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The cumulative incidence and trends of rare diseases in South Korea: a nationwide study of the administrative data from the National Health Insurance Service database from 2011-2015

Authors
 Sung-Shil Lim  ;  Wanhyung Lee  ;  Yeong-Kwang Kim  ;  Jihyun Kim  ;  Jong Heon Park  ;  Bo Ram Park  ;  Jin-Ha Yoon 
Citation
 ORPHANET JOURNAL OF RARE DISEASES, Vol.14(1) : 49, 2019 
Journal Title
 ORPHANET JOURNAL OF RARE DISEASES 
Issue Date
2019
Keywords
Administrative data ; Incidence ; Population-based ; Rare disease
Abstract
BACKGROUND: The burden of rare diseases on society and patients' families has increased in Korea. However, because of the infrequency of rare diseases, there is a lack of resources and information to address these cases and inadequate funding for the management of these patients. We investigated the average annual cumulative incidence of rare diseases and the trends in annual cumulative incidence from 2011 to 2015 in Korea by using nationwide administrative data from the Korean National Health Insurance Service (NHIS) database for patients registered with the co-payment assistance policy for rare and incurable diseases. Annual cumulative incidence per 10,000,000 was calculated as the total number of newly enrolled patients with the Korean Standard Classification of Diseases (KCD)-7 code in the register, divided by the number of residents with health insurance coverage during each year. We employed simple linear regression analysis to evaluate the trends in annual cumulative incidence/10,000,000 population per year for each rare disease. RESULTS: Overall, national support was provided for patients with 415 KCD codes listed among the targeted rare diseases. The total number of newly enrolled patients with rare diseases was 53,831 in 2011, 52,658 in 2012, 52,955 in 2013, 71,530 in 2014, and 70,559 in 2015. The number of rare diseases with an average annual cumulative incidence of 100/10,000,000 and above was 22 (5.30%), while there were 227 (54.70%) and 148 (35.66%) with an average cumulative incidence between 1/10,000,000 and 100/10,000,000 and less than 1/10,000,000, respectively. The trends in the annual cumulative incidence for 43 rare diseases were statistically significant (p-value < 0.05). The rare diseases for which the incremental trend per year was statistically significant were sarcoidosis (D86, D86.0, D86.1, D86.2, D86.3, D86.8, D86.9), Parkinson's disease (G20), Guillain-Barré syndrome (G61.0), primary biliary cirrhosis (K74.3) and Sjogren's syndrome (M35.0). CONCLUSIONS: The number of rare diseases showing an increasing trend in annual cumulative incidence was higher than the number of diseases showing a decreasing trend in annual cumulative incidence. Given that the definition and diagnosis vary based on country and that there is difficulty in identifying valid cases, further detection strategies are needed to establish the incidence of each rare disease considering the importance of establishing a health policy based on the actual incidence of the targeted diseases.
DOI
10.1186/s13023-019-1032-6
Appears in Collections:
7. Others (기타) > Others (기타) > 1. Journal Papers
Yonsei Authors
Kim, Yeong Kwang(김영광)
Kim, Ji Hyun(김지현)
Yoon, Jin Ha(윤진하) ORCID logo https://orcid.org/0000-0003-4198-2955
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/169544
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