Incidence of fatal food anaphylaxis in people with food allergy: a systematic review and meta-analysis Thisanayagam Umasunthar clinical research fellow1,2, Jo Leonardi-Bee, associate professor in epidemiology3, Matthew Hodes, senior lecturer in child and adolescent psychiatry 2,4, Paul J. Turner, clinical lecturer in paediatric allergy1,2, Claudia Gore, consultant in paediatric allergy1,2, Parviz Habibi, consultant in paediatric respiratory medicine1,2, John O. Warner professor of paediatrics1,2, Robert J. Boyle, senior lecturer in paediatric allergy1,2 1Department of Paediatrics, Imperial College London, Norfolk Place,London W2 1PG UK 2 Imperial College Healthcare NHS Trust, St Mary's Hospital, Praed Street, London W2 1NY UK 3 Division of Epidemiology and Public Health, University of Nottingham NG5 1PB UK 4 Academic Unit of Child and Adolescent Psychiatry, Imperial College London, Norfolk Place, London W2 1PG UK Address for Correspondence: Robert Boyle Wright Fleming Building Norfolk Place London W2 1PG Tel: +44 207 594 3990 Fax: +44 207 594 3984. Email: r.boyle@nhs.net Medline Search strategy 1. exp Anaphylaxis/ 2. anaphyl*.mp. [mp=title, abstract, original title, name of substance word, subject heading word, protocol supplementary concept, rare disease supplementary concept, unique identifier] 3. exp Food Hypersensitivity/ 4. Food/ 5. food*.mp. [mp=title, abstract, original title, name of substance word, subject heading word, protocol supplementary concept, rare disease supplementary concept, unique identifier] 6. 1 or 2 7. 3 or 4 or 5 8. 6 and 7 9. exp Emergency Medical Services/ 10. emergency department.mp. [mp=title, abstract, original title, name of substance word, subject heading word, protocol supplementary concept, rare disease supplementary concept, unique identifier] 11. Emergencies/ 12. exp Hospitalization/ 13. hospital admission*.mp. [mp=title, abstract, original title, name of substance word, subject heading word, protocol supplementary concept, rare disease supplementary concept, unique identifier] 14. Patient Admission/ 15. exp Fatal Outcome/ 16. fatal*.mp. [mp=title, abstract, original title, name of substance word, subject heading word, protocol supplementary concept, rare disease supplementary concept, unique identifier] 17. exp Mortality/ 18. incidence.mp. or Incidence/ 19. prevalence.mp. or Prevalence/ 20. 9 or 10 or 11 21. 12 or 13 or 14 22. 15 or 16 or 17 23. 18 or 19 24. 8 and 20 25. 8 and 21 26. 8 and 22 27. 8 and 23 28. 24 or 25 or 26 or 27 Potentially eligible studies with no episodes of fatal food anaphylaxis recorded 1. Bohlke K, Davis RL, DeStefano F, Marcy SM, Braun MM, Thompson RS. Epidemiology of anaphylaxis among children and adolescents enrolled in a health maintenance organization. J Allergy Clin Immunol. 2004;113(3):536-42. 2. Braganza SC, Acworth JP, Mckinnon DRL, Peake JE, Brown AFT. Paediatric emergency department anaphylaxis: different patterns from adults. Arch Dis Child. 2006;91(2):159-63. 3. Decker WW, Campbell RL, Manivannan V, Luke A, St Sauver JL, Weaver A, et al. The etiology and incidence of anaphylaxis in Rochester, Minnesota: a report from the Rochester Epidemiology Project. J Allergy Clin Immunol. 2008;122(6):11615. 4. Helbling A, Hurni T, Mueller UR, Pichler WJ. Incidence of anaphylaxis with circulatory symptoms: a study over a 3-year period comprising 940 000 inhabitants of the Swiss Canton Bern. Clin Exp Allergy. 2004;34(2):285-90. 5. Harduar-Morano L, Simon MR, Watkins S, Blackmore C. A population-based epidemiologic study of emergency department visits for anaphylaxis in Florida. J Allergy Clin Immunol. 2011;128(3):594-600.e1. 6. Tejedor M, Moro M, Mugica M, Esteban J, Gomez-Traseira C, Remedios C, et al. Incidence of anaphylaxis in Alcorcon city, Spain: A population-based study. Allergy. 2011;66:110. 7. Vetander M, Helander D, Flodstrom C, Ostblom E, Alfven T, Ly DH, et al. Anaphylaxis and reactions to foods in children - a population-based case study of emergency department visits. Clin Exp Allergy. 2012;42(4):568-77. 8. Peng MM, Jick H. A Population-Based Study of the Incidence, Cause, and Severity of Anaphylaxis in the United Kingdom. Arch Intern Med. 2004;164(3):317-9. 9. Ross MP, Ferguson M, Street D, Klontz K, Schroeder T, Luccioli S. Analysis of food-allergic and anaphylactic events in the National Electronic Injury Surveillance System. J Allergy Clin Immunol. 2008;121(1):166-71. 10. Yocum MW, Butterfield JH, Klein JS, Volcheck GW, Schroeder DR, Silverstein MD. Epidemiology of anaphylaxis in Olmsted County: A population-based study. J Allergy Clin Immunol. 1999;104(2):452-6. 11. Mulla ZD. Hospitalizations of children and young adults from peanut-induced anaphylaxis in Texas. South Med J. 2011;104(5):322-4. Epub 2011/05/25. 12. Mulla ZD, Simon MR. Hospitalizations for anaphylaxis in Florida: epidemiologic analysis of a population-based dataset. Int Arch Allergy Immunol. 2007;144(2):128-36. Epub 2007/05/31. 13. Ho MHK, Wong LM, Ling SC, Kwok KL, Lee KP, Hui J, et al. Clinical characteristics and etiologies of severe systemic allergic reaction amongst children admitting to hospital authority paediatric service. Hong Kong Journal of Paediatrics. 2009;14 (4):297. 14. Gonzalez-Perez A, Aponte Z, Vidaurre CF, Rodriguez LAG. Anaphylaxis epidemiology in patients with and patients without asthma: A United Kingdom database review. J Allergy Clin Immunol. 2010;125(5):1098-104.