Measures
Participants were asked to complete demographic details and information
about their anaphylaxis. These data were also extracted from their
clinical records and cross-checked with the self-report data. Severity
of anaphylaxis was rated by the allergy research nurse using the Brown
grading system20. Participants completed four
validated scales to assess QoL and mental health. These were the World
Health Organisation Quality of Life Scale, Brief version (WHOQoL
BREF)21 to measure generic QoL, the Anaphylaxis
Quality of Life Scale for adults (A-QoL-Adults)12 to
measure anaphylaxis specific QoL, the Hospital Anxiety and Depression
Scale (HADS)22 to measure anxiety and depression and
the Perceived Stress Scale (PSS)23 to measure stress.
All scales have excellent reliability and validity. Further details of
each scale can be found in the online supplement (S1).