Article

A prospective study of Fel d1 and Der p1 exposure in infancy and childhood wheezing.

Unitat Recerca Respiratòria i Ambietal, Institut Municipal Investigació Mèdica, Barcelona, Spain.
American Journal of Respiratory and Critical Care Medicine (impact factor: 11.08). 09/2004; 170(3):273-8. DOI:10.1164/rccm.200310-1348OC
Source: PubMed

ABSTRACT The impact of domestic exposure to cat allergen (Fel d1) and house dust mite (Der p1) on wheezing from birth to the age of 4 years was investigated in a multicenter prospective birth cohort; 1,611 mothers were recruited before delivery in Ashford, England, and Barcelona and Menorca, Spain. Exposures were gathered via dust sample collection at children's home in their first year of life. Families provided complete outcome data (wheezing status in all 4 years) for 1,289 children. Domestic allergen levels varied substantially between centers. Six hundred three (47%) children never wheezed during their first 4 years of life. Der p1 did not correlate with any type of wheezing outcome. Fel d1 significantly increased the risk of wheezing in 3- and 4-year-olds in comparison to 1-year-olds. Distinct risk profiles were found for wheezing at different ages. Multivariate analysis revealed an interaction between Fel d1 and maternal asthma among children who wheeze in Year 4 (relative risk = 2.77; 95% confidence interval = 1.19-6.46). Our data support the idea that several patterns of wheezing with different risk profiles exist among young children. The effect of Fel d1 exposure varied according to age and maternal asthma.

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Keywords

1-year-olds
 
4 years
 
95% confidence interval
 
cat allergen
 
complete outcome data
 
data support
 
different risk profiles
 
Distinct risk profiles
 
Domestic allergen levels varied
 
domestic exposure
 
dust sample collection
 
Fel d1 exposure varied
 
first 4 years
 
first year
 
house dust mite
 
maternal asthma
 
multicenter prospective birth cohort
 
Multivariate analysis
 
relative risk
 
Year 4