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2016 FI

© Thomson Reuters, Journal Citation Reports, 2016

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  • Impact Factor: 1.439 (2016)
  • CiteScore 2017: 1.24
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  • SCImago Journal Rank (SJR):0,504
  • Source Normalized Impact per Paper (SNIP):0,791

© Thomson Reuters, Journal Citation Reports, 2017

Allergol Immunopathol (Madr) 2018;46:31-8 - DOI: 10.1016/j.aller.2017.01.010
Original Article
A rural environment does not protect against asthma or other allergic diseases amongst Mexican children
M. Bedolla-Barajasa,, , F. Javier Ramírez-Cervantesb, J. Morales-Romeroc, J. Jesús Pérez-Molinad, C. Meza-Lópezd, N. Delgado-Figueroad
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, Guadalajara, Jalisco C.P. 44340, Mexico
b Centro Universitario de los Altos, Universidad de Guadalajara, Carretera a Yahualica km. 7.5, Tepatitlán de Morelos, Jalisco C.P. 47630, Mexico
c Instituto de Salud Pública, Universidad Veracruzana, Av. Luis Castelazo Ayala s/n., Colonia Industrial Ánimas, Xalapa, Veracruz C.P. 91190, Mexico
d División de Pediatría, Hospital Civil de Guadalajara “Dr. Juan I. Menchaca”, Salvador de Quevedo y Zubieta No. 750, Colonia La Perla, Guadalajara, Jalisco C.P. 44340, Mexico
Received 19 December 2016, Accepted 24 January 2017

The commonly held notion that a rural environment decreases the frequency of allergic diseases has proven to be inconsistent amongst children.


Our objective was to contrast the prevalence of bronchial asthma (BA), allergic rhinitis (AR), and atopic dermatitis (AD) between children that live in a rural environment and those that live in urban areas.


We carried out a cross-sectional study amongst children aged six to seven; they were selected through probabilistic, stratified and conglomerated sampling. The prevalence of BA, AR, and AD was identified with the use of the questionnaire provided by The International Study of Asthma and Allergies in Childhood, additionally, we inquired about each child's family history of atopy, their exposure to farm animals, the intake of unpasteurised cow's milk, and the number of siblings related to every child. We used logistic regression and multivariate analysis to determine the correlation between asthma, allergic diseases, and rural environment.


We included 189/1003 (18.8%) children from a rural environment, and 814/1003 (81.2%) from an urban area. BA and AR were associated to a family history of atopy (OR=2.15, p=0.001; OR=2.58, p=0.002, respectively). BA was more prevalent in males (OR=1.92, p=0.007). Notably, a higher number of siblings seems to protect against AR (OR=0.45, p=0.008). A paternal history of allergies was associated to AD.


In our study, we were unable to find protective factors in a rural environment that might decrease the prevalence of asthma or allergic diseases.

Asthma, Children, Allergic diseases, Rural, Urban
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