Long-Term Effect of Income Level on Mortality after Stroke: A Nationwide Cohort Study in South Korea

Seungmin Jeong, Sung-il Cho and So Yeon Kong
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Seungmin Jeong: Department of Preventive Medicine, Kangwon National University Hospital, Chuncheon-si, Gangwon-do 24289, Korea
Sung-il Cho: Department of Public Health Science, Graduate School of Public Health, and Institute of Health and Environment, Seoul National University, Seoul 08826, Korea
So Yeon Kong: Strategic Research, Laerdal Medical, 4002 Stavanger, Norway

IJERPH, 2020, vol. 17, issue 22, 1-11

Abstract: We investigated whether income level has long-term effects on mortality rate in stroke patients and whether this varies with time after the first stroke event, using the National Health Insurance Service National Sample Cohort data from 2002 to 2015 in South Korea. The study population was new-onset stroke patients ≥18 years of age. Patients were categorized into Category (1) insured employees and Category (2) insured self-employed/Medical Aid beneficiaries. Each category was divided into three and four income level groups, retrospectively. The study population comprised of 11,668 patients. Among the Category 1 patients ( n = 7720), the low-income group’s post-stroke mortality was 1.15-fold higher than the high-income group. Among the Category 2 patients ( n = 3948), the lower income groups had higher post-stroke mortality than the high-income group (middle-income, aOR (adjusted odds ratio) 1.29; low-income, aOR 1.70; Medical Aid beneficiaries, aOR 2.19). In this category, the lower income groups’ post-stroke mortality risks compared to the high-income group were highest at 13–36 months after the first stroke event(middle-income, aOR 1.52; low-income, aOR 2.31; Medical Aid beneficiaries, aOR 2.53). Medical Aid beneficiaries had a significantly higher post-stroke mortality risk than the high-income group at all time points.

Keywords: stroke; mortality; socioeconomic factors; healthcare disparities (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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