Testing environments, such as temperature in the lab, equipment used, and handling of samples, can affect the results however, this is more common in the fasting plasma glucose and the OGTT than in the A1C. Sometimes, however, in the early stages of diabetes, blood sugar levels are not high enough to show up as problematic. How accurate are A1C tests?Ī1C levels rise well before the clinical onset of diabetes, making early diagnosis possible according to the 2017 Standards of Medical Care in Diabetes by the American Diabetes Association (ADA). If the results are borderline or if the results of the different tests do not match, a doctor might suggest repeating the test in several weeks or months. Another test, the random plasma glucose test, which does not require fasting, can also be used. If A1C test results indicate a person has or might have diabetes, a healthcare provider might suggest one of these tests to confirm the results. Unlike the fasting plasma glucose (FPG) and the OGTT tests, there is no need to fast before having the A1C test. Do you have to fast for an A1C blood test? The A1C blood test is not for diagnosing Type 1 diabetes, gestational diabetes, or cystic fibrosis-related diabetes, according to the National Institute of Diabetes and Digestive and Kidney Diseases ( NIDDK ). To determine if treatment adjustments are needed.There are a few reasons a doctor might suggest an A1C test: RELATED: Diabetes medications and treatments A1C test The results provide patients and their healthcare providers with information on how well their treatment, diet, and medication is working and whether adjustments are necessary. The higher blood sugar levels are, the more glucose attaches to hemoglobin. “It does this by measuring the percentage of red blood cell hemoglobin protein that has sugar stuck to it and provides a three-month average of your blood glucose levels,” explains Marie Bellantoni, MD, a board-certified endocrinologist at the Center for Endocrinology at Mercy Medical in Baltimore. An A1C test (sometimes called the HbA1C test or glycohemoglobin test) provides information on how well-controlled a person’s diabetes is. Hemoglobin A1C (HbA1C), commonly called A1C, stands for glycosylated hemoglobin. The test results keep track of how well a person is managing his or her diabetes. Unlike blood sugar meters people use at home, the A1C measures an average blood sugar level over the past several months by analyzing how many of a patient’s hemoglobin cells have glucose attached to them. Whether someone has had diabetes mellitus for years or if they have just been diagnosed, they have probably heard about this test. The hemoglobin A1C test is the closest thing to a diabetes scorecard you can find.
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