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Inicio Allergologia et Immunopathologia Mould and grass pollen allergy as risk factors for childhood asthma in Zaragoza,...
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Vol. 44. Issue 5.
Pages 455-460 (September - October 2016)
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Vol. 44. Issue 5.
Pages 455-460 (September - October 2016)
Original Article
DOI: 10.1016/j.aller.2016.02.003
Mould and grass pollen allergy as risk factors for childhood asthma in Zaragoza, Spain
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N. Seguraa,b,
Corresponding author
nseguraa@gmail.com

Corresponding author.
, J. Fraja,b, J.L. Cuberoa,b, M.T. Sobrevíaa,b, A. Lezauna,b, L. Ferrera,b, A. Sebastiánc,b, C. Colása,b
a Allergy Department, University Hospital Lozano Blesa of Zaragoza, Avda. San Juan Bosco, 15, 50009 Zaragoza, Spain
b Aragon Health Research Institute (IIS Aragón), Centro de Investigación Biomédica de Aragón (CIBA), Avda. San Juan Bosco, 13, 50009 Zaragoza, Spain
c Pneumology Department, University Hospital Lozano Blesa of Zaragoza, Avda. San Juan Bosco, 15, 50009 Zaragoza, Spain
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Figures (1)
Tables (4)
Table 1. Characteristics of participating student population.
Table 2. Prevalence of asthma symptoms and associated risk factors.
Table 3. Skin tests in asthmatics. Relationship between the presence of asthma and positive skin tests.
Table 4. Multivariate logistic regression results.
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Abstract
Objective

Examine the prevalence of asthma and associated predictive factors in a group of 468 students.

Patients and methods

A descriptive, cross-sectional observational study in a randomly selected population of 468 children aged 10–12, in the city of Zaragoza. We used the ISAAC questionnaire on asthma completed by children under supervision of the investigators. We assessed the genetic risk (family history of asthma) and environmental risks. The risk for atopy was assessed by the presence of positive skin prick tests.

Results

25.3% of the children had symptoms consistent with asthma in the city of Zaragoza. Among them 33.1% reported a history of asthma in close relatives (OR=1.78, p<0.001). The history of hospitalisations for lower respiratory tract illness was strongly associated with the presence of asthma (OR=6.72, p<0.0001). Positive skin tests to Alternaria (OR=2.00, p<0.0001) and grass pollen (OR=1.76, p<0.001) were predictors of asthma. 63.6% of asthmatic children had presented clinical rhinitis in the previous 12 months, compared with 32% of non-asthmatics, and this difference was statistically significant (OR=3.89, p<0.0001). 47% of asthmatics presented with or previously had eczema, whereas only 26.9% of non-asthmatics presented with or previously had these types of lesions (p<0.0001).

Conclusion

The following are predictors of asthma: History of hospital admissions for lower respiratory tract illness, presence of rhinitis and/or eczema, positive prick test for certain aeroallergens, especially Alternaria and grass pollen, and family history of asthma.

Keywords:
ISAAC questionnaire
Asthma predictors
Childhood
Alternaria
Asthma epidemiology

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