Allergic (atopic) march (click here to enlarge the image).
This Swedish study analysed early risk factors and protective factors for allergic rhinitis at preschool age (4 years) via questionnaires.
At 4½ yr of age, 5.5% of children had reported symptoms of allergic rhinitis.
Risk factors for allergic rhinitis were:
- allergic sensitisation to food allergens at 4½ yr (OR 10.21)
- recurrent wheeze at 4½ yr (3.33)
- doctor-diagnosed eczema at 4½ yr (2.72)
- parental rhinitis (2.21)
- eczema first year (1.97)
- male gender (1.82)
The risk was reduced with fish introduction before 9 months of age (0.49).
References:
Alm B, Goksör E, Thengilsdottir H, Pettersson R, Möllborg P, Norvenius G, Erdes L, Åberg N, Wennergren G. Early protective and risk factors for allergic rhinitis at age 4½ yr. Pediatr Allergy Immunol 2011: Doi: 10.1111/j.1399-3038.2011.01153.x
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