PMID- 33972923 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20210513 IS - 2219-2808 (Print) IS - 2219-2808 (Electronic) IS - 2219-2808 (Linking) VI - 10 IP - 3 DP - 2021 May 9 TI - Repetitiveness of the oral glucose tolerance test in children and adolescents. PG - 29-39 LID - 10.5409/wjcp.v10.i3.29 [doi] AB - BACKGROUND: Data regarding the most suitable diagnostic method for the diagnosis of glucose impairment in asymptomatic children and adolescents are inconclusive. Furthermore, limited data are available on the reproducibility of the oral glucose tolerance test (OGTT) in children and adolescents who are obese (OB). AIM: To investigate the usefulness of the OGTT as a screening method for glucose dysregulation in children and adolescents. METHODS: Eighty-one children and adolescents, 41 females, either overweight (OW), OB or normal weight (NW) but with a strong positive family history of type 2 diabetes mellitus (T2DM), were enrolled in the present observational study from the Outpatient Clinic of Paediatric Endocrinology of the University Hospital of Patras in Greece. One or two 3-h OGTTs were performed and glucose, insulin and C-peptide concentrations were measured at several time points (t = 0 min, t = 15 min, t = 30 min, t = 60 min, t = 90 min, t = 120 min, t = 180 min). RESULTS: Good repetitiveness was observed in the OGTT response with regard to T2DM, while low repetitiveness was noted in the OGTT response with regard to impaired glucose tolerance (IGT) and no repetitiveness with regard to impaired fasting glucose (IFG). In addition, no concordance was observed between IFG and IGT. During the 1(st) and 2(nd) OGTTs, no significant difference was found in the glucose concentrations between NW, OW and OB patients, whereas insulin and C-peptide concentrations were higher in OW and OB compared to NW patients at several time points during the OGTTs. Also, OW and OB patients showed a worsening insulin and C-peptide response during the 2(nd) OGTT as compared to the 1(st) OGTT. CONCLUSION: In mild or moderate disorders of glucose metabolism, such as IFG and IGT, a diagnosis may not be reached using only one OGTT, and a second test or additional investigations may be needed. When glucose metabolism is profoundly impaired, as in T2DM, one OGTT is probably more reliable and adequate for establishing the diagnosis. Excessive weight and/or a positive family history of T2DM possibly affect the insulin and C-peptide response in the OGTT from a young age. CI - (c)The Author(s) 2021. Published by Baishideng Publishing Group Inc. All rights reserved. FAU - Kostopoulou, Eirini AU - Kostopoulou E AD - Division of Paediatric Endocrinology and Diabetes, Department of Paediatrics, University of Patras School of Medicine, Patras 26504, Greece. irekost@upatras.gr. FAU - Skiadopoulos, Spyridon AU - Skiadopoulos S AD - Department of Medical Physics, School of Medicine, University of Patras, Patras 26504, Greece. FAU - Partsalaki, Ioanna AU - Partsalaki I AD - Division of Paediatric Endocrinology and Diabetes, Department of Paediatrics, University of Patras School of Medicine, Patras 26504, Greece. FAU - Rojas Gil, Andrea Paola AU - Rojas Gil AP AD - Department of Nursing, University of Peloponnese, Tripolis 22100, Greece. FAU - Spiliotis, Bessie E AU - Spiliotis BE AD - Division of Paediatric Endocrinology and Diabetes, Department of Paediatrics, University of Patras School of Medicine, Patras 26504, Greece. LA - eng PT - Journal Article DEP - 20210509 PL - United States TA - World J Clin Pediatr JT - World journal of clinical pediatrics JID - 101627548 PMC - PMC8085718 OTO - NOTNLM OT - Adolescents OT - Children OT - Impaired fasting glucose OT - Impaired glucose tolerance OT - Obesity OT - Oral glucose tolerance test COIS- Conflict-of-interest statement: The authors have no conflicts of interest to report. EDAT- 2021/05/12 06:00 MHDA- 2021/05/12 06:01 PMCR- 2021/05/09 CRDT- 2021/05/11 06:36 PHST- 2020/12/25 00:00 [received] PHST- 2021/01/25 00:00 [revised] PHST- 2021/03/07 00:00 [accepted] PHST- 2021/05/11 06:36 [entrez] PHST- 2021/05/12 06:00 [pubmed] PHST- 2021/05/12 06:01 [medline] PHST- 2021/05/09 00:00 [pmc-release] AID - 10.5409/wjcp.v10.i3.29 [doi] PST - epublish SO - World J Clin Pediatr. 2021 May 9;10(3):29-39. doi: 10.5409/wjcp.v10.i3.29. eCollection 2021 May 9.