OBJECTIVE HbA(1c) is a standard clinical assessment of glycemia and the basis of most data relating glycemic control to complications. It remains unclear, however, whether HbA(1c) is affected by glycemic variation and mean glycemia. RESEARCH DESIGN AND METHODS To test this question, we analyzed the statistical relationship between HbA(1c) levels and glycemic variability as measured by self-mo...

OBJECTIVE To describe the trajectory of HbA(1c) and glucose concentrations before the diagnosis of diabetes. RESEARCH DESIGN AND METHODS The study comprised 1,722 nondiabetic Japanese individuals aged 26-80 years. Fasting plasma glucose (FPG) and HbA(1c) were measured annually for a mean of 9.5 (SD 1.8) years. RESULTS Diabetes occurred in 193 individuals (FPG ≥ 7.0 mmol/L, self-reported cli...

INTRODUCTION The discordance between glycated hemoglobin (HbA(1C)) and fructosamine (FA) estimations in the assessment of glycemia is often encountered. A number of mechanisms might explain such discordance, but whether or not they are consistent is uncertain. Nevertheless, the fact that there is a discrepancy in HbA(1C) and mean blood glucose cannot be ignored in the monitoring of glycemic con...

OBJECTIVE The study objective was to assess the relationship between β-cell function and HbA(1c). RESEARCH DESIGN AND METHODS A total of 522 Mexican American subjects participated in this study. Each subject received a 75-g oral glucose tolerance test (OGTT) after a 10- to 12-h overnight fast. Insulin sensitivity was assessed with the Matsuda index. Insulin secretory rate was quantitated from...

BACKGROUND Ranolazine is a novel antianginal shown in an exploratory analysis in patients with diabetes mellitus and chronic angina to be associated with a decline in hemoglobin A(1c) (HbA(1c)). We designed a prospective evaluation of the effect of ranolazine on hyperglycemia as part of a randomized, double-blind, placebo-controlled outcomes trial. METHODS AND RESULTS We compared HbA(1c) (per...

BACKGROUND/AIMS The application of glycated hemoglobin (HbA(1c)) for the diagnosis of diabetes is currently under extensive discussion. In this study, we explored the validity of using HbA(1c) as a screening and diagnostic test in Chinese subjects recruited in Nanjing, China. METHODS In total, 497 subjects (361 men and 136 women) with fasting plasma glucose (PG) ≥ 5.6 mmol/L were recruited to...

BACKGROUND The relationship between the degree of glycaemic control and mortality remains an important topic of discussion. AIM This study aimed to investigate this relationship. DESIGN OF STUDY Prospective cohort study. SETTING Primary care. METHOD A total of 1145 patients with type 2 diabetes were enrolled in the Zwolle Outpatient Diabetes project Integrating Available Care (ZODIAC) i...

HbA(1c) is a standard clinical assessment of glycemia and the basis of most data relating glycemic control to complications. While daily blood glucose testing gives a picture of day-to-day fluctuations, the HbA(1c) test offers an overview of how well glucose has been controlled over the past 4 months. I devised an innovative mathematical model to describe novel equations governing HbA(1c) which...

OBJECTIVE Hemoglobin A(1c) (HbA(1c)) is recommended for identifying diabetes and prediabetes. Because HbA(1c) does not fluctuate with recent eating or acute illness, it can be measured in a variety of clinical settings. Although outpatient studies identified HbA(1c)-screening cutoff values for diabetes and prediabetes, HbA(1c)-screening thresholds have not been determined for acute-care setting...

BACKGROUND The national programs for the harmonization of hemoglobin (Hb)A(1c) measurements in the US [National Glycohemoglobin Standardization Program (NGSP)], Japan [Japanese Diabetes Society (JDS)/Japanese Society of Clinical Chemistry (JSCC)], and Sweden are based on different designated comparison methods (DCMs). The future basis for international standardization will be the reference syst...