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Low prevalence of glucose intolerance in racially mixed children with cystic fibrosis
Author(s) -
Alves Crésio,
Lima Daniela S,
Cardeal Mauricio,
Santana Angelica
Publication year - 2010
Publication title -
pediatric diabetes
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.678
H-Index - 75
eISSN - 1399-5448
pISSN - 1399-543X
DOI - 10.1111/j.1399-5448.2010.00639.x
Subject(s) - medicine , cystic fibrosis , glycated hemoglobin , population , endocrinology , gastroenterology , insulin resistance , insulin , diabetes mellitus , type 2 diabetes , environmental health
Alves C, Lima DS, Cardeal M, Santana A. Low prevalence of glucose intolerance in racially mixed children with cystic fibrosis. Objective: To evaluate glucose tolerance in racially mixed Brazilian youth with cystic fibrosis (CF). Methods: Cross‐sectional study conducted between August and September 2007, at a reference service for CF, evaluating: glycated hemoglobin (HbA1c), blood glucose, and insulin levels, before and 2 h after a glucose overload. Results: There were 46 patients aged between 6 yr and 16 yr and 2 months (median: 9 yr and 10 months) of whom 64% were boys. Of these, 26% were Whites; 54.4% Mulattoes; and 19.6% Blacks. HbA1c was normal in all patients. Only one participant (12‐yr old) had glucose intolerance. Insulin levels ranged from 1 to 23 µIU/mL (median: 4.5 µIU/mL) at baseline and from 3.2 to 192.1 µIU/mL (median: 11 µIU/mL) after a glucose overload. Insulin resistance evaluated by the HOMA index, stratified by sex and age, was present in three patients. The ΔF508 mutation was present in only 4.3% of the sample, all of them being heterozygous. Conclusions: The low prevalence of carbohydrate intolerance in this population is probably a result of their young age. Another possibility is the low frequency of the ΔF508 mutation. Although not conclusive, these data suggest that in addition to age, the genotype:phenotype ratio may influence the development of glucose intolerance in patients with CF.