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Goh SH, Yap GC, Cheng HY, Chiang WC, Soh JY, Chong KW, Goh A, Tham EH, Tyebally A, Ganapathy S, Ibrahim I, Lee BW. Trends in Childhood Anaphylaxis in Singapore: 2015-2022. Clin Exp Allergy 2024; 54:585-595. [PMID: 38923779 DOI: 10.1111/cea.14528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 06/12/2024] [Accepted: 06/13/2024] [Indexed: 06/28/2024]
Abstract
BACKGROUND There has been limited data regarding the incidence of anaphylaxis in Asia. We aim to describe patterns in patient characteristics, triggers and clinical presentation of childhood anaphylaxis in Singapore. METHODS This was a retrospective review of emergency electronic medical records of children with anaphylaxis. Patients with the allergy-related diagnoses of anaphylaxis, angioedema, allergy and urticaria based on ICD-9 codes were screened. Cases fulfilling the World Allergy Organization criteria for anaphylaxis were included. RESULTS A total of 1188 cases of anaphylaxis were identified with a median age of 6.3 years. Extrapolating data from the study sites, from 2015 to 2022, the incidence rate of childhood anaphylaxis emergency visits in Singapore doubled from 18.9 to 38.8 per 100,000 person-years, with an incidence rate ratio (IRR) of 2.06 (95% confidence interval [CI] 1.70-2.49). In 2022, the incidence rate of food anaphylaxis was 30.1 per 100,000 person-years, IRR 2.39 (95% CI 1.90-3.01) and drug anaphylaxis was 4.6 per 100,000 person-years, IRR 1.89 (95% CI 1.11-3.25). The incidence rate in children aged 0-4 years quadrupled during the study period. Common triggers were egg (10.4%), peanut (9.3%), tree nut (8.8%), milk (8%), shellfish (7.8%) and non-steroidal anti-inflammatory drug (4.4%). The majority (88.6%) of patients were treated with intramuscular adrenaline. Total number of allergy-related visits did not increase over time between 2015 and 2019. Rates of severe anaphylaxis, namely anaphylactic shock and admission to high-dependency and intensive care, did not increase over time, with a mean incidence of 1.6, IRR 0.85 (95% CI 0.40-1.83) and 0.7, IRR 1.77 (95% CI 0.54-5.76) per 100,000 person-years, respectively. CONCLUSION While the number of emergency visits due to childhood anaphylaxis has increased, the number of cases of allergy-related visits, anaphylactic shock and anaphylaxis requiring high-dependency and intensive care did not rise.
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Affiliation(s)
- Si Hui Goh
- Allergy Service, Department of Paediatrics, KK Women's and Children's Hospital, Singapore, Singapore
| | - Gaik Chin Yap
- Department of Paediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Hsin Yue Cheng
- Department of Paediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Wen Chin Chiang
- Allergy Service, Department of Paediatrics, KK Women's and Children's Hospital, Singapore, Singapore
| | - Jian Yi Soh
- Department of Paediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Khoo Teck Puat-National University Children's Medical Institute, National University Hospital, National University Health System, Singapore, Singapore
| | - Kok Wee Chong
- Allergy Service, Department of Paediatrics, KK Women's and Children's Hospital, Singapore, Singapore
| | - Anne Goh
- Allergy Service, Department of Paediatrics, KK Women's and Children's Hospital, Singapore, Singapore
| | - Elizabeth Huiwen Tham
- Department of Paediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Khoo Teck Puat-National University Children's Medical Institute, National University Hospital, National University Health System, Singapore, Singapore
| | - Arif Tyebally
- Department of Emergency Medicine, KK Woman's and Children's Hospital, Singapore, Singapore
| | - Sashikumar Ganapathy
- Department of Emergency Medicine, KK Woman's and Children's Hospital, Singapore, Singapore
| | - Irwani Ibrahim
- Emergency Medicine Department, National University Hospital and Department of Surgery, National University Health Systems, Singapore, Singapore
| | - Bee Wah Lee
- Department of Paediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
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Yu J, Lanoue D, Mir A, Kaouache M, Bretholz A, Clarke A, McCusker C, Protudjer JLP, Jones A, Ben-Shoshan M. Trends of Peanut-Induced Anaphylaxis Rates Before and After the 2017 Early Peanut Introduction Guidelines in Montreal, Canada. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY. IN PRACTICE 2024:S2213-2198(24)00626-3. [PMID: 38876271 DOI: 10.1016/j.jaip.2024.06.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 05/15/2024] [Accepted: 06/03/2024] [Indexed: 06/16/2024]
Abstract
