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# hba1c diabetes diagnosis

Ac diabetes diagnosis -

The A1C test should not be used to diagnose type 1 diabetes , gestational diabetes , or cystic fibrosis -related diabetes. The A1C test may give false results in people with certain conditions. Having prediabetes is a risk factor for developing type 2 diabetes. Within the prediabetes A1C range of 5.

Health care professionals may use the A1C test early in pregnancy to see if a woman with risk factors had undiagnosed diabetes before becoming pregnant.

Since the A1C test reflects your average blood glucose levels over the past 3 months, testing early in pregnancy may include values reflecting time before you were pregnant. The glucose challenge test or the oral glucose tolerance test OGTT are used to check for gestational diabetes , usually between 24 and 28 weeks of pregnancy.

If you had gestational diabetes, you should be tested for diabetes no later than 12 weeks after your baby is born. If your blood glucose is still high, you may have type 2 diabetes.

Even if your blood glucose is normal, you still have a greater chance of developing type 2 diabetes in the future and should get tested every 3 years.

Health care professionals also use the fasting plasma glucose FPG test and the OGTT to diagnose type 2 diabetes and prediabetes.

For these blood glucose tests used to diagnose diabetes , you must fast at least 8 hours before you have your blood drawn. In some cases, health care professionals use the A1C test to help confirm the results of another blood glucose test.

In some people, a blood glucose test may show diabetes when an A1C test does not. The reverse can also occur—an A1C test may indicate diabetes even though a blood glucose test does not.

Because of these differences in test results, health care professionals repeat tests before making a diagnosis. People with differing test results may be in an early stage of the disease, when blood glucose levels have not risen high enough to show up on every test. In this case, health care professionals may choose to follow the person closely and repeat the test in several months.

Lab test results can vary from day to day and from test to test. This can be a result of the following factors:. Your results can vary because of natural changes in your blood glucose level. For example, your blood glucose level moves up and down when you eat or exercise. Sickness and stress also can affect your blood glucose test results.

A1C tests are less likely to be affected by short-term changes than FPG or OGTT tests. The following chart shows how multiple blood glucose measurements over 4 days compare with an A1C measurement. The straight black line shows an A1C measurement of 7.

The blue line shows an example of how blood glucose test results might look from self-monitoring four times a day over a 4-day period. Conditions that change the life span of red blood cells, such as recent blood loss, sickle cell disease , erythropoietin treatment, hemodialysis , or transfusion, can change A1C levels.

A falsely high A1C result can occur in people who are very low in iron; for example, those with iron-deficiency anemia. Other causes of false A1C results include kidney failure or liver disease.

People in these groups may have a different type of hemoglobin, known as a hemoglobin variant, which can interfere with some A1C tests.

Most people with a hemoglobin variant have no symptoms and may not know that they carry this type of hemoglobin. Not all A1C tests are unreliable for people with a hemoglobin variant. People with false results from one type of A1C test may need a different type of A1C test to measure their average blood glucose level.

The NGSP provides information for health care professionals about which A1C tests are appropriate to use for specific hemoglobin variants. Read about diabetes blood tests for people of African, Mediterranean, or Southeast Asian descent. Some people with prediabetes may have some of the symptoms of diabetes or even problems from diabetes already.

You usually find out that you have prediabetes when being tested for diabetes. You will not develop type 2 diabetes automatically if you have prediabetes. For some people with prediabetes, early treatment can actually return blood glucose levels to the normal range.

Don't worry if you can't get to your ideal body weight. Losing even 10 to 15 pounds can make a huge difference. Breadcrumb Home About Diabetes Diagnosis. Fasting plasma glucose testing has been shown to have slightly lower sensitivity for predicting microvascular complications from diabetes compared with the two-hour OGTT, but it is easier to perform compared with the two-hour OGTT.

Therefore, fasting plasma glucose testing is widely used as the preferred diagnostic test. Some physicians believe that because glycemic treatment for diabetes is not aggressively initiated until A1C levels are 7 percent or more, A1C testing can be used for diagnosis despite its low sensitivity.

However, there are other important interventions e. Peters AL, Davidson MB, Schriger DL, Hasselblad V for the Meta-analysis Research Group on the Diagnosis of Diabetes Using Glycated Hemoglobin Levels. A clinical approach for the diagnosis of diabetes mellitus: an analysis using glycosylated hemoglobin levels [Published correction appears in JAMA ;].

Rohlfing CL, Little RR, Wiedmeyer HM, England JD, Madsen R, Harris MI, et al. Use of GHb HbA1c in screening for undiagnosed diabetes in the U. population [Published correction appears in Diabetes Care ;].

Diabetes Care. Report of the Expert Committee on the Diagnosis and Classification of Diabetes Mellitus. European Diabetes Policy Group A desktop guide to type 2 diabetes mellitus.

Diabet Med. American Diabetes Association. Standards of medical care in diabetes [Published correction appears in Diabetes Care ;]. Clinical Inquiries provides answers to questions submitted by practicing family physicians to the Family Physicians Inquiries Network FPIN.

Members of the network select questions based on their relevance to family medicine. Answers are drawn from an approved set of evidence-based resources and undergo peer review. The complete database of evidence-based questions and answers is copyrighted by FPIN.

Diabeetes A1C test can be used to Pomegranate Nutritional Supplements diabetes or help you know Ac diabetes diagnosis your treatment plan is diqgnosis by giving Leafy green suppliers a diaebtes of your average riagnosis glucose blood sugar over the Ac diabetes diagnosis two to three months. It can diiagnosis prediabeteswhich raises your risk for diabetes. It can be used to diagnose diabetes. And it's used to monitor how well your diabetes treatment is working over time. It's also a critical step in forming your game plan to manage diabetes with your diabetes care team. This relatively simple blood test can tell you a lot. The test results give you a picture of your average blood glucose blood sugar level over the past two to three months. There are several ways diagnossi diagnose diabetes. Each way usually needs diagbosis be repeated on a second day to diagnose diabetes. If your doctor Energy-packed meal ideas Ac diabetes diagnosis your blood Effective appetite suppressant pills Guarana Supplements Online Ac diabetes diagnosis dixgnosis is very high, or if you have classic symptoms of high blood glucose in addition to one positive test, your doctor may not require a second test to diagnose diabetes. The A1C test measures your average blood glucose for the past two to three months. The advantages of being diagnosed this way are that you don't have to fast or drink anything. This test checks your fasting blood glucose levels.