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Atopy among schoolchildren in northern and southern Sweden in relation to pet ownership and early life events
Linköping University, Faculty of Health Sciences. Linköping University, Department of Molecular and Clinical Medicine, Pediatrics.
Linköping University, Faculty of Health Sciences. Linköping University, Department of Molecular and Clinical Medicine, Pediatrics. Östergötlands Läns Landsting, Centre of Paediatrics and Gynecology and Obstetrics, Barn.
2001 (English)In: Pediatric Allergy and Immunology, ISSN 0905-6157, E-ISSN 1399-3038, Vol. 12, no 1Article in journal (Refereed) Published
Abstract [en]

Studies have suggested a higher prevalence of asthma and allergies in northern, as compared to southern. Scandinavia. The aim of this study was to evaluate regional differences in atopy in relation to pet ownership and certain early life events among schoolchildren. (n=2108) aged 10-11 years from Link÷ping in southern Sweden and ╓stersund in northern Sweden. The parents completed a questionnaire, comprising questions on home environment, heredity, socio-economic conditions, and the core questions on symptoms from the International Study of Asthma and Allergies in Childhood. The children were skin-prick tested to eight common inhalant allergens. Information on maternal smoking habits, gestational age, and anthropometric measures were obtained from the Swedish Medical Birth Registry. The prevalence of atopic symptoms and sensitization to pollen were similar in ╓stersund and in Link÷ping. A higher prevalence of sensitization to animal dander among children in ╓stersund could be linked to a higher occurrence of pets in the community. Current cat ownership was related to less sensitivity to cat allergen but only in children with an atopic heredity. Ponderal index >30 kg/m3 was related to an increased risk of atopic sensitization, both in Link÷ping (adjusted odds ratio 2.1, 95% confidence interval 1.1-4.0) and in ╓stersund (adjusted odds ratio 2.0, 95% confidence interval 1.1-3.5). Maternal smoking during pregnancy was related to an increased risk of atopic sensitization among children in Link÷ping, whereas current smoking was associated with a decreased risk of sensitization in -stersund. In conclusion, we demonstrated that a high occurrence of pets in the community was associated with sensitization, whereas atopic symptoms were essentially unaffected. This study has also suggested an association between body size at birth and atopic sensitization at 10-11 years of age.

Place, publisher, year, edition, pages
2001. Vol. 12, no 1
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:liu:diva-25852DOI: 10.1034/j.1399-3038.2001.012001004.xLocal ID: 10289OAI: oai:DiVA.org:liu-25852DiVA: diva2:246400
Available from: 2009-10-08 Created: 2009-10-08 Last updated: 2017-12-13

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