BACKGROUND Food allergies, particularly peanut, represent the predominant cause of anaphylaxis. Whereas early allergen introduction has emerged as a potential preventive strategy, the precise impact of recent guidelines on peanut-induced anaphylaxis rates in Canada remains unclear. OBJECTIVE To assess the impact of the 2017 Addendum Guidelines for the Prevention of Peanut Allergy on peanut-induced anaphylaxis rates in Canada. METHODS Using a comprehensive longitudinal registry capturing pediatric anaphylaxis presentations to the Montreal's Children's Hospital, we compared children with and without known peanut allergy who presented with peanut-induced anaphylaxis between 2011 and 2019 inclusive, excluding data beyond 2019 owing to the Coronavirus disease 2019 (COVID-19) pandemic. We calculated rates of peanut-induced anaphylaxis presentations per 100,000 age-adjusted all-cause emergency department visits using 4-month intervals. Interrupted time series analysis was used to compare anaphylaxis rate trends before and after 2017 for children ages 0 to 2 and 3 to 17 years. RESULTS We examined 2,011 cases of pediatric anaphylaxis, including 429 (21%) triggered by peanuts. Compared with pre-guideline estimates, the yearly rate of change of peanut anaphylaxis rates decreased by 7.96 (95% confidence interval -14.57 to -1.36; P = .018) after 2017 among patients with new-onset anaphylaxis in children 2 years of age or younger (n = 109). No significant changes were identified for older patients ages 3 to 17, or in patients with known peanut allergy. CONCLUSIONS Early introduction guidelines in Canada are associated with a reduced risk of new-onset peanut-induced anaphylaxis in young children within a single center in Montreal. Further research is required to assess the impact on a wider population and other food allergens.
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Affiliation(s)
- Joshua Yu
- Department of Medicine, Faculty of Medicine, McMaster University, Hamilton, Ont, Canada.
| | - Derek Lanoue
- Division of Allergy and Clinical Immunology, Montreal General Hospital, McGill University Health Centre, Montreal, Quebec, Canada
| | - Adhora Mir
- Department of Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Ont, Canada
| | - Mohammed Kaouache
- The Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - Adam Bretholz
- Division of Pediatric Emergency Medicine, Department of Pediatrics, Montreal Children's Hospital, Montreal, Quebec, Canada
| | - Ann Clarke
- Division of Rheumatology, Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alta, Canada
| | - Christine McCusker
- The Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - Jennifer L P Protudjer
- Department of Pediatrics and Child Health, Max Rady College of Medicine; and Children's Hospital Research Institute of Manitoba, Winnipeg, Man, Canada
| | - Aaron Jones
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ont, Canada
| | - Moshe Ben-Shoshan
- The Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
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Chow SJ, McWilliam V, Koplin JJ, Perrett KP. Australian Infant Food Allergy Emergency Presentations Following Updated Early Food Introduction Guidelines. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY. IN PRACTICE 2023; 11:3473-3477. [PMID: 37479113 DOI: 10.1016/j.jaip.2023.07.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 07/07/2023] [Accepted: 07/12/2023] [Indexed: 07/23/2023]
Abstract
BACKGROUND The Australasian Society of Clinical Immunology and Allergy food allergy prevention guidelines were updated in 2016 to recommend home introduction of allergenic foods actively in the first year of life, including to infants at high risk of allergy. An important consideration for parents and providers is whether this practice increases food allergy reactions or anaphylaxis. OBJECTIVE We aimed to determine whether the 2016 update of food allergy prevention guidelines was associated with an increase in food allergy or anaphylaxis emergency department (ED) presentations. METHODS We obtained hospital electronic medical records for infants aged 4 to 12 months who attended the Royal Children's Hospital Melbourne ED in 2015 or in 2018 with a presenting problem or an encounter diagnosis of food allergy or anaphylaxis. RESULTS Emergency department presentations owing to food allergy increased from 1.0% (95% CI, 0.85-1.23) in 2015 to 1.4% (95% CI, 1.22-1.67) in 2018 (P = .006). There was no increase in the number of anaphylaxis presentations (28 in 2015 and 22 in 2018) or peanut anaphylaxis presentations (three in 2015 and three in 2018). Overall, the proportion of food allergy presentations attributed to IgE-mediated food allergy was similar (82.1% in 2015 and 84.1% in 2018), whereas peanut allergy presentations increased slightly, although not statically significantly, from 14.6% to 21.2% (P = .09). Food protein-induced enterocolitis syndrome ED presentations were five in 2015 (4.3%) and 12 in 2018(7.6%), although not statistically significant (P = .25). CONCLUSIONS Changes to food allergy prevention guidelines recommending the earlier introduction of allergenic food may have led to a small increase in ED presentations for food allergy but not anaphylaxis.
