Abstract
A retrospective survey of a family history of allergy employing a special questionnaire for children was performed. The survey included 1-year-old (n = 267) and 6-year-old children (n = 410) with allergies as well as 1-year-old (n = 313) and 6-year-old children (n = 329) without allergies. An 'Allergy Risk Score' (ARS) for each subject was calculated according to the history of allergy in three family members: father, mother and a sibling. Each family member was scored as 2.0 (overt history of allergies), 1.0 (provable), 0.5 (possible) or 0 (absent), and the ARS of the subjects was calculated as the total of the family members' scores. The ARS of children in the allergy groups was statistically higher than that of the control groups in both age groups. The ARS increased with an increase in the odds ratio (an approximate value of the risk), especially in 6-year-old children. An ARS calculated on the basis of family history could be a useful and practical index for estimating the risk of allergy development in children, and may be helpful in predicting and preventing allergies in infants and children.
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