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Comparative evaluation of RAST and FAST for 11 allergens in 288 patients.

J L Gueant1, D A Moneret-Vautrin, G Dejardin

  • 1Médecine D, Immuno-Allergie, CHU de Brabois, Unité INSERM U 308, Faculté de Médecine, Vandoeuvre les Nancy, France.

Allergy
|April 1, 1989
PubMed
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The Phadebas RAST and IgE-FAST methods showed similar specific IgE results in most allergy patients. RAST demonstrated higher sensitivity, particularly when test results differed, aiding in accurate allergy diagnosis.

Area of Science:

  • Allergy and Immunology
  • Diagnostic Methods
  • Clinical Chemistry

Background:

  • Specific IgE antibody testing is crucial for diagnosing allergic diseases.
  • Comparing different diagnostic assays is essential for clinical utility.
  • The Phadebas RAST and IgE-FAST are methods for quantifying specific IgE.

Purpose of the Study:

  • To compare the agreement between Phadebas RAST and IgE-FAST for 11 allergens.
  • To evaluate the concordance of these methods with clinical data and skin tests.
  • To determine the sensitivity and reliability of each assay.

Main Methods:

  • Specific IgE levels were measured in 288 patients using both Phadebas RAST and IgE-FAST.
  • Agreement was assessed based on class differences between the two methods.

Related Experiment Videos

  • Results were retrospectively compared with clinical information and skin prick test outcomes.

    • Main Results:

    • Overall agreement between RAST and FAST was 78.7%.
    • Best agreement was noted for Phleum pratense, egg white, corn, Betula verrucosa, and cat epithelium.
    • When results differed, RAST aligned better with skin tests (93.5%) than FAST (51.6%).

    Conclusions:

    • Phadebas RAST and IgE-FAST yield comparable results in most cases.
    • RAST exhibits superior sensitivity compared to FAST, especially in discordant results.
    • These findings support the use of RAST for more sensitive allergy diagnostics.