Food allergy (FA) represents an increasing social and economic health problem. Prevalence of food allergy differs from one country to another depending on genetic and environmental as well as feeding habits of each country. Estimate the prevalence of confirmed immunoglobulin E-mediated food allergy (FA) among adult Egyptian patients and identify its possible risk factors. A total of 2081 adult subjects were randomly selected from the Allergy outpatient clinic at Ain Shams university hospitals. Patients who disclosed food adverse complaints (probable food allergy group) were further subjected to a detailed questionnaire, complete blood cell count, total immunoglobulin E level, skin prick test and /or specific immunoglobulin E test for common food allergens, and oral food challenge with the culprit food. Patients were classified into confirmed food allergy and no food allergy groups depending on the results of oral food challenge test. Out of the 2081 adults, 100 subjects had self-reported food adverse complaints, and of them, 45 (45%) had confirmed diagnosis of FA. Thirty four (75.6%) confirmed FA patients were females with mean age ± SD of (38.02 ± 13.08) years, five patients (11.1%) had persistent childhood FA, 11 (24.4 %) had family history of atopy, five (11.1%) had associated atopic diseases and 24 (53.3%) were polysensitized. Female gender, young age and exercise were found to be risk factors for confirmed FA (OR: 1.766, 1.4, and 1.9 respectively). Cutaneous manifestations were the most common presentation of confirmed FA patients in the form of urticaria 40/45 (88.9%) and angioedema 18/45 (40%). The most common food allergen was milk, banana, fish, tomato, strawberry and eggs. In conclusion, IgE mediated food allergy is a noticeable health problem among adult Egyptians, particularly adult females and young age groups.
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