An evaluation of sampling design for estimating an epidemiologic volume of diabetes and for assessing present status of its control in Korea

Ji Sung Lee, Jaiyong Kim, Sei-Hyun Baik, Ie Byung Park, Juneyoung Lee

Research output: Contribution to journalArticle

2 Citations (Scopus)


Objectives : An appropriate sampling strategy for estimating an epidemiologic volume of diabetes has been evaluated through a simulation. Methods : We analyzed about 250 million medical insurance claims data submitted to the Health Insurance Review & Assessment Service with diabetes as principal or subsequent diagnoses, more than or equal to once per year, in 2003. The database was re-constructed to a patient-hospital profile that had 3,676,164 cases, and then to a patient profile that consisted of 2,412,082 observations. The patient profile data was then used to test the validity of a proposed sampling frame and methods of sampling to develop diabetic-related epidemiologic indices. Results : Simulation study showed that a use of a stratified two-stage cluster sampling design with a total sample size of 4,000 will provide an estimate of 57.04% (95% prediction range, 49.83 - 64.24%) for a treatment prescription rate of diabetes. The proposed sampling design consists, at first, stratifying the area of the nation into metropolitan/city/county and the types of hospital into tertiary/secondary/primary/clinic with a proportion of 5:10:10:75. Hospitals were then randomly selected within the strata as a primary sampling unit, followed by a random selection of patients within the hospitals as a secondly sampling unit. The difference between the estimate and the parameter value was projected to be less than 0.3%. Conclusions : The sampling scheme proposed will be applied to a subsequent nationwide field survey not only for estimating the epidemiologic volume of diabetes but also for assessing the present status of nationwide diabetes control.

Original languageEnglish
Pages (from-to)135-142
Number of pages8
JournalJournal of Preventive Medicine and Public Health
Issue number2
Publication statusPublished - 2009 Mar 1



  • Diabetes mellitus
  • Epidemiologic indices
  • Insurance claim review data
  • Simulation
  • Stratified two-stage cluster sampling

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health

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