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Pediatr Allergy Immunol ; 25(7): 699-705, 2014 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-25348132

RESUMO

BACKGROUND: Obese children and adolescents have an increased risk for asthma. A few studies have evaluated the association of insulin resistance and asthma in obese pediatric populations. We examined whether there was a relationship between high degrees of insulin resistance and the presence of asthma in obese children and adolescents. METHODS: A total of 153 patients aged 4-15 years with at or above the 95th percentile BMI for age were prospectively recruited. Assessments included diagnosis of asthma, skin prick test reactivity to common environmental aeroallergens, and HOMA estimated insulin resistance, with the median (2.22) used as a cutoff value to categorize insulin resistance. RESULTS: There were 56 (36.6%) asthmatic and 97 (63.4%) non-asthmatic patients. HOMA values were significantly associated with positive skin tests (p = 0.008) and allergic asthma diagnosis (p = 0.016). Baseline insulin value was significantly associated with the risk of presenting asthma with positive skin testing (odds ratio 1.084, p = 0.037). Differences in age, BMI, and waist circumference were found between the groups of HOMA-IR <2.22 and ≥2.22. Waist circumference (WC) was significantly associated with FVC (p = 0.0001) and FEV1 (p < 0.0003); the greater the WC, the lower FVC and FEV1 values. CONCLUSIONS: Insulin resistance is a risk for allergic asthma in obese children and adolescents. Waist circumference was related to CVF and FEV1 impairment.


Assuntos
Asma/epidemiologia , Resistência à Insulina , Obesidade/epidemiologia , Adolescente , Poluentes Atmosféricos/imunologia , Alérgenos/imunologia , Índice de Massa Corporal , Criança , Pré-Escolar , Feminino , Humanos , Masculino , Estudos Prospectivos , Testes Cutâneos , Espirometria
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