We investigated the usefulness of a single value of maternal HbA1c in late pregnancy as a predictor for neonatal hypoglycaemia and secondly, to find the appropriate threshold value. A prospective analysis of the HbA1c concentration between 36 to 38 weeks of gestation in 150 pregnant mothers with either pre-existing or gestational diabetes was performed. At delivery, glucose levels in the cord blood were analysed. Neonatal hypoglycaemia was defined as a blood sugar level of < 2.6 mmol/l. Receiver operator characteristic curve was constructed to evaluate the value of HbA1c concentration in predicting hypoglycaemia. There were 16 foetuses who were hypoglycaemic at delivery. The area under the ROC curve for predicting neonatal hypoglycaemia was 0.997 with a 95% confidence interval of 0.992 to 1, a very good prediction rate. The optimal threshold value for HbA1c in predicting hypoglycaemia in the foetus was 6.8% (51 mmol/mol). HbA1c level in late pregnancy is a good predictor for hypoglycaemia in the newborn.
Hypoglycemia is an essential issue for diabetic patients and considered a limiting factor in the glycemic management. Heterogeneity of the diseases in Type 2 Diabetes Mellitus can affect the frequency of hypoglycemia, especially when the patient has cardiovascular diseases. There are several factors that lead to hypoglycemia including sulfonylurea therapy, insulin therapy, delaying or missing a meal, physical exercise, or alcohol consumption. Long-term studies reported that repeated hypoglycemia could increase the risk of cardiovascular diseases. During Ramadan fasting, diabetic patients have high incidence of hypoglycemia. Therefore, focused education about hypoglycemia in routine life of diabetic patients and during fasting in Ramadan is important to reduce the complications.
Hyperinsulinism-hyperammonemia syndrome (HI/HA) (OMIM 606762), the second most common form of congenital hyperinsulinism (CHI) is associated with activating missense mutations in the GLUD1 gene, which encodes the mitochondrial matrix enzyme, glutamate dehydrogenase (GDH). Patients present with recurrent symptomatic postprandial hypoglycemia following protein-rich meals (leucine-sensitive hypoglycemia) as well as fasting hypoglycemia accompanied by asymptomatic elevations of plasma ammonia. In contrast to other forms of CHI, the phenotype is reported to be milder thus escaping recognition for the first few months of life. Early diagnosis and appropriate management are essential to avoid the neurodevelopmental consequences including epilepsy and learning disabilities which are prevalent in this disorder. We report an infant presenting with afebrile seizures secondary to hyperinsulinemic hypoglycemia resulting from a novel de novo mutation of the GLUD1 gene.
AIMS: The present Malaysian cohort analysis determined the prevalence of hypoglycemia among patients with type 1 diabetes mellitus (T1DM) or type 2 diabetes mellitus (T2DM) attending primary care- or hospital-based diabetes clinics in Malaysia and their awareness of the symptoms of hypoglycemia.
METHODS: The Hypoglycemia Assessment Tool (HAT) study was a non-interventional, 6-month retrospective and 4-week prospective analysis of hypoglycemic events in 24 countries, using self-assessment questionnaires and diaries among patients with T1DM/T2DM aged ≥18years, using insulin for >12months. This report focuses on prospective data, as they are less prone to recall bias.
RESULTS: There were 1153 participants in the Malaysian cohort (114 T1DM; 1039 T2DM). In the prospective period, 50.4% and 33.4% of patients reported ≥1 hypoglycemic events, with estimated rates of 20.3 and 13.1 events per patient-year of exposure in patients with T1DM and T2DM, respectively. 24.8% and 16.1% of patients with T1DM or T2DM, respectively, reported ≥1 nocturnal hypoglycemic event. The majority of patients (96.5%, T1DM; 91.8%, T2DM) knew what hypoglycemia was prior to the study. Impaired awareness was present in 48.0% (T1DM) and 36.9% (T2DM) of patients. In the prospective period, 50% of patients with T1DM or T2DM consulted a doctor or nurse following a hypoglycemia episode.
CONCLUSIONS: Half of patients with T1DM and a third of patients with T2DM reported ≥1 hypoglycemic event during the prospective period. Although the majority of patients knew the typical features of hypoglycemia, many reported impaired ability to recognize symptoms in real life. The present findings highlight the importance of patient education and physician awareness in dealing with hypoglycemia, in particular the burden of hypoglycemic unawareness.
CLINICAL TRIAL NUMBER: This trial was registered at www.clinicaltrials.gov as NCT01696266 on 26 September 2012.