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Seasonal variation in the diagnosis of type 1 diabetes in south-east Sweden
Linköping University, Department of Molecular and Clinical Medicine, Pediatrics. Linköping University, Faculty of Health Sciences.
Linköping University, Department of Medical and Health Sciences, Division of Health and Society. Linköping University, Faculty of Health Sciences.
Östergötlands Läns Landsting, Centre for Public Health Sciences, Centre for Public Health Sciences. Linköping University, Faculty of Health Sciences.
Linköping University, Department of Molecular and Clinical Medicine, Child and Adolescent Psychiatry. Linköping University, Faculty of Health Sciences.
2007 (English)In: Diabetes Research and Clinical Practice, ISSN 0168-8227, E-ISSN 1872-8227, Vol. 76, no 1, 75-81 p.Article in journal (Refereed) Published
Abstract [en]

With the aim to survey the seasonal pattern of diagnosis of type 1 diabetes we included all 1903 children <16 years of age and who had been diagnosed with type 1 diabetes between 1977 and 2001 in the south-east of Sweden. To investigate the seasonal pattern a mixture of two cosine functions was included in a logistic regression model.

There was a clear seasonal variation over the years (p < 0.001). Children in the oldest age group (11–15 years) showed the most obvious seasonal variation (p < 0.001). Children with a short duration of symptoms had about the same seasonal variation as children with a long duration. Both children with and without an infection 3 months prior to diagnosis showed significant seasonal variation (p < 0.001) although the seasonal pattern differed between the two groups (p < 0.001). As the incidence of diabetes increased during the 25 years the study period was divided into periods of 5 years and it was only during the two last periods that significant seasonal variation occurred.

There is a clear seasonal variation in diagnosis of type 1 diagnosis in children and the results suggest that children with a less aggressive disease process at diagnosis were most responsible for this variation. Children with and without prior infection showed a different seasonal pattern.

Place, publisher, year, edition, pages
2007. Vol. 76, no 1, 75-81 p.
Keyword [en]
Type 1 diabetes, seasonality, pH-value, infection, duration of symptoms
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:liu:diva-39415DOI: 10.1016/j.diabres.2006.07.023Local ID: 48271OAI: oai:DiVA.org:liu-39415DiVA: diva2:260264
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2017-12-13Bibliographically approved

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Samuelsson, UlfCarstensen, JohnLöfman, OweNordfeldt, Sam

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