title: Substantial proportion of MODY among multiplex families participating in a Type 1 diabetes prediction programme.
abstract: Patients with maturity-onset diabetes of the young (MODY) might be over-represented in families with histories of Type 1 diabetes. Our aim was to re-evaluate families participating in the Czech T1D Prediction Programme (PREDIA.CZ) with at least two members affected with diabetes to assess the proportion of MODY among these families and determine its most significant clinical predictors.
  
  
  
  Of the 557 families followed up by the PREDIA.CZ, 53 (9.5%) had two or more family members with diabetes. One proband with diabetes from these families was chosen for direct sequencing of the GCK, HNF1A, HNF4A and INS genes. Non-parametric tests and a linear logistic regression model were used to evaluate differences between MODY and non-MODY families.
  
  
  
  MODY was genetically diagnosed in 24 of the 53 families with multiple occurrences of diabetes (45%). Mutations were detected most frequently in GCK (58%), followed by HNF1A (38%) and INS (4%). MODY families were more likely to have a parent with diabetes and had a higher proportion of females with diabetes than non-MODY families. Higher age (P < 0.001), a lower level of HbA1c(P < 0.001) at clinical onset and at least two generations affected by diabetes were the variables most predictive for probands of MODY families already presenting with diabetes.
  
  
  
  A prediction programme for Type 1 diabetes would provide a useful new source of patients with MODY most likely to benefit from an accurate diagnosis. This identification has implications for patient treatment and disease prognosis.
authors.affiliation: Department of Paediatrics, University Hospital Motol and 2nd Faculty of Medicine, Charles University in Prague, Prague, Czech Republic.
authors.forename: L
authors.initials: L
authors.lastname: Petruzelkova
authors.affiliation: Department of Paediatrics, University Hospital Motol and 2nd Faculty of Medicine, Charles University in Prague, Prague, Czech Republic.
authors.forename: P
authors.initials: P
authors.lastname: Dusatkova
authors.affiliation: Department of Paediatrics, University Hospital Motol and 2nd Faculty of Medicine, Charles University in Prague, Prague, Czech Republic.
authors.forename: O
authors.initials: O
authors.lastname: Cinek
authors.affiliation: Department of Paediatrics, University Hospital Motol and 2nd Faculty of Medicine, Charles University in Prague, Prague, Czech Republic.
authors.forename: Z
authors.initials: Z
authors.lastname: Sumnik
authors.affiliation: Department of Paediatrics, University Hospital Motol and 2nd Faculty of Medicine, Charles University in Prague, Prague, Czech Republic.
authors.forename: S
authors.initials: S
authors.lastname: Pruhova
authors.affiliation: Department of Paediatrics, University Hospital Motol and 2nd Faculty of Medicine, Charles University in Prague, Prague, Czech Republic.
authors.forename: O
authors.initials: O
authors.lastname: Hradsky
authors.affiliation: Department of Paediatrics, University Hospital Motol and 2nd Faculty of Medicine, Charles University in Prague, Prague, Czech Republic.
authors.forename: J
authors.initials: J
authors.lastname: Vcelakova
authors.affiliation: Department of Paediatrics, University Hospital Motol and 2nd Faculty of Medicine, Charles University in Prague, Prague, Czech Republic.
authors.forename: J
authors.initials: J
authors.lastname: Lebl
authors.affiliation: Department of Paediatrics, University Hospital Motol and 2nd Faculty of Medicine, Charles University in Prague, Prague, Czech Republic.
authors.forename: S
authors.initials: S
authors.lastname: Kolouskova
mesh_terms: D000293:Adolescent; D000328:Adult; D017668:Age of Onset; D000368:Aged; D002648:Child; D002675:Child, Preschool; D018153:Czech Republic / Q000453:epidemiology; D003922:Diabetes Mellitus, Type 1 / Q000453:epidemiology / Q000235:genetics*; D003924:Diabetes Mellitus, Type 2 / Q000453:epidemiology / Q000235:genetics*; D005260:Female; D006442:Glycated Hemoglobin / Q000378:metabolism; D006579:Heterozygote; D006801:Humans; D008297:Male; D008875:Middle Aged; D009154:Mutation / Q000235:genetics*; D015995:Prevalence; D055815:Young Adult
chemical_list: D006442:Glycated Hemoglobin