Tags

Type your tag names separated by a space and hit enter

Early allergen exposure, skin prick responses, and atopic wheeze at age 5 in English children: a cohort study.
Thorax 2004; 59(10):855-61T

Abstract

BACKGROUND

For many years it has been assumed that the risk of childhood respiratory allergies is related to allergen exposures in early life. There are, however, few prospective data in support. We aimed to examine this relationship in a representative cohort of children born in Ashford, Kent (UK).

METHODS

625 children (94% of those eligible) were followed from birth to the age of 5.5 years at which time 552 underwent skin prick testing to extracts of house dust mite and cat fur allergens. Maternal reports of wheeze in the last year were collected by interview. These outcomes were related to individual domestic concentrations of Der p 1 and Fel d I allergens estimated from dust collection at the age of 8 weeks.

RESULTS

10% of children were sensitised to house dust mite or cat at age 5.5 years; 7% had atopic wheeze. No significant relationships between allergen exposure and either sensitisation or wheeze were found but, on examination, the exposure-response relationships for both allergens and for each outcome rose steeply at low levels of exposure and were attenuated at high levels of exposure. These patterns were modified by paternal atopy and by birth order.

CONCLUSIONS

There are no linear relationships between early allergen exposure and the induction of childhood respiratory allergy; rather, the risks of IgE sensitisation and asthma rise at very low levels of exposure and are attenuated thereafter. These patterns are influenced by parental atopy and birth order. These findings suggest important gene-environment interactions in the development of atopy and asthma and imply that reductions in domestic allergen exposure alone are unlikely to have a major impact in decreasing the incidence of these diseases in childhood.

Authors+Show Affiliations

Department of Occupational and Environmental Medicine, Imperial College School of Medicine at the National Heart and Lung Institute, Manresa Road, London SW3 6LR, UK. p.cullinan@ic.ac.ukNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15454651

Citation

Cullinan, P, et al. "Early Allergen Exposure, Skin Prick Responses, and Atopic Wheeze at Age 5 in English Children: a Cohort Study." Thorax, vol. 59, no. 10, 2004, pp. 855-61.
Cullinan P, MacNeill SJ, Harris JM, et al. Early allergen exposure, skin prick responses, and atopic wheeze at age 5 in English children: a cohort study. Thorax. 2004;59(10):855-61.
Cullinan, P., MacNeill, S. J., Harris, J. M., Moffat, S., White, C., Mills, P., & Newman Taylor, A. J. (2004). Early allergen exposure, skin prick responses, and atopic wheeze at age 5 in English children: a cohort study. Thorax, 59(10), pp. 855-61.
Cullinan P, et al. Early Allergen Exposure, Skin Prick Responses, and Atopic Wheeze at Age 5 in English Children: a Cohort Study. Thorax. 2004;59(10):855-61. PubMed PMID: 15454651.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Early allergen exposure, skin prick responses, and atopic wheeze at age 5 in English children: a cohort study. AU - Cullinan,P, AU - MacNeill,S J, AU - Harris,J M, AU - Moffat,S, AU - White,C, AU - Mills,P, AU - Newman Taylor,A J, PY - 2004/9/30/pubmed PY - 2004/10/29/medline PY - 2004/9/30/entrez SP - 855 EP - 61 JF - Thorax JO - Thorax VL - 59 IS - 10 N2 - BACKGROUND: For many years it has been assumed that the risk of childhood respiratory allergies is related to allergen exposures in early life. There are, however, few prospective data in support. We aimed to examine this relationship in a representative cohort of children born in Ashford, Kent (UK). METHODS: 625 children (94% of those eligible) were followed from birth to the age of 5.5 years at which time 552 underwent skin prick testing to extracts of house dust mite and cat fur allergens. Maternal reports of wheeze in the last year were collected by interview. These outcomes were related to individual domestic concentrations of Der p 1 and Fel d I allergens estimated from dust collection at the age of 8 weeks. RESULTS: 10% of children were sensitised to house dust mite or cat at age 5.5 years; 7% had atopic wheeze. No significant relationships between allergen exposure and either sensitisation or wheeze were found but, on examination, the exposure-response relationships for both allergens and for each outcome rose steeply at low levels of exposure and were attenuated at high levels of exposure. These patterns were modified by paternal atopy and by birth order. CONCLUSIONS: There are no linear relationships between early allergen exposure and the induction of childhood respiratory allergy; rather, the risks of IgE sensitisation and asthma rise at very low levels of exposure and are attenuated thereafter. These patterns are influenced by parental atopy and birth order. These findings suggest important gene-environment interactions in the development of atopy and asthma and imply that reductions in domestic allergen exposure alone are unlikely to have a major impact in decreasing the incidence of these diseases in childhood. SN - 0040-6376 UR - https://www.unboundmedicine.com/medline/citation/15454651/Early_allergen_exposure_skin_prick_responses_and_atopic_wheeze_at_age_5_in_English_children:_a_cohort_study_ L2 - http://thorax.bmj.com/cgi/pmidlookup?view=long&pmid=15454651 DB - PRIME DP - Unbound Medicine ER -