Probable food allergy was defined as those with reported doctor diagnosed food allergy, symptoms of food allergy as well as reported sensitization to the food they reported symptoms from.
Líklegt fæðuofnæmi var skilgreint hjá þeim sem sögðust vera með fyrrgreind atriði en auk þess með næmingu fyrir sömu fæðu og þeir töldu sig hafa ofnæmi gegn.