Diabetes Metab J.  2016 Feb;40(1):35-45. 10.4093/dmj.2016.40.1.35.

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

Affiliations
  • 1Department of Endocrinology and Metabolism, National Health Insurance Service Ilsan Hospital, Goyang, Korea. ydsyko@gmail.com
  • 2National Health Insurance Service, Seoul, Korea.

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.
CONCLUSION
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.

Keyword

Diabetes mellitus, type 1; Epidemiology; Incidence; Korea

MeSH Terms

Diabetes Mellitus, Type 1*
Epidemiology*
Female
Humans
Incidence
Insurance
Korea*
Male
National Health Programs
Prevalence

Figure

  • Fig. 1 Age at the time of enrollment to the Korean Type 1 Diabetes Mellitus Registry. This graph shows the age of registrants at the time of enrollment over 26 months. This is a mixture of incident and prevalent cases.

  • Fig. 2 Regional distribution of the registration rate in Korean Type 1 Diabetes Mellitus Registry compared with the local population (residence distribution).

  • Fig. 3 Monthly enrollment after insurance reimbursement project for type 1 diabetes mellitus consumables. (A) Total enrollment in all ages. The number of health insurance subscribers during the study period: 49,662,097; new registrants: 136/month, 1,632/year, 3.29/100,000/year. Black horizontal line: monthly average number of new registrants. (B) Total enrollment of individuals less than 20 years old. The number of health insurance subscribers less than 20 years old during the study period: 11,106,122; new registrants less than 20 years old: 30.07/month, 360.9/year, 3.25/100,000/year. Black horizontal line: monthly average number of new registrants less than 20 years old.


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