Do You Have Diabetes? Three Ways To Test

Diabetes has steadily become a major public health problem over the years. According to the juvenile diabetes association, more than 120 million people in the United States. have diabetes, the majority of  them with type 2 diabetes. As the federal government and insurance companies begin to face rising health care costs of treating diabetes and the accompany problems, there is a great incentive to begin to identify those at risk for diabetes before they actually develop this chronic disease.

One way of doing this is with various types of diabetes pre-screening tests. Diabetes is defined as a metabolism disorder where the person has excessive sugar in the blood. Testing, however, cannot be performed by simply drawing blood and measuring the glucose levels. This is because a significant portion of the public has normal blood glucose levels during the day but raised glucose levels as they eat during the day. Any valid test for diabetes has to take this into account.

Medical care practitioners use 3 primary text to determine if someone has diabetes. What they measure is how fast and efficiently your body is able to clear excess glucose from your blood stream. If the test reveals that you have relatively high glucose levels, it is a good indication that you have glucose intolerance, pre-diabetes, or diabetes. The 3 tests are:

1) Random or casual plasma glucose testing - the patient can be tested at any point in the day. According to the American Diabetes Association, if the test shows a casual plasma glucose concentration of 200 milligrams per deciliter (mg/dl), it has met the criteria for a diagnosis of diabetes.

2) Fasting plasma glucose (FPG) testing - sometimes referred to as the fasting blood sugar test because the patient has to fast before the test is administered. Fasting, in this context, means that the patient has not consumed food or drink, other than water, for at least eight hours prior to the test. It’s probably most convenient when done first thing in the morning after a night’s sleep. The test measures blood sugar levels. The normal glucose level after fasting is approximately 100 mg/dl. A diagnosis of diabetes can be made if the glucose concentration is 126 mg/dl or more. Monitoring of the blood glucose measurements persists throughout the day. Because this test is relatively inexpensive, it is a popular one with insurance companies and health care providers. This is also a standard test given to check for pre-diabetes.

3) Oral Glucose Tolerance Test (OGTT) - This is the most comprehensive of the tests and considered the best by many. It’s more sensitive than the FPG test plus it can test for impaired glucose intolerance which the other two cannot. However, It is also the most expensive which makes it the least popular with insurance companies and health providers. The test is performed two hours after orally taking 75 grams of glucose. If the blood glucose results show 200 mg/dl or greater, a diagnosis of diabetes can be made.

It is possible that a test, for any number of reasons, can give a false positive and indicate that a person has diabetes when, in fact he doesn’t. This is why a diagnosis is not usually rendered until the results are confirmed with a repeat test.