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Interpret Your Antinuclear Antibodies Results
Enter your ANA value below and get an instant, free AI interpretation — a plain-English explanation checked against WHO/IFCC reference ranges.
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This AI-generated interpretation is for educational purposes only and does not constitute medical advice, diagnosis, or treatment. Results may vary based on individual health factors not captured here.
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Antinuclear Antibodies Normal Ranges
ANA (Antinuclear Antibodies) is a screening test for autoimmune diseases.
| Reference Range | Unit | Notes |
|---|---|---|
| < 1:1 | titer | Negative <1:40 titer; Positive ≥1:80 |
Also reported in: ratio.
Common Causes of High ANA
Systemic Lupus Erythematosus (SLE) — nearly 100% sensitiveSjögren's syndromeScleroderma (systemic sclerosis)
Common Causes of Low ANA
A negative ANA makes SLE very unlikely (<5% of confirmed SLE are ANA negative)
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