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The Role of Haemoglobin A1c in Screening Obese Children and Adolescents for Glucose Intolerance and Type 2 Diabetes; O Papel da Hemoglobina A1c no Rastreio de Intolerância à Glicose e da Diabetes Tipo 2 em Crianças e Adolescentes Obesos

Galhardo, Júlia; Unidade de Endocrinologia Pediátrica e Diabetes. Hospital de Dona Estefânia. Centro Hospitalar de Lisboa Central. Lisboa. Portugal. Department of Clinical Sciences. Institute of Child Life & Health. University of Bristol. Bristol. Rein
Fonte: Ordem dos Médicos Publicador: Ordem dos Médicos
Tipo: info:eu-repo/semantics/article; article; info:eu-repo/semantics/publishedVersion Formato: application/pdf; application/pdf
Publicado em 30/06/2015 Português
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Introduction: In 2012, an international expert committee in diabetes wrote in favor of screening adult and paediatric patients for glucose intolerance and type 2 diabetes using glycated haemoglobin. The aim of this study was to evaluate glycated haemoglobin utility as a screening tool in a young obese mainly Caucasian population.Material and Methods: Children [(n = 266), body mass index z-score 3.35 ± 0.59, 90% Caucasian 90%, 55% female, median age 12.3 (range: 8.9 - 17.6) years old] recently referred to a tertiary hospital-based obesity clinic underwent a routine oral glicose tolerance test and glycated haemoglobin measurement. Exclusion criteria: abnormal forms of haemoglobin and conditions linked to increased erythrocyte turnover.Results: The oral glicose tolerance test diagnosed 13 (4.9%) subjects as prediabetic but none as diabetic. According to glycated haemoglobin, 32 would be prediabetic (29 false positives) and one would be diabetic (when he was only glucose intolerant). On the other hand, 10 prediabetic patients would not have been identified (false negatives). Glycated haemoglobin receiver operator characteristic analysis area under the curve was 0.59 (CI 95% 0.40 - 0.78), confirming its reduced capacity to identify prediabetes. Better results were achieved when calculating receiver operator characteristic analysis area under the curve for fasting glucose (0.76;CI 95% 0.66 - 0.87)...