title: Prevalence and factors associated to peanut allergy in Mexican school children.
abstract: BACKGROUND
  In our country, the prevalence and the factors associated to peanut allergy are unknown, a health problem that has been emerging worldwide.
  
  
  OBJECTIVE
  To establish the prevalence and the factors that are associated to peanut allergy amongst school children.
  
  
  METHODS
  This is a population-based cross-sectional study. We included 756 children aged 6-7 years. The children's parents were questioned about their peanut intake habits. A structured questionnaire was applied, it included questions regarding peanut intake; family and personal history of asthma; rhinitis; and atopic dermatitis. Allergic reactions to peanuts were registered as: probable, convincing and systematic. The statistical analyses included logistical regression models to look for associated factors.
  
  
  RESULTS
  Males were 356/756 (47.1%). Peanut allergy prevalence: probable reaction: 14/756 (1.8%), convincing reaction: 8/756 (1.1%) and systemic reaction: 3/756 (0.4%). Through multivariate analysis, the presence of symptoms of allergic rhinitis (OR=4.2 95% CI 1.3-13.2) and atopic dermatitis (OR=5.2; 95% CI 1.4-19.5) during the previous year, showed significant association to probable peanut reaction. The former year, the presence of atopic dermatitis was the only variable that was substantially associated to a convincing reaction (OR=7.5; 95% CI 1.4-38.4) and to a systematic reaction (OR=45.1; 95% CI 4.0-510.0), respectively.
  
  
  CONCLUSIONS
  The reported prevalence of peanut allergy was consistent with that found in previous studies; symptoms of allergic rhinitis and atopic dermatitis were identified as associated factors to peanut allergy.
authors.affiliation: Servicio de Alergia e Inmunología Clínica, Nuevo Hospital Civil de Guadalajara "Dr. Juan I. Menchaca", Salvador de Quevedo y Zubieta No. 750, Colonia La Perla, Guadalajara, Jalisco, C.P. 44340, Mexico. Electronic address: drmbedbar@gmail.com.
authors.forename: M
authors.initials: M
authors.lastname: Bedolla-Barajas
authors.affiliation: Servicio de Alergología e Inmunología Clínica, Hospital Civil de Guadalajara "Fray Antonio Alcalde", Coronel Calderón No. 777, Colonia El Retiro, Guadalajara, Jalisco, C.P. 44280, Mexico.
authors.forename: F
authors.initials: F
authors.lastname: Valdez-López
authors.affiliation: Servicio de Alergología e Inmunología Clínica, Hospital Civil de Guadalajara "Fray Antonio Alcalde", Coronel Calderón No. 777, Colonia El Retiro, Guadalajara, Jalisco, C.P. 44280, Mexico; Centro Universitario en Ciencias de la Salud, Universidad de Guadalajara, Sierra Mojada No. 950, Colonia Independencia Oriente, Guadalajara, Jalisco, C.P. 44340, Mexico.
authors.forename: G
authors.initials: G
authors.lastname: Alcalá-Padilla
authors.affiliation: Centro Universitario en Ciencias de la Salud, Universidad de Guadalajara, Sierra Mojada No. 950, Colonia Independencia Oriente, Guadalajara, Jalisco, C.P. 44340, Mexico.
authors.forename: T I
authors.initials: TI
authors.lastname: Bedolla-Pulido
authors.affiliation: Centro Universitario de la Cienega, Universisad de Guadalajara, Av. Universidad, Núm.1115, Lindavista, Ocotlán, Jalisco, C.P. 47820, Mexico.
authors.forename: V
authors.initials: V
authors.lastname: Rivera-Mejia
authors.affiliation: Instituto de Salud Pública, Universidad Veracruzana, Av. Luis Castelazo Ayala s/n., Colonia Industrial Ánimas, Xalapa, Veracruz, C.P. 91190, Mexico.
authors.forename: J
authors.initials: J
authors.lastname: Morales-Romero
mesh_terms: D000485:Allergens / Q000276:immunology; D010367:Arachis / Q000276:immunology; D002648:Child; D003430:Cross-Sectional Studies; D003876:Dermatitis, Atopic / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008297:Male; D008800:Mexico / Q000453:epidemiology; D021183:Peanut Hypersensitivity / Q000453:epidemiology*; D011153:Population; D015995:Prevalence; D012044:Regression Analysis; D065631:Rhinitis, Allergic / Q000453:epidemiology*; D012307:Risk Factors; D011795:Surveys and Questionnaires
chemical_list: D000485:Allergens
keywords: Children; Epidemiology; Food allergy; Peanut allergy; Prevalence