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

Authors
Lee, J.-S.Kim, J.Baik, S.-H.Park, I.-B.Lee, J.
Issue Date
2009
Keywords
Diabetes mellitus; Epidemiologic indices; Insurance claim review data; Simulation; Stratified two-stage cluster sampling
Citation
Journal of Preventive Medicine and Public Health, v.42, no.2, pp.135 - 142
Indexed
SCOPUS
KCI
Journal Title
Journal of Preventive Medicine and Public Health
Volume
42
Number
2
Start Page
135
End Page
142
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/121848
DOI
10.3961/jpmph.2009.42.2.135
ISSN
1975-8375
Abstract
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.
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