EPAP, Interviewstudy

Recruiting

• Conditions: Food Allergy; Allergy; Anaphylactic Shock; Food Allergy Peanut

• Registration Number: NCT06192914
• Lead Sponsor: Charite University, Berlin, Germany

Brief Summary

The goal of this observational study is to learn about repetitive anaphylactic reactions in food allergic patients and to compare the frequency of repetitive reactions between different elicitors in food allergic patients. The main question it aims to answer are:

• Is there an elicitor specific difference in the occurrence of anaphylactic reactions once the elicitor has been identified and the patient received counselling about its avoidance?

Participants will answer questionnaires via a link they will receive via e-mail at baseline and 3, 6, 12 and 24 months after inclusion in the study.

Detailed Description

The aim of the study is to establish a cohort of patients who were included in the anaphylaxis registry with an anaphylactic reaction to legumes, tree nuts, seeds, grains or pseudocereals within the previous twelve months. Patients are requested to provide information about the occurrence of new allergic reactions at defined time-points over a period of two years (at baseline, 3, 6, 12, and 24 months). In addition, their eating behavior and the food allergy-specific quality of life will be captured. The investigators intend to track self-management in dealing with anaphylaxis, especially the use of emergency medication. It is examined whether patients react again and whether these are reactions to a known or previously unknown allergen to the patient. By recording the symptoms, it will be checked whether there are certain reaction patterns to specific foods or whether these are patient specific. In addition, the influence of the previous anaphylactic reaction and knowledge of the existing allergy on quality of life, dietary behavior and the ability to use emergency medication should be examined.

This is intended to help improve the care for future patients in order to minimize the risk of repeat reactions.

Study Timeline

• Study Start: 2022-03-01
• Study First Submitted: 2023-12-11
• Study First Submitted QC: 2023-12-20
• Study First Posted: 2024-01-05
• Status Verified: 2025-02
• Last Update Submitted: 2025-02-11
• Last Update Posted: 2025-02-13
• Primary Completion: 2029-02-28
• Study Completion: 2029-02-28

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 322

Inclusion Criteria

• anaphylactic reaction to peanuts, other legumes, tree nuts, seeds (e.g. sesame seed, sunflower seed), cereals (e.g. wheat, oat) or pseudocereals (e.g. quinoa)
• participation in the European Anaphylaxis Registry (Clinical Trials Identifier: NCT05210543)
• possibility and consent to receive links to the follow-up electronic surveys via e-mail and fill out the questionnaires electronically

Exclusion Criteria

• if inclusion criteria are fulfilled there are no further exclusion criteria

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Frequency of allergic reactions in tree nut and peanut allergic patients within the observation period of the study	2 years	The aim is to identify whether the frequency of allergic reactions after the identification of the elicitor of the initial allergic reaction differs between peanuts and tree nuts

Secondary Outcome Measures

Name	Time	Method
Use of emergency medication during a repetitive reaction	2 years	The prescripton of emergency medications and the instruction about their use enables patients or their relatives to take care of the primary treatment of anaphylactic reactions. The investigators want to compare whether the use of emergency medication during subsequent anaphylactic reactions increases. Patients are requested to provide details about the use of emergency medication for each allergic reaction they report via the study period.
Use of adrenaline as first line treatment	2 years	The instruction about adrenaline autoinjectors and their use as first line treatment in case of an allergic reaction increases the frequency of its use. The investigators want to compare whether the use of adrenaline as a first line treatment during subsequent anaphylactic reactions increases. Patients are requested to provide details about the use of adrenaline for each allergic reaction they report via the study period.
Frequency of allergic reactions among patients with different food allergens within the observation period of the study	2 years	The aim is to identify whether the frequency of allergic reactions after the identification of the elicitor of the initial allergic reaction differs between different food allergens
The association of food allergy related quality of life, measured via the Food Allergy Quality of Life Questionnaire, with repetitive allergic reactions	2 years	An anaphylactic reaction to food can impact quality of life. The investigators want to observe the food allergy related quality of life over the study period and examine whether the existence of repetitive reaction influences quality of life. Food allergy related quality of life is measured via the Food Allergy Quality of Life Questionnaire (FAQLQ). Patients can achieve 1 - 7 points, where a higher score represents a higher impairment of quality of life and 1 point represents no impairment.
The association of eating habits (e.g. frequency of eating out) and the occurrence of repetitive allergic reactions	2 years	An anaphylactic reaction to food can influence eating habits and specific eating habits can be related to more frequent accidental allergic reactions. The investigators want to observe whether the eating habits differ between patients with and without recurrent allergic reactions.; The eating habits are captured with a non-validated questionnaire. Patient are requested to answer, whether they follow a specific diet (e.g. vegan, vegetarian, religious diets) and how often they use specific ways of eating out (e.g. in a restaurant or eating at a friends place). The eating habits are captured at every time point of the study (baseline, 3, 6, 12, 24 months).
The association of dietary counselling and successful allergen avoidance	2 years	The investigators hypothesize that dietary counselling enables patients to avoid their allergen effectively and reduces the number of allergic reactions compared to the time before dietary counselling. Patients are requested to provide the number of allergic reactions throughout the two years before inclusion in the study in the baseline questionnaire. This number will be compared with the number of reactions patients report during the study. The study inclusion always takes place in a specialized allergy center, where every patient receives counselling about allergen avoidance.

Trial Locations

Locations (1)

Charité - Universitätsmedizin Berlin; 🇩🇪 Berlin, Germany