New validated recipes for double-blind placebo-controlled low-dose food challenges
Article first published online: 16 APR 2013
© 2013 John Wiley & Sons A/S. Published by Blackwell Publishing Ltd
Pediatric Allergy and Immunology
Volume 24, Issue 3, pages 282–287, May 2013
How to Cite
New validated recipes for double-blind placebo-controlled low-dose food challenges. Pediatr Allergy Immunol 2013:24: 282–287., , , , , , .
- Issue published online: 16 APR 2013
- Article first published online: 16 APR 2013
- Manuscript Accepted: 11 FEB 2013
- double-blind placebo-controlled food challenges;
- food allergy;
- food hypersensitivity;
- triangle test;
- validated recipes
Double-blind placebo-controlled food challenges are considered the most reliable method to diagnose or rule out food allergy. Despite this, there are few validated challenge recipes available. The present study aimed to validate new recipes for low-dose double-blind placebo-controlled food challenges in school children, by investigating whether there were any sensory differences between the active materials containing cow's milk, hen's egg, soy, wheat or cod, and the placebo materials. The challenge materials contained the same hypoallergenic amino acid–based product, with or without added food allergens. The test panels consisted of 275 school children, aged 8–10 and 14–15 yr, respectively, from five Swedish schools. Each participant tested at least one recipe. Standardized blinded triangle tests were performed to investigate whether any sensory differences could be detected between the active and placebo materials. In our final recipes, no significant differences could be detected between the active and placebo materials for any challenge food (p > 0.05). These results remained after stratification for age and gender. The taste of challenge materials was acceptable, and no unfavourable side effects related to test materials were observed. In summary, these new validated recipes for low-dose double-blinded food challenges contain common allergenic foods in childhood; cow's milk, hen's egg, soy, wheat and cod. All test materials contain the same liquid vehicle, which facilitates preparation and dosing. Our validated recipes increase the range of available recipes, and as they are easily prepared and dosed, they may facilitate the use of double-blind placebo-controlled food challenges in daily clinical practice.