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Title: Fertility is reduced in women and in men with type 1 diabetes: Results from the Type 1 Diabetes Genetics Consortium (T1DGC)
Authors: Wiebe ---,Julia 
Santana, Angelo 
Medina-Rodríguez, Nathan
Hernández, Marta
Novoa Mogollón, Francisco 
Mauricio, Dídac
Wägner, Ana M. 
UNESCO Clasification: 32 Ciencias médicas
240401 Bioestadística
Keywords: Fertility
Type 1 diabetes
Issue Date: 2014
Journal: Diabetologia (Berlin) 
Abstract: A recent Finnish study described reduced fertility in patients with childhood-onset type 1 diabetes. The Type 1 Diabetes Genetics Consortium (T1DGC) is an international programme studying the genetics and pathogenesis of type 1 diabetes that includes families with the disease. Our aim was to assess fertility, defined as number of offspring, in the affected and unaffected siblings included in the T1DGC.Clinical information from participants aged a parts per thousand yen18 years at the time of examination was included in the present analysis. The number of offspring of affected and unaffected siblings was compared (in families including both) and the influence of birth year, disease duration and age of onset was assessed, the last in affected siblings only, using Poisson regression models.A total of 3010 affected and 801 unaffected adult siblings that belonged to 1761 families were assessed. The mean number of offspring was higher in the unaffected than in the affected individuals, and the difference between the two groups was more pronounced in women than men. Poisson regression analysis showed that both sex and birth cohort significantly affected the differences between groups. In the affected siblings, adult onset (a parts per thousand yen18 years), female sex and older birth cohort were associated with higher fertility.Patients with type 1 diabetes have fewer children than their unaffected siblings. This effect is more evident in women and in older birth cohorts. Onset of type 1 diabetes as an adult rather than a child is associated with a higher number of offspring, even after accounting for birth cohort and disease duration.
ISSN: 0012-186X
DOI: 10.1007/s00125-014-3376-8
Source: Diabetologia[ISSN 0012-186X],v. 57, p. 2501-2504
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