The antinuclear antibody (ANA) test is positive in almost all people who have systemic lupus erythematosus (SLE) . It is also positive in some patients who do not have SLE. The anti-deoxyribonucleic acid (DNA) test is positive only in people with SLE but not in all who do. Which of the following is true?
A) The ANA test is a good screening test, and anti-DNA test is a good confirmatory test.
B) The anti-DNA test is a good screening test, and the ANA test is a good confirmatory test.
C) Both are good screening tests for SLE.
D) Neither of these tests is valid.
Correct Answer:
Verified
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