No Association between Preeclampsia or Cesarean Section and Incidence of Type 1 Diabetes among Children: A Large, Population-Based Cohort Study

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The objective was to investigate whether selected perinatal factors, as indicators of perinatal exposures, are associated with the risk of type 1 diabetes in children. Specifically, we tested whether maternal preeclampsia, Rhesus-immunization, induced labor, cesarean section, and multiple birth were associated with incidence of type 1 diabetes. A cohort study was designed by linking records of the Medical Birth Registry and the National Childhood Diabetes Registry of Norway. Live births in the study period were followed for a maximum of 15 y and contributed 8,166,731 person-years between 1989 and 1998. Altogether, 1824 cases of type 1 diabetes diagnosed between 1989 and 1998 were identified within the cohort. There was a suggestive, but nonsignificant, increase in risk of type 1 diabetes associated with Rhesus-immunization. Maternal preeclampsia, cesarean section, and the other perinatal factors investigated in this study were not significantly associated with incidence of type 1 diabetes in the children. Previous indications that cesarean section and preeclampsia are associated with type 1 diabetes were not supported by this large study. The majority of routinely recorded perinatal factors are only weakly associated with type 1 diabetes, or not at all.

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The authors thank the staff at the Medical Birth Registry for their assistance.

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Correspondence to Lars C Stene.



Members of the Norwegian Childhood Diabetes Study Group. Henning Aabech, Fredrikstad; Helge Vogt, Nordbyhagen; Knut Dahl-Jørgensen, Oslo; Hans-Jacob Bangstad, Oslo; Geir Joner, Oslo; Kolbeinn Gudmundsson, Oslo; Olav Flesvig, Elverum; Halvor Baevre, Lillehammer; Ola Talleraas, Lillehammer; Kjell Stensvold, Drammen; Bjørn Halvorsen, Tønsberg; Kristin Hodnekvam, Porsgrunn; Ole Kr. Danielsen, Arendal; Jorunn Ulriksen, Kristiansand; Geir Stangeland, Kristiansand; John Bland, Stavanger; Dag Roness, Haugesund; Oddmund Søvik, Bergen; Per Helge Kvistad, Førde; Steinar Spangen, Ålesund; Per Eirik Hæreid, Trondheim; Sigurd Børsting, Levanger; Dag Veimo, Bodø; Harald Dramsdahl, Harstad; Kersti Thodenius, Hammerfest.

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