title: Down syndrome is associated with elevated risk of celiac disease: a nationwide case-control study.
abstract: OBJECTIVE
  To provide risk estimates for celiac disease (CD) in Down syndrome (DS) compared with the general population.
  
  
  METHODS
  In this nationwide Swedish case-control study, we examined the risk of CD in individuals with DS born between 1973 and 2008. Study participants consisted of 2 populations: 11,749 patients with biopsy-verified CD (villous atrophy [VA], equivalent to Marsh grade III) who were identified through histopathology reports from the 28 pathology departments in Sweden and 53,887 population-based controls matched for sex, age, calendar year of birth, and county of residence. We used prospectively recorded data from Swedish health registers to identify individuals with DS. ORs were calculated using conditional logistic regression.
  
  
  RESULTS
  Of the 11,749 individuals with CD, 165 had a diagnosis of DS (1.4%) compared with 55/53,887 controls (0.1%). This corresponded to an OR of 6.15 (95% CI = 5.09-7.43) for subsequent CD in individuals with DS compared with the general population. The association between DS and CD was not affected by maternal age at delivery, infant sex, or presence of type 1 diabetes mellitus in the child.
  
  
  CONCLUSIONS
  We found a sixfold increased risk of CD in individuals with DS. This study adds precision to the previously reported association between DS and CD.
authors: Department of Medicine, Örebro University, Örebro, Sweden. karlmarild@gmail.com
authors: Karl
authors: K
authors: Mårild
authors: Olof
authors: O
authors: Stephansson
authors: Lena
authors: L
authors: Grahnquist
authors: Sven
authors: S
authors: Cnattingius
authors: Gabriella
authors: G
authors: Söderman
authors: Jonas F
authors: JF
authors: Ludvigsson
mesh_terms: D016022:Case-Control Studies; D002446:Celiac Disease / Q000453:epidemiology* / Q000209:etiology*; D002648:Child; D002675:Child, Preschool; D004314:Down Syndrome / Q000150:complications*; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D012042:Registries; D012307:Risk Factors; D013548:Sweden / Q000453:epidemiology