iran
3Biostatistics, Social Medicine Department, Ilam University of Medical Sciences, Ilam, Iran
4Social Determinants of Health Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran
5Research Center for Health Sciences, Department of Epidemiology, School of Health, Shiraz University of Medical Sciences, Shiraz, Iran
Ali Delpisheh Tel: +98-843-2240404, Fax: +98-843-2240404, E-mail: alidelpisheh@yahoo.com
Received: September 26, 2016; Accepted: October 14, 2016; Published online: May 20, 2017.
© Korean Academy of Family Medicine. All rights reserved.

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Background: It is recognized that socioeconomic status (SES) has a significant impact on health and wellbeing; however, the effect of SES on suicide is contested. This study explored the effect of SES in suicide deaths and decomposed inequality into its determinants to calculate relative contributions.
Methods: Through a cross-sectional study, 546 suicide deaths and 6,818 suicide attempts from January 1, 2010 to December 31, 2014 in Ilam Province, Western Iran were explored. Inequality was measured by the absolute concentration index (ACI) and decomposed contributions were identified. All analyses were performed using STATA ver. 11.2 (Stata Corp., College Station, TX, USA).
Results: The overall ACI for suicide deaths was -0.352 (95% confidence interval, -0.389 to -0.301). According to the results, 9.8% of socioeconomic inequality in suicide deaths was due to addiction in attempters. ACI ranged from -0.34 to -0.03 in 2010–2014, showing that inequality in suicide deaths declined over time.
Conclusion: Findings showed suicide deaths were distributed among the study population unequally, and our results confirmed a gap between advantaged and disadvantaged attempters in terms of death. Socioeconomic inequalities in suicide deaths tended to diminish over time, as suicide attempts progressed in Ilam Province.
Keywords: Inequality; Concentration Index; Socioeconomic Factors; Attempted Suicide

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