Temporal trend of first-ever ischaemic stroke incidence from 2010 to 2019 in South Korea: a nationwide retrospective cohort study

Abstract

ObjectiveIschaemic stroke incidence is on the decline globally, but the trend in South Korea is unknown. In this study, the 10-year incidence trends of first-ever ischaemic stroke in South Korea were evaluated.Design, setting and participantsThe National Health Insurance Services medical claim data were used to construct 10 annual cohorts of adults aged 20 years and older, who had not been diagnosed with stroke, to find out the incidence trends of first-ever ischaemic stroke from 2010 to 2019.Outcome measuresThe primary outcomes were crude and age-adjusted incidence rates for 10 years. Crude incidence rates of the age groups and incidence age statistics were calculated. For comparison among the income groups, age-adjusted incidence rates were used. Incidence rates in all the groups were analysed separately by sex.ResultsAge-standardised incidence rates of ischaemic stroke per 100 000 were 101.0 in men, and 67.6 in women in 2010; and 92.2 in men, and 55.0 in women in 2019. By age group, there was a decrease in women over 40 years of age, and men over 60 years of age. The relative difference in stroke incidence rates between medical aid beneficiaries and the highest income group increased from 1.5 to 1.87 over 10 years.ConclusionsAge-standardised incidence rate of ischaemic stroke has decreased from 2010 to 2019 for both man and women. The incidence rate was stable in the younger age groups and decreased in the older age groups, and the disparities between income groups have widened over the past decade. Stroke prevention strategies are needed for the younger age group and the low-income group. Further research is needed to study the risk factors contributing to the incidence of ischaemic stroke in different groups.

Incidence of Retinal Artery Occlusion and Related Mortality in Korea, 2005 to 2018

“…Stroke incidence varied greatly by country and region (eg, 92.2 to 232 per 100 000 person-years in Korea, 1.95 to 4.17 per 1000 person-years in China) . According to 1 report, the ischemic stroke in Korea was 92.2 per 100 000 person-years in men and 55.0 in women . Despite substantial variations, stroke incidence was higher than that of RAO and, like RAO, showed a tendency to increase with age .…”

Risk Factors and Prognosis of Stroke in Gynecologic Cancer Patients

“…Additionally, the fact that stroke was not identified as an independent prognostic factor in our cancer patients may imply an advanced and well-organized healthcare system in Korea [47]. As advancements in modern medicine have improved the survival and life expectancy of patients with cancer, the incidence rate of stroke has also increased [48]. Moreover, developments in imaging studies such as magnetic resonance imaging (MRI) with improved health insurance coverage have led to the early diagnosis of stroke and medical interventions, resulting in improved mortality rates of 12.8% from 2014 to 2019 [47,49,50].…”