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The contribution of different causes-of-death to socioeconomic mortality inequality in Korean children aged 1-9: Findings from a national mortality follow-up study
  1. Kyunghee Jung-Choi1,
  2. Young-Ho Khang2,*
  1. 1 Department of Preventive Medicine, Ewha Womans University School of Medicine, Korea, Republic of;
  2. 2 Department of Preventive Medicine, University of Ulsan College of Medicine, Seoul, Korea, Republic of
  1. Correspondence to: Young-Ho Khang, Department of Preventive Medicine, University of Ulsan College of Medicine, Department of Preventive Medicine, University of Ulsan College of Medicine, 388-1 Pungnap-2dong Songpa-gu, Seoul, 138-736, Korea, Republic of; youngk{at}amc.seoul.kr

Abstract

Objectives: To determine the contribution of different causes of death to absolute socioeconomic inequalities in mortality for the whole population of children of South Korea aged 1-4 years and 5-9 years.

Methods: A cohort study based on the national birth and death registers of Korea was performed for 3,724,347 children born in 1995-2000 and 657,209 children born in 1995 to analyze mortality among children aged 1-4 and 5-9 years old, respectively. Adjusted mortality rates, risk difference (RD), slope index of inequality (SII), risk ratio and relative index of inequality were calculated. The contribution of different causes of death to absolute mortality inequalities were calculated as percentages based on RD and SII.

Results: Injuries other than transport accidents contributed the most to total SIIs for male deaths at ages 1-4 (30.0% for father's education). The second largest contribution was made by transport accidents (19.6% for father's education). For male deaths at ages 5-9, transport accidents and other injuries also accounted for most of the educational and occupational differentials in absolute mortality rates (63.5%-90.5%). Patterns in cause-specific contribution to total inequalities in mortality among girls were generally similar to those among boys.

Conclusions: The major contributing causes to absolute socioeconomic inequality in all-cause mortality for children aged 1-9 were external. To reduce the absolute magnitude of socioeconomic inequalities in childhood mortality, policy efforts directed toward injuries are warranted in South Korea.

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