title: Epidemiology of Type 1 Diabetes Mellitus in Korea through an Investigation of the National Registration Project of Type 1 Diabetes for the Reimbursement of Glucometer Strips with Additional Analyses Using Claims Data.
abstract: BACKGROUND
  The aim of this study was to estimate the prevalence and incidence of type 1 diabetes mellitus (T1DM) in Korea. In addition, we planned to do a performance analysis of the Registration Project of Type 1 diabetes for the reimbursement of consumable materials.
  
  
  METHODS
  To obtain nationwide data on the incidence and prevalence of T1DM, we extracted claims data from July 2011 to August 2013 from the Registration Project of Type 1 diabetes on the reimbursement of consumable materials in the National Health Insurance (NHI) Database. For a more detailed analysis of the T1DM population in Korea, stratification by gender, age, and area was performed, and prevalence and incidence were calculated.
  
  
  RESULTS
  Of the 8,256 subjects enrolled over the 26 months, the male to female ratio was 1 to 1.12, the median age was 37.1 years, and an average of 136 new T1DM patients were registered to the T1DM registry each month, resulting in 1,632 newly diagnosed T1DM patients each year. We found that the incidence rate of new T1DM cases was 3.28 per 100,000 people. The average proportion of T1DM patients compared with each region's population was 0.0125%. The total number of insurance subscribers under the universal compulsory NHI in Korea was 49,662,097, and the total number of diabetes patients, excluding duplication, was 3,762,332.
  
  
  CONCLUSIONS
  The prevalence of T1DM over the course of the study was approximately 0.017% to 0.021% of the entire population of Korea, and the annual incidence of T1DM was 3.28:100,000 overall and 3.25:100,000 for Koreans under 20 years old.
authors.affiliation: Department of Endocrinology and Metabolism, National Health Insurance Service Ilsan Hospital, Goyang, Korea.
authors.forename: Sun Ok
authors.initials: SO
authors.lastname: Song
authors.affiliation: Department of Endocrinology and Metabolism, National Health Insurance Service Ilsan Hospital, Goyang, Korea. ydsyko@gmail.com.
authors.forename: Young Duk
authors.identifier: http://orcid.org/0000-0001-5397-1458
authors.initials: YD
authors.lastname: Song
authors.affiliation: Department of Endocrinology and Metabolism, National Health Insurance Service Ilsan Hospital, Goyang, Korea.
authors.forename: Joo Young
authors.initials: JY
authors.lastname: Nam
authors.affiliation: Department of Endocrinology and Metabolism, National Health Insurance Service Ilsan Hospital, Goyang, Korea.
authors.forename: Kyeong Hye
authors.initials: KH
authors.lastname: Park
authors.affiliation: National Health Insurance Service, Seoul, Korea.
authors.forename: Ji Hae
authors.initials: JH
authors.lastname: Yoon
authors.affiliation: National Health Insurance Service, Seoul, Korea.
authors.forename: Kyung Mi
authors.initials: KM
authors.lastname: Son
authors.affiliation: National Health Insurance Service, Seoul, Korea.
authors.forename: Young
authors.initials: Y
authors.lastname: Ko
authors.affiliation: National Health Insurance Service, Seoul, Korea.
authors.forename: Dong Ha
authors.initials: DH
authors.lastname: Lim
keywords: Diabetes mellitus, type 1; Epidemiology; Incidence; Korea