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Season and region of birth as risk factors for coeliac disease a key to the aetiology?
Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Epidemiologi och global hälsa. (Umeå SIMSAM Lab)ORCID-id: 0000-0001-5471-9043
Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Epidemiologi och global hälsa.
Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för kostvetenskap.
Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Epidemiologi och global hälsa. (Umeå SIMSAM Lab)ORCID-id: 0000-0001-2558
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2016 (Engelska)Ingår i: Archives of Disease in Childhood, ISSN 0003-9888, E-ISSN 1468-2044, Vol. 101, nr 12, s. 1114-1118Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

BACKGROUND: Coeliac disease (CD) incidence has increased in recent decades, characterised by variations according to sex, age at diagnosis, year of birth, month of birth and region of birth. Genetic susceptibility and exposure to gluten are the necessary factors in CD aetiology, although several environmental factors are considered.

METHODS: A nationwide prospective cohort longitudinal study was conducted consisting of 1 912 204 children aged 0-14.9 years born in Sweden from 1991 to 2009. A total of 6569 children were diagnosed with biopsy-verified CD from 47 paediatric departments. Using Cox regression, we examined the association between CD diagnosis and season of birth, region of birth and year of birth.

RESULTS: Overall, CD risk was higher for children born during spring, summer and autumn as compared with children born during winter: adjusted HR for spring 1.08 (95% CI 1.01 to 1.16), summer 1.10 (95% CI 1.03 to 1.18) and autumn 1.10 (95% CI 1.02 to 1.18). Increased CD risk was highest if born in the south, followed by central Sweden when compared with children born in northern Sweden. Children diagnosed at <2 years had an increased CD risk if born in spring while those diagnosed at 2-14.9 years the risk was increased for summer and autumn births. The birth cohort of 1991-1996 had increased CD risk if born during spring, for the 1997-2002 birth cohort the risk increased for summer and autumn births, while for the birth cohort of 2003-2009 the risk was increased if born during autumn.

CONCLUSIONS: Season of birth and region of birth are independently and jointly associated with increased risk of developing CD during the first 15 years of life. Seasonal variation in infectious load is the likely explanation.

Ort, förlag, år, upplaga, sidor
BMJ Publishing Group Ltd, 2016. Vol. 101, nr 12, s. 1114-1118
Nationell ämneskategori
Folkhälsovetenskap, global hälsa, socialmedicin och epidemiologi Gastroenterologi Pediatrik
Identifikatorer
URN: urn:nbn:se:umu:diva-124646DOI: 10.1136/archdischild-2015-310122ISI: 000388822900011PubMedID: 27528621OAI: oai:DiVA.org:umu-124646DiVA, id: diva2:953895
Tillgänglig från: 2016-08-19 Skapad: 2016-08-19 Senast uppdaterad: 2018-06-07Bibliografiskt granskad

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Namatovu, FredinahLindkvist, MarieOlsson, CeciliaIvarsson, AnneliSandström, Olof

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