The Risk of Recurrent Anaphylaxis

Area of Science:

• Pediatric Allergy and Immunology
• Emergency Medicine
• Clinical Epidemiology

Background:

• Anaphylaxis recurrence in children poses significant health risks.
• Understanding recurrence rates and associated factors is crucial for effective management.
• Previous studies have not fully elucidated recurrence patterns in medically attended pediatric anaphylaxis.

Purpose of the Study:

• To determine the annual recurrence rate of anaphylaxis in children treated in emergency departments.
• To evaluate prehospital and emergency department management of recurrent anaphylaxis.
• To identify factors associated with recurrent anaphylaxis in pediatric patients.

Main Methods:

• Prospective cohort study within the Cross-Canada Anaphylaxis Registry.
• Inclusion of children with medically attended anaphylaxis from 3 emergency departments and emergency medical services.
• Annual follow-up questionnaires and Cox regression analysis to identify recurrence predictors.

Main Results:

• A yearly anaphylaxis recurrence rate of 17.6% was observed in children.
• Food was the trigger in 84.6% of recurrent episodes; epinephrine was used in 66.2% of cases.
• Asthma, food triggers, and epinephrine use during the initial event increased recurrence odds, while peanut triggers decreased them.

Conclusions:

• The study identifies a significant yearly recurrence rate of anaphylaxis in children.
• There is a notable underuse of epinephrine in managing anaphylaxis.
• Educational initiatives are essential to improve avoidance strategies and promote timely epinephrine administration.