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High Incidence And Remission Of Reported Food Hypersensitivity In Swedish Children Followed From 8 To 12 Years Of Age – A Population Based Cohort Study
Author: Anna Winberg, Åsa Strinnholm, Linnea Hedman, Christina E West, Matthew S Perzanowski And Eva Rönmark
Publisher: Derivative Works
9 pages
One time payment: €0.00
Required subscription: Free
Type of publication: Article
ISBN/ISSN: 2045-7022
DOI: 10.1186/2045-7022-4-32
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Background: Few population-based cohort studies have examined reported food hypersensitivity longitudinally. We investigated prevalence, incidence and remission of perceived food hypersensitivity among schoolchildren from 8 to 12 years of age, and risk factors associated with incidence and remission. Methods: A population-based cohort including all 7–8 year-old children in three Swedish towns was recruited in 2006. A total of 2,585 (96% of invited) children participated in a parental questionnaire. The children in two of the towns, n = 1,700 (90% of invited) also participated in skin-prick-testing with airborne allergens. The cohort was followed using the same methods at 11–12 years of age. At study follow up, specific IgE to foods was analyzed in a randomized subset of children (n = 652). Results: The prevalence of perceived food hypersensitivity increased from 21% at 8 years to 26% at 12 years of age. During this four-year-period, the cumulative incidence of food hypersensitivity was high (15%), as was remission (33%). This pattern was particularly evident for hypersensitivity to cow´s milk, while the incidence of hypersensitivity to other foods was lower. Female sex, allergic heredity, current rhinitis and allergic sensitization were associated with the incidence of food hypersensitivity and allergic sensitization was negatively associated with remission. Risk-factor-patterns for both incidence and remission were different for hypersensitivity to milk compared with hypersensitivity to other foods. Generally, the agreement between reported food hypersensitivity and IgE-sensitization to the implicated food was poor. Conclusions: In this longitudinal, population-based cohort-study perceived food hypersensitivity was common among children between ages 8 and 12, often transient and not well correlated with food-specific IgE. While these findings suggest an overestimated prevalence of food hypersensitivity, the public-health-significance remains high as they reflect the perceived reality to which the children adapt their life and food intakes.

Conclusions: In this longitudinal, population-based cohort-study perceived food hypersensitivity was common amongchildren between ages 8 and 12, often transient and not well correlated with food-specific IgE. While these findings suggestan overestimated prevalence of food hypersensitivity, the public-health-significance remains high as they reflect theperceived reality to which the children adapt their life and food intakes.

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