Peanut allergy in Mexican children: what is the effect of age at first consumption?

Area of Science:

• Pediatric Allergy and Immunology
• Clinical Nutrition
• Epidemiology of Allergic Diseases

Background:

• Early introduction of solid foods is linked to increased food allergy risk in children.
• Peanut allergy is a common and potentially severe childhood allergic condition.
• Understanding the timing of peanut introduction is crucial for allergy prevention strategies.

Purpose of the Study:

• To investigate the association between the age of peanut introduction and the development of peanut allergy.
• To identify risk factors for peanut allergy in children with existing allergic conditions.
• To evaluate the impact of early versus late peanut consumption on allergy development.

Main Methods:

• Prospective study involving 300 children with allergic rhinitis and asthma.
• Data collection included clinical history, peanut skin tests, parental interviews on eating habits, and open oral food challenges (OOFC).
• Statistical analysis, including multivariate analysis, was used to determine risk factors for peanut allergy.

Main Results:

• The median age of first peanut exposure was significantly higher in children with peanut allergies (2 years) compared to those without (1 year).
• Late introduction of peanuts (after age ≥2 years) was identified as a significant risk factor for developing peanut allergy (OR=8.0, p=0.026).
• Children subjected to OOFC with a history of allergy or positive skin test showed a clear link between late consumption and allergy.

Conclusions:

• Late introduction of peanuts to a child's diet increases the risk of developing a peanut allergy.
• Early exposure to peanuts may play a protective role in preventing peanut allergy.
• These findings have implications for infant feeding guidelines and allergy prevention.