L C Stene1, P Magnus, R T Lie, O Søvik, G Joner. 1. Diabetes Research Centre, Aker and Ullevål University Hospitals, Department of Paediatrics, Ullevål Hospital, N-0407 Oslo, Norway. lars.christian.stene@folkehelsa.no
Abstract
OBJECTIVE: To estimate the associations of maternal and paternal age at delivery and of birth order with the risk of childhood onset type 1 diabetes. DESIGN: Cohort study by record linkage of the medical birth registry and the national childhood diabetes registry in Norway. SETTING: Norway. SUBJECTS: All live births in Norway between 1974 and 1998 (1.4 million people) were followed for a maximum of 15 years, contributing 8.2 million person years of observation during 1989-98. 1824 cases of type 1 diabetes diagnosed between 1989 and 1998 were identified. MAIN OUTCOME MEASURES: Incidence of type 1 diabetes. RESULTS: There was no association between maternal age at delivery and type 1 diabetes among firstborn children, but among fourth born children there was a 43.2% increase in incidence of diabetes for each five year increase in maternal age (95% confidence interval 6.4% to 92.6%). Each increase in birth order was associated with a 17.9% reduction in incidence (3.2% to 30.4%) when maternal age was 20-24 years, but the association was weaker when maternal age was 30 years or more. Paternal age was not associated with type 1 diabetes after maternal age was adjusted for. CONCLUSIONS: Intrauterine factors and early life environment may influence the risk of type 1 diabetes. The relation of maternal age and birth order to risk of type 1 diabetes is complex.
OBJECTIVE: To estimate the associations of maternal and paternal age at delivery and of birth order with the risk of childhood onset type 1 diabetes. DESIGN: Cohort study by record linkage of the medical birth registry and the national childhood diabetes registry in Norway. SETTING: Norway. SUBJECTS: All live births in Norway between 1974 and 1998 (1.4 million people) were followed for a maximum of 15 years, contributing 8.2 million person years of observation during 1989-98. 1824 cases of type 1 diabetes diagnosed between 1989 and 1998 were identified. MAIN OUTCOME MEASURES: Incidence of type 1 diabetes. RESULTS: There was no association between maternal age at delivery and type 1 diabetes among firstborn children, but among fourth born children there was a 43.2% increase in incidence of diabetes for each five year increase in maternal age (95% confidence interval 6.4% to 92.6%). Each increase in birth order was associated with a 17.9% reduction in incidence (3.2% to 30.4%) when maternal age was 20-24 years, but the association was weaker when maternal age was 30 years or more. Paternal age was not associated with type 1 diabetes after maternal age was adjusted for. CONCLUSIONS: Intrauterine factors and early life environment may influence the risk of type 1 diabetes. The relation of maternal age and birth order to risk of type 1 diabetes is complex.
Authors: N Lammi; E Moltchanova; P Blomstedt; J G Eriksson; O Taskinen; C Sarti; J Tuomilehto; M Karvonen Journal: Diabetologia Date: 2007-10-18 Impact factor: 10.122
Authors: Marisa A D'Angeli; Eugene Merzon; Luisa F Valbuena; David Tirschwell; Carolyn A Paris; Beth A Mueller Journal: Arch Pediatr Adolesc Med Date: 2010-08
Authors: C R Cardwell; L C Stene; G Joner; O Cinek; J Svensson; M J Goldacre; R C Parslow; P Pozzilli; G Brigis; D Stoyanov; B Urbonaite; S Sipetić; E Schober; C Ionescu-Tirgoviste; G Devoti; C E de Beaufort; K Buschard; C C Patterson Journal: Diabetologia Date: 2008-02-22 Impact factor: 10.122
Authors: Chris R Cardwell; Lars C Stene; Geir Joner; Max K Bulsara; Ondrej Cinek; Joachim Rosenbauer; Johnny Ludvigsson; Mireia Jané; Jannet Svensson; Michael J Goldacre; Thomas Waldhoer; Przemyslawa Jarosz-Chobot; Suely G A Gimeno; Lee-Ming Chuang; Roger C Parslow; Emma J K Wadsworth; Amanda Chetwynd; Paolo Pozzilli; Girts Brigis; Brone Urbonaite; Sandra Sipetic; Edith Schober; Gabriele Devoti; Constantin Ionescu-Tirgoviste; Carine E de Beaufort; Denka Stoyanov; Karsten Buschard; Chris C Patterson Journal: Diabetes Date: 2009-10-29 Impact factor: 9.461