Study design
DBPCFC, allergy, Allergy
ALLERGY, ALLERGY, EGG ALLERGY
The BAT 2 Study (NCT03309488) was a cross‐sectional diagnostic study in which children with suspected IgE‐mediated allergy to either cow's milk, egg, sesame or cashew nut were prospectively recruited from specialised tertiary Paediatric Allergy clinics in London to undergo a diagnostic work‐up to confirm or refute the diagnosis. The present manuscript reports results for the egg study according to the STARD guidelines. Participants were referred by many different clinicians working in Paediatric Allergy specialist clinics at the Evelina London Children's Hospital or private clinics in London, and a screening telephone visit was undertaken by the study team to confirm eligibility. Children assessed for possible egg allergy were submitted to DBPCFC to BE and, if they passed this, to DBPCFC to LCE. Participants' parents or carers completed food frequency questionnaires (FFQ) and 7‐day food diaries, and children underwent clinical evaluation, SPT, sIgE testing to allergen extracts and to allergen components, BAT and OFC. All study participants had DBPCFC, except for infants younger than 12 months who had open OFC. After completion of the DBPCFC, participants' parents or carers filled in FFQ to egg every 2 months for 2 years.