Like almost every suggestion these so-called experts have made since they started -meddling in diabetes diagnosis in 1978 this one will condemn millions of Americans to live with undiagnosed diabetes for years--years during which their daily exposure to damagingly high blood sugars will ensure they develop the diabetic complications--heart disease, nerve damage, and kidney failure that prove so profitable to drug companies.
And no, this isn't my opinion. This is the conclusion drawn by researchers who looked at what would happen had a large pool of people being screened for diabetes been screened with the A1c test instead of the Glucose Tolerance test that revealed that many of them had diabetes or pre-diabetes.
The study is reported here:
Screening for Diabetes and Pre-Diabetes With Proposed A1C-Based Diagnostic Criteria Darin E. Olsen et al. Diabetes Care October 2010 vol. 33 no. 10 2184-2189. doi: 10.2337/dc10-0433
This team examined the records of 4,706 Non-Hispanic white or black adults without known diabetes. These people were given both A1C tests and a 75-g Oral Glucose Tolerance Test (GTT) when they participated in either the prospective Screening for Impaired Glucose Tolerance study (n = 1,581), the National Health and Nutrition Examination Survey (NHANES) III (n = 2014), or NHANES 2005–2006 (n = 1,111).
When the researchers compared diagnoses made using the oral glucose tolerance test with those made using the ADA's new A1c criteria they found:
The proposed criteria missed 70% of individuals with diabetes, 71–84% with dysglycemia, and 82–94% with pre-diabetes.And if that isn't bad enough, they also found that
There were also racial differences, with false-positive results being more common in black subjects and false-negative results being more common in white subjects.Applying the NHANES 2005–2006 data, the researchers estimated that,
... approximately 5.9 million non-Hispanic U.S. adults with unrecognized diabetes and 43–52 million with pre-diabetes would be missed by screening with A1C.Unfortunately, such is the clout of the American Diabetes Association and its Experts, that huge numbers of doctors around the U.S. have already switched to screening patients using the A1c test. One huge factor driving this change is because doctors can earn extra money by administering A1c tests to patients in their office.
As documented earlier, these in-office tests are extremely unreliable. Details HERE.
But this latest study adds to our misery by making it clear that even accurate lab A1c tests miss most cases of diabetes diagnosed by the GTT.
So millions of people who ask their doctor if they might be developing diabetes will be given an in-office A1c test (billed by the doctor at five times its actual cost) and then be reassured by their family doctors that they are "fine" when, in fact, they are walking around with blood sugar levels high enough to damage their heart, their arteries, their nerves, their retinas, and their kidneys.
If you rely on an A1c to diagnose diabetes you can be certain that by the time that A1c has risen high enough to earn a diagnosis, you will have serious, even irreversible damage that could have been avoided had you only been given timely warning that your blood sugar level after meals is high enough to damage your organs.
To learn what blood sugar levels have been proven to cause organ damage visit this page HERE.
To learn how to test your blood sugar at home to find out if you are running blood sugars high enough to damage your organs visit this page HERE.
If you learn you are running higher than normal blood sugars you can lower them using this very simple technique described HERE.
If you are black, you may, conversely, be told that they have diabetes based on an A1c test when you don't. A growing body of evidence suggests that the A1c test is a poor guide to blood sugar control in black people, probably because of differences in the genes that govern their red blood cells.
A false positive diabetes diagnosis isn't as damaging to your body as a false negative, because if a false positive usually leads to you taking steps to lower your blood sugar. This helps everyone as there's evidence that even people whose blood sugar is completely normal according to the Glucose Tolerance Test have a significantly higher risk of heart attack if their blood sugar does not return to its fasting level by the end of the test. (You can read details of that study HERE.)
But a false positive may make it prohibitively expensive for someone misdiagnosed this way to buy affordable health insurance in the US and that, too, can be harmful.