Pediatric Allergy Testing: At What Age Is It Worth It?

Area of Science:

• Pediatric Allergy and Immunology
• Otolaryngology
• Diagnostic Accuracy

Background:

• Concordance between allergic rhinitis symptoms and allergy testing is variable in young children.
• Serum specific IgE testing's clinical utility for diagnosing allergic rhinitis is influenced by age-related reactivity rates.

Purpose of the Study:

• To determine the age at which serum specific IgE testing becomes clinically useful for diagnosing allergic rhinitis in pediatric patients.
• To evaluate the age-dependent reliability of allergy testing in children with allergic rhinitis symptoms.

Main Methods:

• Retrospective chart review of 606 pediatric patients (0-18 years) with allergic rhinitis symptoms.
• Standardized serum specific IgE testing panel analyzed for aeroallergen sensitivities.
• Demographic data including age and sex collected; testing results interpreted binarily.

Main Results:

• Children under 3 years old had a 93.6% rate of negative allergy test results, compared to 49.0% in those 3 years and older.
• Pediatric patients under 3 years old showed significantly increased odds (15.1 times) of negative allergy testing.
• Positive allergy tests in patients aged 3 and older showed increased odds of polysensitization (≥4 allergens) with advancing age.

Conclusions:

• Allergy testing results in early childhood are not highly predictive of allergic rhinitis symptoms.
• The reliability and concordance of allergy testing increase with age, becoming more dependable by age 3.
• Avoid allergy testing in children under 3 years old to promote cost-effective diagnosis of allergic rhinitis.