BACKGROUND Recently, the American Diabetes Association (ADA) has included glycated hemoglobin A1(c) (A1C) level as a component of diagnostic criteria of 'diabetes' or 'increased risk for diabetes'. This study was conducted to examine the prevalence of and risk factors for 'elevated A1C' (≥5.7%) in women with polycystic ovary syndrome (PCOS). METHODS A1C was measured using an immunoturbidimetr...

OBJECTIVE This research investigated recent changes in the prevalence and management status of diabetes among Korean adults. RESEARCH DESIGN AND METHODS The Korea National Health and Nutrition Examination Survey (KNHANES), a nationwide survey examining the general health and nutrition status of the Korean people, was conducted in 1998, 2001, and 2005. Using the first (1998; n = 5,645), second...

BACKGROUND Patients with diabetes have increased in-hospital mortality following acute myocardial infarction (AMI), with studies suggesting higher risk with both hypoglycemia and hyperglycemia. We assessed whether a J-shaped relation exists between hemoglobin A1c (A1C) in patients with diabetes and AMI. METHODS We assessed the associations between A1C and in-hospital mortality using data from...

OBJECTIVE To identify patient factors associated with change in hemoglobin A1C (A1C) with adjunct pioglitazone therapy in routine clinical practice. METHODS This was a retrospective analysis of adult type 2 diabetes mellitus patients in a health maintenance organization setting who were newly-initiated on pioglitazone between January 2002 and December 2005. Eligible patients were receiving at...

OBJECTIVE No guidelines for A1C measurement exist for women with gestational diabetes mellitus (GDM). The aim of this study was to document the rate of A1C decline in women with GDM. RESEARCH DESIGN AND METHODS Women with GDM in the Santa Barbara County Endocrine Clinic are managed with a carbohydrate-restricted diet and self-monitored blood glucose before and 1-h postprandial. Insulin is sta...

OBJECTIVE To identify the characteristics associated with glycemic response to newly initiated insulin therapy. RESEARCH DESIGN AND METHODS We identified 1,139 type 2 diabetic patients who initiated insulin therapy between 1 January 2009 and 30 June 2010. Outcomes of interest were the proportion of patients achieving A1C <7% and mean change in A1C within 3-9 months. RESULTS Mean A1C at insu...

OBJECTIVE To evaluate A1C for screening and diagnosis of undiagnosed type 2 diabetes defined by oral glucose tolerance testing in clinical and general populations. RESEARCH DESIGN AND METHODS A1C cut offs (< or =5.5% to rule out diabetes; > or =7.0% to rule in diabetes) were derived from a clinical group (Melbourne Pathology [MP] group: n = 2,494; undiagnosed diabetes 34.6%) and then evaluate...

OBJECTIVE Slowing the diabetes epidemic in Africa requires improved detection of prediabetes. A1C, a form of glycated hemoglobin A, is recommended for diagnosing prediabetes. The glycated proteins, fructosamine and glycated albumin (GA), are hemoglobin-independent alternatives to A1C, but their efficacy in Africans is unknown. Our goals were to determine the ability of A1C, fructosamine, and GA...

Hemoglobin A1c (Hb A1c) 1 is a mainstay of diabetes diagnosis and management that allows clinicians to estimate the recent mean blood glucose concentration of a patient. Glycation of hemoglobin is an irreversible, nonenzymatic process that depends on the glucose concentration in red blood cells (RBCs), and Hb A1c represents the integrated glucose concentration in RBCs over their life span. RBC ...