The value of hemoglobin A1c for diagnosis of diabetes mellitus and other changes in carbohydrate metabolism in women with recent gestational diabetes mellitus

Diabetes mellitus and abnormal glucose tolerance development after gestational diabetes: A three-year, prospective, randomized, clinical-based, Mediterranean lifestyle interventional study with parallel groups

“…At every visit to the unit, which was 45 min in duration, the women received an individual reinforcement session concerning nutrition and physical activity, a revaluation of their habits using the previously mentioned questionnaires, body weight, waist circumference and blood pressure measurements and an evaluation of the analyses, including an overload glucose tolerance test with 75 g of glucose. The method chosen for the diagnosis of glucose disorders was the OGTT because is more accurate in order to classify the different diagnosis and better validated for our population than the HbA1c [19]. The women of the control group were referred to their primary care physician for conventional follow-up after receiving the group educational session at the time of the randomization.…”

Comparing glucose and hemoglobin A1c diagnostic tests among a high metabolic risk Hispanic population

“…Diabetes prevalence is increasing worldwide, and it is important to study the diagnostic accuracy of HbA 1c and its relationship with other important metabolic and clinical parameters. Even though some reports propose that HbA 1c is useful as a diagnostic criterion of diabetes, others suggest that its diagnostic usefulness is inferior to standard testing because of a low sensitivity . Given the HbA 1c variability among different racial/ethnic groups, its value as a diagnostic tool for diabetes in high‐risk populations has been the source of great debate .…”

2. Classification and Diagnosis of Diabetes

“…Therefore, it remains unclear if A1C and the same A1C cut point should be used to diagnose diabetes in children and adolescents (3)(4)(5).…”