Prevalence of allergen sensitization detected by patch tests

Area of Science:

• Dermatology
• Allergology
• Epidemiology

Background:

• Existing literature on allergen prevalence primarily comes from academic dermatology centers.
• Data from diverse practice settings, including allergists, is crucial for accurate contact allergy prevalence.
• Assessing varied data sources can reveal underreported prevalence rates.

Purpose of the Study:

• To determine contact allergy prevalence by comparing positive patch test reaction rates.
• To evaluate common contact allergen reaction rates across three distinct practice settings.
• To identify potential underreporting of allergy prevalence in academic literature.

Main Methods:

• Retrospective analysis of patch test results from an academic center and a national contact allergen database.
• Inclusion of data from a third academic group sourced from published literature.
• Logistic regression analysis to compare positive reaction rates for common allergens across the three groups.

Main Results:

• Significantly higher positive reaction rates (p < 0.05) were observed for 10 of 36 allergens in the national contact allergen database compared to academic groups.
• This indicates a potential underestimation of allergen prevalence in academic-derived data.
• The findings highlight differences in reported reaction rates based on practice setting.

Conclusions:

• Positive reaction rates to common allergens in patch testing might be underreported in scientific literature.
• The study's retrospective nature and differing date ranges were noted limitations.
• Further research is needed to fully understand allergen prevalence across diverse clinical settings.