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Affiliation(s)
- Sing-Jill Chow
- Population Allergy Research Group, Murdoch Children's Research Institute, Parkville, Victoria, Australia; Department of Allergy and Immunology, Royal Children's Hospital, Parkville, Victoria, Australia
| | - Vicki McWilliam
- Population Allergy Research Group, Murdoch Children's Research Institute, Parkville, Victoria, Australia; Department of Allergy and Immunology, Royal Children's Hospital, Parkville, Victoria, Australia; Centre for Food and Allergy Research, Murdoch Children's Research Institute, Parkville, Victoria, Australia; Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia
| | - Jennifer J Koplin
- Population Allergy Research Group, Murdoch Children's Research Institute, Parkville, Victoria, Australia; Centre for Food and Allergy Research, Murdoch Children's Research Institute, Parkville, Victoria, Australia; Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia; Child Health Research Centre, University of Queensland, Brisbane, Queensland, Australia
| | - Kirsten P Perrett
- Population Allergy Research Group, Murdoch Children's Research Institute, Parkville, Victoria, Australia; Department of Allergy and Immunology, Royal Children's Hospital, Parkville, Victoria, Australia; Centre for Food and Allergy Research, Murdoch Children's Research Institute, Parkville, Victoria, Australia; Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia.
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Warren C, Nimmagadda SR. LEAPing into the void: Implementing population-level food allergy prevention by means of early introduction of allergenic solids. Ann Allergy Asthma Immunol 2023; 130:267-268. [PMID: 36868722 DOI: 10.1016/j.anai.2022.12.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 12/02/2022] [Accepted: 12/09/2022] [Indexed: 03/05/2023]
Affiliation(s)
- Christopher Warren
- Center for Food Allergy and Asthma Research, Department of Preventive Medicine, Northwestern University, Feinberg School of Medicine, Chicago, Illinois.
| | - Sai R Nimmagadda
- Center for Food Allergy and Asthma Research, Department of Preventive Medicine, Northwestern University, Feinberg School of Medicine, Chicago, Illinois; Center for Food Allergy and Asthma Research, Division of Allergy and Immunology, Ann and Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois
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Koplin JJ, McWilliam V, Soriano VX, Peters RL. Early peanut introduction: To test or not to test? Ann Allergy Asthma Immunol 2023; 130:565-570. [PMID: 36791959 DOI: 10.1016/j.anai.2023.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 01/30/2023] [Accepted: 02/06/2023] [Indexed: 02/15/2023]
Abstract
OBJECTIVE To review recent evidence and international guidelines on early peanut introduction for preventing peanut allergy and provide an update on the status of the debate around testing before early peanut introduction. DATA SOURCES Review of published literature documenting: infant feeding guidelines; impact of early peanut introduction on peanut allergy; risk factors for peanut allergy; and impact of early peanut introduction guidelines on infant feeding practices and allergy. STUDY SELECTION We used a narrative approach and present both pro and con arguments for testing before peanut introduction. Data from randomized controlled trials and post-hoc analyses of these trials and observational studies were included. RESULTS Allergy prevention guidelines around the world now consistently recommend introducing peanut into an infant's diet before 12 months of age for countries with high peanut allergy prevalence. In the US, guidelines recently shifted away from recommending allergy testing before introduction for those at risk of peanut allergy. There is evidence primarily from Australia that recommending early introduction without prior testing is safe and effective in increasing early peanut introduction for both high and low-risk infants, although the subsequent reduction in peanut allergy prevalence at the population level was less than expected. CONCLUSION Current evidence supports recommending early peanut introduction without routinely testing for peanut allergy. If testing is offered, this should be based on shared decision making between families and practitioners and only be undertaken where there is provision for rapid access to definitive diagnosis including oral food challenges.
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Affiliation(s)
- Jennifer J Koplin
- Murdoch Children's Research Institute, Melbourne, Victoria, Australia; Child Health Research Centre, University of Queensland, Brisbane, Queensland, Australia.
| | - Vicki McWilliam
- Murdoch Children's Research Institute, Melbourne, Victoria, Australia; Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia; Department of Allergy and Immunology, Royal Children's Hospital, Parkville, Victoria, Australia
| | | | - Rachel L Peters
- Murdoch Children's Research Institute, Melbourne, Victoria, Australia; Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia.
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