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The introduction of solids in relation to asthma and eczema
A Zutavern1, E von Mutius, J Harris
1Dr von Haunersches Kinderspital (University Children's Hospital), Department of Occupational and Environmental Medicine, Imperial College of Science and Technology, National Heart and Lung Institute, London, UK. anne.zutavern@kk-i.med.uni-muenchen.de
Insights
Delayed introduction of solids does not prevent asthma or allergies in children. In fact, delaying egg and milk introduction may increase eczema risk, contradicting current feeding guidelines.
Area of Science:
- Pediatric Allergy and Immunology
- Nutritional Science
- Public Health
Background:
- Current feeding guidelines suggest delaying solid food introduction to prevent childhood asthma and allergies.
- This recommendation is based on limited scientific evidence.
Purpose of the Study:
- To investigate if the late introduction of solid foods offers protection against the development of asthma, eczema, and atopy in children.
- To evaluate the association between the timing of solid food introduction and the incidence of allergic diseases.
Main Methods:
- A prospective cohort study followed 642 children from birth to 5.5 years of age.
- Introduction of solids was assessed retrospectively at age 1 year.
- Outcomes included doctor-diagnosed eczema, atopy (via skin prick tests), preschool wheezing, and transient wheezing, all assessed at age 5-5.5 years.
Main Results:
- No protective effect of late solid introduction was found for preschool wheezing, transient wheezing, atopy, or eczema.
- Late introduction of egg and milk was significantly associated with an increased risk of eczema.
- Late egg introduction showed a non-significant trend towards increased risk of preschool wheezing.
Conclusions:
- The study findings do not support current feeding guidelines recommending delayed solid introduction for allergy prevention.
- Evidence suggests that delaying certain solids like egg and milk might increase the risk of eczema.
- Further research is needed to clarify optimal infant feeding practices for allergy prevention.
Background:
Despite scarce scientific evidence, current feeding guidelines recommend delayed introduction of solids for the prevention of asthma and allergy.
Aims:
To explore whether late introduction of solids is protective against the development of asthma, eczema, and atopy.
Methods:
A total of 642 children were recruited before birth and followed to the age of 5(1/2) years. Main outcome measures were: doctor's diagnosis of eczema ever, atopy according to skin prick test results against inhalant allergens, preschool wheezing, transient wheezing, all defined at age 5-5(1/2) years. Introduction of solids as main exposure measure was assessed retrospectively at age 1 year.
Results:
There was no evidence for a protective effect of late introduction of solids for the development of preschool wheezing, transient wheezing, atopy, or eczema. On the contrary, there was a statistically significant increased risk of eczema in relation to late introduction of egg (aOR 1.6, 95% CI 1.1 to 2.4) and milk (aOR 1.7, 95% CI 1.1 to 2.5). Late introduction of egg was furthermore associated with a non-significant increased risk of preschool wheezing (aOR 1.5, 95% CI 0.92 to 2.4). There was no statistical evidence of feeding practices playing a different role in the development of asthma and eczema after stratification for parental asthma and atopy status.
Conclusions:
Results do not support the recommendations given by present feeding guidelines stating that a delayed introduction of solids is protective against the development of asthma and allergy.
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