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Vol. 46. Issue 5.
Pages 431-437 (September - October 2018)
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Vol. 46. Issue 5.
Pages 431-437 (September - October 2018)
Original Article
DOI: 10.1016/j.aller.2017.09.032
Exposure to dogs but not cats is associated to a decrease in the prevalence in atopic dermatitis amongst school-children
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M. Bedolla-Barajasa,
Corresponding author
drmbedbar@gmail.com

Corresponding author.
, J. Morales-Romerob, T.I. Bedolla-Pulidoc, T.R. Bedolla-Pulidoa, C. Meza-Lópezd, N.A. Pulido-Guilléne
a Servicio de Alergia e Inmunología Clínica, Hospital Civil de Guadalajara “Dr. Juan I. Menchaca”, Salvador de Quevedo y Zubieta No. 750, Colonia La Perla, C.P. 44340, Guadalajara, Jalisco, Mexico
b Instituto de Salud Pública, Universidad Veracruzana, Av. Luis Castelazo Ayala s/n., Colonia Industrial Ánimas, C.P. 91190, Xalapa, Veracruz, Mexico
c Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara. Sierra Mojada No. 950, Colonia Independencia Oriente, C.P. 44340, Guadalajara, Jalisco, Mexico
d División de Pediatría, Hospital Civil de Guadalajara “Dr. Juan I. Menchaca”, Salvador de Quevedo y Zubieta No. 750, Colonia La Perla, C.P. 44340, Guadalajara, Jalisco, Mexico
e Psicología Clínica, Eulogio Parra No. 2330-301, Col. Las Américas, C.P. 44650, Guadalajara, Jalisco, Mexico
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Figures (1)
Tables (5)
Table 1. Characteristics of study population.
Table 2. Association between outdoor cats and dogs to the prevalence of allergic diseases and their symptoms.
Table 3. Association between indoor cats and dogs to the prevalence of allergic diseases and their symptoms.
Table 4. Association between exposure to an outdoor dog during the first year of life and the prevalence of atopic dermatitis.
Table 5. Association between exposure to an indoor dog during the first year of life and the prevalence of atopic dermatitis.
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Abstract
Introduction

The association regarding the exposure to pets, especially cats and dogs, and the prevalence of allergic diseases is inconsistent.

Objective

We analyzed the role played by early exposure to dogs or cats in the prevalence of allergic diseases amongst school-aged children.

Method

Through a cross-sectional study, we examined 756 children, aged 6–7; these candidates were selected through cluster sampling. We inquired about the exposure that these children had had to dogs and cats, and whether these pets spent most of their time indoors or outdoors during the first year of the child's life. In order to identify the prevalence of allergic diseases and their symptoms, each child's parent completed the International Study of Asthma and Allergies in Childhood questionnaire.

Results

Exposure to outdoor dogs was associated to nocturnal coughing, odds ratio (OR) 0.64, with a confidence interval of 95% (95% CI) 0.43–0.95 and with atopic dermatitis (OR: 0.39; 95% CI: 0.20–0.76). Interestingly, exposure to outdoor cats was associated to nocturnal coughing (OR: 0.51; 95% CI: 0.32–0.83) and current rhinitis symptoms (OR: 0.59; 95% CI 0.36–0.97). After carrying out the multivariate analyses, only exposure to dogs, both indoor and outdoor, was significantly associated to a decrease in the prevalence of atopic dermatitis OR 0.40 (95% CI: 0.20–0.79) and OR 0.38 (95% CI: 0.18–0.83), respectively.

Conclusion

Our findings suggest that exposure to dogs, whether they be indoor or outdoor pets, is associated to a decreased prevalence in atopic dermatitis.

Keywords:
Pets
Atopic dermatitis
Asthma
Allergic rhinitis
Dogs
Cats

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