Variables
The study analysed data regarding atopic history, previous reactions, co-factors, symptoms, severity and timing of reaction, emergency treatment and long-term management. Variables were reported as a fraction of valid answer options, with multiple selections possible for some questions. All variables except for age at reaction, gender and symptoms were allowed to remain missing by item, therefore the denominator used to calculate percentages did slightly vary from the total for some variables. Specific areas covered and the online version can be accessed through www.anaphylaxie.net.