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Effects of pets on asthma development up to 8 years of age: the PIAMA study.
Allergy. 2009 Aug; 64(8):1202-8.A

Abstract

BACKGROUND

Recall bias may provide discrepant relationships of pet exposure with sensitization and asthma development. We studied prospectively effects of pets at home on development of sensitization, asthma and respiratory symptoms from birth up to age 8 years.

METHODS

Event history analysis was performed on annually registered data of 2951 children, participating in the PIAMA birth cohort study.

RESULTS

Children with a cat or dog at home at 3 months of age had a significantly lower prevalence of sensitization to inhalant allergens at age 8, but not of asthma. A cat decreased the risk of house dust mite sensitization at age 8 [odds ratio (OR) = 0.68, 95% confidence interval (CI) 0.49-0.95], a dog of pollen sensitization (OR = 0.49, 95% CI: 0.29-0.83). A cat or dog at home did not significantly affect asthma incidence in each subsequent year. From 2 years of age onwards, the incidence of wheeze (OR = 1.52, 95% CI: 1.12-2.05) and a dry cough at night (OR = 1.28, 95% CI: 1.05-1.57) was higher in children with a dog, whereas removal of a dog increased the risk of developing asthma symptoms. Comparing analyses using prospectively and retrospectively collected data on diagnosed asthma showed important recall bias.

CONCLUSIONS

Our prospective study shows a protective effect of early presence of pets at home on sensitization to inhalant allergens, but no prevention of asthma development. Furthermore, children with pets had more frequent transient or intermittent asthma symptoms. Parental report of asthma by recall may provide spurious results of these associations.

Authors+Show Affiliations

Department of Epidemiology, University Medical Center Groningen, University of Groningen, PO Box 30.001, Groningen 9700 RB, The Netherlands.No affiliation info availableNo affiliation info availableNo 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

19245426

Citation

Kerkhof, M, et al. "Effects of Pets On Asthma Development Up to 8 Years of Age: the PIAMA Study." Allergy, vol. 64, no. 8, 2009, pp. 1202-8.
Kerkhof M, Wijga AH, Brunekreef B, et al. Effects of pets on asthma development up to 8 years of age: the PIAMA study. Allergy. 2009;64(8):1202-8.
Kerkhof, M., Wijga, A. H., Brunekreef, B., Smit, H. A., de Jongste, J. C., Aalberse, R. C., Hoekstra, M. O., Gerritsen, J., & Postma, D. S. (2009). Effects of pets on asthma development up to 8 years of age: the PIAMA study. Allergy, 64(8), 1202-8. https://doi.org/10.1111/j.1398-9995.2009.02016.x
Kerkhof M, et al. Effects of Pets On Asthma Development Up to 8 Years of Age: the PIAMA Study. Allergy. 2009;64(8):1202-8. PubMed PMID: 19245426.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of pets on asthma development up to 8 years of age: the PIAMA study. AU - Kerkhof,M, AU - Wijga,A H, AU - Brunekreef,B, AU - Smit,H A, AU - de Jongste,J C, AU - Aalberse,R C, AU - Hoekstra,M O, AU - Gerritsen,J, AU - Postma,D S, Y1 - 2009/02/24/ PY - 2009/2/28/entrez PY - 2009/2/28/pubmed PY - 2009/10/23/medline SP - 1202 EP - 8 JF - Allergy JO - Allergy VL - 64 IS - 8 N2 - BACKGROUND: Recall bias may provide discrepant relationships of pet exposure with sensitization and asthma development. We studied prospectively effects of pets at home on development of sensitization, asthma and respiratory symptoms from birth up to age 8 years. METHODS: Event history analysis was performed on annually registered data of 2951 children, participating in the PIAMA birth cohort study. RESULTS: Children with a cat or dog at home at 3 months of age had a significantly lower prevalence of sensitization to inhalant allergens at age 8, but not of asthma. A cat decreased the risk of house dust mite sensitization at age 8 [odds ratio (OR) = 0.68, 95% confidence interval (CI) 0.49-0.95], a dog of pollen sensitization (OR = 0.49, 95% CI: 0.29-0.83). A cat or dog at home did not significantly affect asthma incidence in each subsequent year. From 2 years of age onwards, the incidence of wheeze (OR = 1.52, 95% CI: 1.12-2.05) and a dry cough at night (OR = 1.28, 95% CI: 1.05-1.57) was higher in children with a dog, whereas removal of a dog increased the risk of developing asthma symptoms. Comparing analyses using prospectively and retrospectively collected data on diagnosed asthma showed important recall bias. CONCLUSIONS: Our prospective study shows a protective effect of early presence of pets at home on sensitization to inhalant allergens, but no prevention of asthma development. Furthermore, children with pets had more frequent transient or intermittent asthma symptoms. Parental report of asthma by recall may provide spurious results of these associations. SN - 1398-9995 UR - https://www.unboundmedicine.com/medline/citation/19245426/Effects_of_pets_on_asthma_development_up_to_8_years_of_age:_the_PIAMA_study_ L2 - https://doi.org/10.1111/j.1398-9995.2009.02016.x DB - PRIME DP - Unbound Medicine ER -