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Risk factors for severe reactions in food allergy: Rapid evidence review with meta-analysis

  • the Global Allergy, Asthma European Network (GA2LEN) Food Allergy Guideline Group
  • Imperial College London
  • IRCCS Ospedale pediatrico Bambino Gesù - Roma
  • Clinic for Dermatology and Allergology, Kantonsspital St Gallen, St Gallen, Switzerland
  • University of Zurich
  • Université de Lille
  • Food Allergy Canada
  • University of Southern Denmark
  • Azienda Ospedaliera di Padova
  • Evidence Centre
  • Charité – Universitätsmedizin Berlin
  • University Hospital Southampton NHS Foundation Trust
  • Isle of Wight NHS Trust

Research output: Contribution to journalReview articleAcademicpeer-review

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Abstract

This rapid review summarizes the most up to date evidence about the risk factors for severe food-induced allergic reactions. We searched three bibliographic databases for studies published between January 2010 and August 2021. We included 88 studies and synthesized the evidence narratively, undertaking meta-analysis where appropriate. Significant uncertainties remain with respect to the prediction of severe reactions, both anaphylaxis and/or severe anaphylaxis refractory to treatment. Prior anaphylaxis, an asthma diagnosis, IgE sensitization or basophil activation tests are not good predictors. Some molecular allergology markers may be helpful. Hospital presentations for anaphylaxis are highest in young children, yet this age group appears at lower risk of severe outcomes. Risk of severe outcomes is greatest in adolescence and young adulthood, but the contribution of risk taking behaviour in contributing to severe outcomes is unclear. Evidence for an impact of cofactors on severity is lacking, although food-dependent exercise-induced anaphylaxis may be an exception. Some medications such as beta-blockers or ACE inhibitors may increase severity, but appear less important than age as a factor in life-threatening reactions. The relationship between dose of exposure and severity is unclear. Delays in symptom recognition and anaphylaxis treatment have been associated with more severe outcomes. An absence of prior anaphylaxis does not exclude its future risk.
Original languageEnglish
Pages (from-to)2634-2652
Number of pages19
JournalAllergy: European Journal of Allergy and Clinical Immunology
Volume77
Issue number9
Early online date2022
DOIs
Publication statusPublished - Sept 2022

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 3 - Good Health and Well-being
    SDG 3 Good Health and Well-being

Keywords

  • anaphylaxis
  • biomarkers
  • food allergy
  • risk assessment
  • severity

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