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    The level of pollen in Korea has increased over recent decades. Research suggests that oral allergy syndrome (OAS) may be more frequent in childhood than previously recognized. We aimed to investigate the prevalence and characteristics of OAS in children aged 6-10 years from a general-population-based birth cohort. We analyzed 930 children from the cohort for childhood origin of asthma and allergic diseases (COCOA). Allergic diseases were diagnosed annually by pediatric allergists. The skin prick tests were performed with 14 common inhalant allergens and four food allergens for the general population of children aged 3 and 7 years. Of the 930 eligible children, 44 (4.7%) aged 6-10 years were diagnosed with OAS. The mean age at onset was 6.74 years. OAS prevalence was 7.2% among children with allergic rhinitis (AR) and 19.1% among those with pollinosis, depending on comorbidity. OAS was more prevalent in schoolchildren with atopic dermatitis, food allergy, and sensitization to food allergens and grass pollen in early childhood. In schoolchildren with AR, only a history of food allergy until the age of 3 years increased the risk of OAS (aOR 2.971, 95% CI: 1.159-7.615). Food allergy and food sensitization in early childhood were associated with OAS in schoolchildren with AR. Further study is required to elucidate the mechanism by which food allergy in early childhood affects the development of OAS. © 2022 EAACI and John Wiley and Sons A/S. Published by John Wiley and Sons Ltd.

    Citation

    Kun-Baek Song, Min Jee Park, Eom Ji Choi, Sungsu Jung, Jisun Yoon, Hyun-Ju Cho, Bong-Seong Kim, Kangmo Ahn, Kyung Won Kim, Youn Ho Shin, Dong In Suh, Soo-Jong Hong, So-Yeon Lee. Food allergy in early childhood increases the risk of oral allergy syndrome in schoolchildren: A birth cohort study. Pediatric allergy and immunology : official publication of the European Society of Pediatric Allergy and Immunology. 2022 May;33(5):e13786

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    PMID: 35616894

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