Epidemiologic characteristics of diabetes in children aged 0–14 years in Busan and Gyeonnam Province, Korea (2001–2010)

Methods We sent questionnaires via the post to 4 tertiary and 43 general hospitals in Busan and Gyeonnam province. We received answered questionnaires based on medical records from all tertiary and 11 general hospitals. Three hundred forty four diabetic patients (239 T1DM, 89 T2DM, 16 unclassified DM) who were newly diagnosed from 2001 to 2010 were enrolled. The incidence rates were calculated as the number of cases per 100,000 person-years. The denominator for incidence rate was secondary data from the population registry (Korea National Statistical Office). Ninety five percent confidence intervals (95% CI) was calculated using Poisson distribution. The incidence rate was fitted and test for the linear trend was done by Poisson linear regression model. We also used the Poisson regressions to assess the rate ratio for development of diabetes with year, sex, age group, geographic location. The data were analyzed using SAS 9.2.