Follow-up study on mortality in Korean stroke patients

Jee Hye Im; Kun Sei Lee; Keon Yeop Kim; Nam Soo Hong; Sang Won Lee; Hee Joon Bae

doi:10.5124/jkma.2011.54.11.1199

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Im, Lee, Kim, Hong, Lee, and Bae: Follow-up study on mortality in Korean stroke patients

Healthcare Policy

Journal of the Korean Medical Association

Journal of the Korean Medical Association 2011; 54(11): 1199-1208.

Published online: 15 November 2011

DOI: https://doi.org/10.5124/jkma.2011.54.11.1199

Follow-up study on mortality in Korean stroke patients

Jee Hye Im, Ph.D¹, Kun Sei Lee, MD², Keon Yeop Kim, MD³, Nam Soo Hong, MD³, Sang Won Lee, MD⁴, Hee Joon Bae, MD⁵

¹Health Insurance Review & Assessment Institute, Health Insurance Review & Assessment Service, Seoul, Korea.

²Department of Preventive Medicine, Konkuk University School of Medicine, Seoul, Korea.

³Department of Preventive Medicine, Kyungpook National University School of Medicine, Daegu, Korea.

⁴Department of Preventive Medicine, CHA University, Gumi, Korea.

⁵Department of Neurology, Seoul National University Bundang Hospital, Seongnam-si, Korea.

Corresponding author: Keon Yeop Kim, pmkky@knu.ac.kr

Received 5 October 2011 Accepted 19 October 2011

(open-access):

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Stroke is the most common cause of death as single-diseases in South Korea. And it generates additional medical cost through high incidence of related disabilities and complications, which would become more important with the rapid aging process in Korean society. This study was preformed to identify stroke patients' mortality and its associated factors. Patients diagnosed as stroke (ICD-10 code I60-I63) in 2003 were identified. Their follow-up mortality rate in 5 years and related factors (stroke type, sex, age, type of first admission hospital, comorbidity score) were analyzed using national health insurance claim data and national cause of death statistics. The mortality rate peaked in early days after attack, and decreased subsequently as the survive time gets longer. The mortality rate was higher in hemorrhagic stroke than ischemic stroke, in female than male, with the older age, and with the higher comorbidity score. It is recommended that the early intervention at general hospital or tertiary referral hospital should be promoted to decrease the mortality rate in stroke patients, and related quality assurance programs have to be enforced.

Keywords: Stroke, Mortality, Follow-up studies, Health insurance claim data

Figures and Tables

Figure 1

Survival curves of hemorrhagic and ischemic stroke.

Table 1

General characteristics of subjects

Table 2

Case fatality rate by the time of death

Table 3

The results of Cox regression by the time of death

Acknowledgment

This study was supported by Health Insurence Review & Assessment Institute, Health Insurance Review & Assessment Service, Seoul, Korea.

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