Season of birth as predictor of atopic manifestations
a Department of Paediatrics,
University Hospital, Linköping, Sweden, b Department of
Paediatrics, Central Hospital, Skövde, Sweden, c Department of Paediatrics, Central
Hospital, Borås, Sweden
Correspondence to: Dr Lennart Nilsson, Department of Paediatrics, University Hospital, 581 85 Linköping, Sweden.
Accepted 8
November 1996
The relation between month of birth, sensitisation, and
manifestations of atopy was assessed in 209 children who were followed from birth to 12-15 years. Children born during the tree
pollen season were less likely to develop allergic
rhinoconjunctivitis, IgE antibodies to pollen, or a positive
screening test for IgE antibodies (odds ratio 0.28, 0.41, 0.35, respectively) than children born during the rest of the year. The
prevalence of IgE antibodies to food and animal dander at 9 months and
to atopic disease was higher in children born in the autumn and winter,
that is, September to February, compared to the spring and summer
(egg 20% v 6%; milk 10% v 2%). Thus
sensitisation to pollen and allergic rhinoconjunctivitis is least
common in children born in the spring, while birth in September to
February is associated with an increased incidence of sensitisation to
food and of atopic disease.
© 1997 by Archives of Disease in Childhood
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