Abstract
Patients with cystic fibrosis (CF) undergo a slow and progressive process toward diabetes. Oral glucose tolerance test (OGTT) is recommended to diagnose impaired glucose levels in these patients. Continuous glucose monitoring (CGM) measures glucose profiles under real-life conditions.To compare OGTT and CGM results in CF patients.Paired OGTT and 6-day CGM profiles (146.2 ± 9.1 h/patient) were performed in 30 CF patients aged 10–18 years.According to OGTT, 14 patients had normal glucose tolerance (NGT), 14 abnormal glucose tolerance (AGT), and two cystic fibrosis-related diabetes (CFRD). In 27 patients (13 NGT, 13 AGT, 1 CFRD), CGM showed glucose values ranging from 140 to 200 mg/dL during similar monitoring times (2%–14% with NGT, 1%–16.9% with AGT, and 3% with CFRD). Glucose peak levels ≥200 mg/dL were seen in seven patients (3 NGT, 3 AGT, 1 CFRD).According to CGM, two patients had all glucose values under 140 mg/dL (1 NGT, 1 AGT). Seventeen patients had glucose levels ranging from 140 to 200 mg/dL (10 NGT, 6 AGT, 1 CFRD). Ten patients (3 NGT, 7 AGT) had glucose values ≥200 mg/dL for ≤1% of the monitoring time and one (CFRD) for >1% of the monitoring time.OGTT results did not agree with those of the CGM. CGM allows for diagnosis of glucose changes not detected by OGTT. Such changes may contribute to optimize pre-diabetes management in CF patients.Los pacientes con fibrosis quística (FQ) evolucionan lenta y progresivamente hacia la diabetes, siendo el test de tolerancia oral a la glucosa (TTOG) el método utilizado para diagnosticar sus alteraciones glucémicas. La monitorización continua de glucosa (MCG) proporciona perfiles de glucosa en condiciones de vida habituales del paciente.Comparar los resultados del TTOG y de la MCG en pacientes con FQ.TTOG seguido de MCG (146,2 ± 9,1 h/paciente) en 30 pacientes con FQ (10-18 años de edad).Según el TTOG, 14 pacientes presentaron tolerancia normal a la glucosa (TNG), 14 tolerancia anormal a la glucosa (TAG) y 2 diabetes relacionada con la fibrosis quística (DRFQ). En 27 pacientes (13 con TNG, 13 con TAG, uno con DRFQ) la MCG mostró valores de glucosa 140-200 mg/dL durante periodos similares de tiempo (2-14%, 1-16,9% y 3%, respectivamente). Picos de glucosa ≥ 200 mg/dL se observaron en 7 pacientes (3 con TNG, 3 con TAG y uno con DRFQ).Según la MCG, 2 pacientes tuvieron todos los valores de glucosa <140 mg/dL (uno con TNG y otro con TAG); 17 pacientes entre 140-200 mg/dL (10 con TNG, 6 con TAG y uno con DRFQ); 10 pacientes ≥ 200 mg/dL durante ≤ 1% del tiempo valorado (3 con NGT, 7 con TAG) y uno ≥ 200 mg/dL durante > 1% del tiempo valorado (con DRFQ).Los resultados del TTOG no concuerdan con los de la MCG. La MCG permite el diagnóstico de anomalías de la glucosa no detectadas mediante el TTOG y sus resultados podrían contribuir a optimizar el tratamiento de la prediabetes en estos pacientes.
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