Diagnostic Decision Point for IgE-Mediated Wheat Allergy in Children

Area of Science:

• Pediatric Allergy and Immunology
• Diagnostic Biomarkers
• Food Allergy Research

Background:

• Food allergies significantly impact children's health and quality of life.
• Oral food challenge (OFC) is the gold standard for diagnosis but is resource-intensive.
• Accurate and efficient diagnostic tools for food allergies, like wheat allergy (WA), are needed.

Purpose of the Study:

• To establish diagnostic decision points for wheat allergy (WA) in children aged 0-7 years.
• To evaluate the utility of wheat-specific immunoglobulin E (IgE) and ω-5 gliadin-specific IgE levels.
• To reduce reliance on OFC testing for WA diagnosis in Korean children.

Main Methods:

• A multicenter survey of 231 children aged 0-7 years was conducted between January 2018 and March 2022.
• Wheat allergy (WA) diagnosis was confirmed using OFC results and symptom assessment.
• Receiver operating characteristic (ROC) analysis was performed on wheat-specific IgE and ω-5 gliadin-specific IgE levels.

Main Results:

• Optimal cutoff values, positive, and negative decision points were determined for wheat-specific IgE (10.2, 33.5, 0.41 kU/L) and ω-5 gliadin-specific IgE (0.69, 3.88, 0.01 kU/L).
• No significant differences in age, sex, or allergic comorbidities were found between wheat allergy (WA) and non-wheat allergy (NWA) groups.
• The established IgE thresholds provide a basis for diagnosing WA.

Conclusions:

• The identified diagnostic decision points for wheat-specific IgE and ω-5 gliadin-specific IgE can aid in diagnosing wheat allergy (WA) in children.
• These decision points may help reduce the need for OFC testing, offering a more efficient diagnostic pathway.
• This study provides valuable data for diagnosing WA in the Korean pediatric population.