• Yi-Jing Sheen, Chih-Cheng Hsu, Yi-Der Jiang, Chien-Ning Huang, Jia-Sin Liu, and Wayne Huey-Herng Sheu.
• Division of Endocrinology and Metabolism, Department of Internal Medicine, Taichung Veterans General Hospital, Taiwan. Electronic address: docmedjean@gmail.com.
• J Formos Med Assoc. 2019 Nov 1; 118 Suppl 2: S66-S73.

Background/PurposeDiabetes mellitus (DM) and DM-related complications place a high socioeconomic burden on individuals and society. Updating nationwide information periodically is thus pivotal to preventing DM and improving its management in Taiwan.MethodsWe used the National Health Insurance Research Database; disease diagnosis codes were assigned according to the International Classification of Diseases, 9th Revision, Clinical Modification. DM was defined as ≥3 outpatient visits or 1 hospitalization within a year. We excluded individuals with gestational DM, those with missing data, and those aged >100 years. Type 1 DM (T1DM) was defined based on information from the catastrophic illness registry.ResultsFrom 2005 to 2014, total population with DM increased by 66% and age-standardized prevalence in patients aged 20-79 years increased by 41%. The DM prevalence was generally higher in men; however, the prevalence was higher in women aged ≥65 years. The prevalence of DM was approximately 50% in those aged >80 years. DM incidence increased by 19%; the increase was most obvious in patients aged 20-39 years (p < 0.001). The standardized incidence of T1DM slightly decreased by 11% (p = 0.118) and standardized prevalence of T1DM increased from 0.04% to 0.05%. Number of T1DM accounted for 0.51-0.59% of the entire diabetic population during the observation period.ConclusionDM prevalence is continually increasing, but the incidence only marginally increased from 2005 to 2014. Moreover, DM is a major problem in elderly people. The higher incidence of DM in men is consistent with the pandemic of overweight and obesity in men in Taiwan.Copyright © 2019. Published by Elsevier B.V.

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