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Harjutsalo V, Sund R, Knip M, Groop P. Incidence of Type 1 Diabetes in Finland. JAMA. 2013;310(4):427–428. doi:https://doi.org/10.1001/jama.2013.8399
The incidence of type 1 diabetes (T1D), one of the most prevalent chronic disease in children, has increased worldwide.1 The highest recorded incidence in children younger than 15 years was 64.2 per 100 000 person-years in Finland in 2005.2 We examined the incidence rates between 2006 and 2011 in Finnish children younger than 15 years as well as the 32-year trend (1980-2011).
All children with newly diagnosed T1D were ascertained using several nationwide registers as previously described.2 Age-standardized and age-specific annual incidence rates for age groups 0-4, 5-9, and 10-14 years were calculated.
Changes in trends between 1980 and 2011 were identified using the Joinpoint Regression Program version 4.0.1 (National Cancer Institute; http://surveillance.cancer.gov/joinpoint). The study was approved by the ethics committee of the National Institute for Health and Welfare, Finland, as a part of the FinDM II database studies. A waiver of informed consent is not required for register-based studies in Finland.
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