A member asked:

What is considered a positive result for the sm antibody for sle? my ana 1:320 but dna was negative. so many blood tests for sle diagnosis!!

A doctor has provided 1 answer
Dr. Leila Hashemi answered

Specializes in Internal Medicine

hi, diagnosis of SLE is not base on blood test, positive DsDNA and ANA are just one out of 11 criteria for diagnosis of SLE, to diagnose SLE you need to have 4 out of 11 criteria. ANA is a non- specific test and false positive rate is high, especially in women and elderly.

Answered May 9, 2016

3.5k views

Thank

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