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A 42-year-old member asked:

whats a normal level for sm antibody?

1 doctor answer4 doctors weighed in
Dr. John Goldman
Rheumatology 55 years experience
Depends on whose sm: Different labs have different ranges for their positive test. They usually set the range for detection at a certain level. Below that level they have many people without lupus that would have a + test. Above that level is what they call a + test. But not all labs are created equal - so each has there own level determined by their scientific investigations.

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A 33-year-old member asked:

What is a normal level for sm antibody?

1 doctor answer2 doctors weighed in
Dr. Gurmukh Singh
Pathology 49 years experience
Negative: Normal people do not have antibodies to sm antigen. It is one of the markers for lupus.

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Last updated Sep 16, 2012
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