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Article

Income-Related Mortality Inequalities and Its Social Factors among Middle-Aged and Older Adults at the District Level in Aging Seoul: An Ecological Study Using Administrative Big Data

1
Department of Sociology, College of Social Science, Changwon National University, Changwon-si 51140, Korea
2
Inequality and Social Policy Institute, Gachon University, Seongnam-si 13120, Korea
3
Department of Urban Society Research, Seoul Institute, Seoul 06756, Korea
4
Big Data Steering Department, National Health Insurance Service, Wonju-si 26464, Korea
*
Author to whom correspondence should be addressed.
Academic Editors: Jean Woo and Eric Lai
Int. J. Environ. Res. Public Health 2022, 19(1), 383; https://doi.org/10.3390/ijerph19010383
Received: 1 November 2021 / Revised: 21 December 2021 / Accepted: 28 December 2021 / Published: 30 December 2021
(This article belongs to the Special Issue Tackling Health Inequalities in Ageing Societies)
This study investigated income-related health inequality at sub-national level, focusing on mortality inequality among middle-aged and older adults (MOAs). Specifically, we examined income-related mortality inequality and its social factors among MOAs across 25 districts in Seoul using administrative big data from the National Health Insurance Service (NHIS). We obtained access to the NHIS’s full-population micro-data on both incomes and demographic variables for the entire residents of Seoul. Slope Index of Inequality (SII) and Relative Index of Inequality (RII) were calculated. The effects of social attributes of districts on SIIs and RIIs were examined through ordinary least squares and spatial regressions. There were clear income-related mortality gradients. Cross-district variance of mortality rates was greater among the lowest income group. SIIs were smaller in wealthier districts. Weak spatial correlation was found in SIIs among men. Lower RIIs were linked to lower Gini coefficients of income for both genders. SIIs (men) were associated with higher proportions of special occupational pensioners and working population. Lower SIIs and RIIs (women) were associated with higher proportions of female household heads. The results suggest that increasing economic activities, targeting households with female heads, reforming public pensions, and reducing income inequality among MOAs can be good policy directions. View Full-Text
Keywords: administrative big data; districts in Seoul; ecological study; socioeconomic characteristics of small area; SII; RII; spatial analysis administrative big data; districts in Seoul; ecological study; socioeconomic characteristics of small area; SII; RII; spatial analysis
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MDPI and ACS Style

Kim, M.; You, S.; You, J.-s.; Kim, S.-Y.; Park, J.H. Income-Related Mortality Inequalities and Its Social Factors among Middle-Aged and Older Adults at the District Level in Aging Seoul: An Ecological Study Using Administrative Big Data. Int. J. Environ. Res. Public Health 2022, 19, 383. https://doi.org/10.3390/ijerph19010383

AMA Style

Kim M, You S, You J-s, Kim S-Y, Park JH. Income-Related Mortality Inequalities and Its Social Factors among Middle-Aged and Older Adults at the District Level in Aging Seoul: An Ecological Study Using Administrative Big Data. International Journal of Environmental Research and Public Health. 2022; 19(1):383. https://doi.org/10.3390/ijerph19010383

Chicago/Turabian Style

Kim, Minhye, Suzin You, Jong-sung You, Seung-Yun Kim, and Jong H. Park. 2022. "Income-Related Mortality Inequalities and Its Social Factors among Middle-Aged and Older Adults at the District Level in Aging Seoul: An Ecological Study Using Administrative Big Data" International Journal of Environmental Research and Public Health 19, no. 1: 383. https://doi.org/10.3390/ijerph19010383

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