If the result of tissue transglutaminase antibody, IgG is <6 U/mL, then there is no antibody detected; if ≥6 U/mL the antibody is detected.
If the result of tissue transglutaminase antibody, IgA is <4 U/mL, then there is no antibody detected; if ≥4 U/mL the antibody is detected.
Test results may vary depending on your age, gender, health history, the method used for the test, and other things.
Your test results may not mean you have a problem. Keep in mind that no one test can say for sure that you have celiac disease. Your healthcare provider will use other things to help confirm the diagnosis.
The higher the levels of anti-tissue transglutaminase antibodies in your blood, the more likely it is that you have it or a related disorder.
Younger children are an exception to this rule. A test may come back negative even if the child has celiac disease. But other tests can give a proper diagnosis.