About Antinuclear Antibodies Titer
The ANA titer reports the strength of the antinuclear antibody signal, expressed as the highest dilution at which antibodies are still detectable. Higher titers (1:320 and above) are more likely to reflect true autoimmune disease, while low titers (1:40–1:80) are frequently seen in healthy individuals and carry less clinical significance. The titer alone doesn't diagnose any specific disease — it must be interpreted with the pattern and specific antibody subtests in the context of symptoms.