Rheumatoid Factor (RF): What Affects The Test
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What Affects the Test
Reasons you may not be able to have the test or why the results may not be helpful include:
- Blood that is very high in fats.
- Age. About 5% to 10% of people older than age 65 have a high RF level.
| Last updated: | June 12, 2008 |
|---|---|
| Author: | Shannon Erstad, MBA/MPH |
| Reviewed By: | Kathleen Romito, MD - Family Medicine, Stanford M. Shoor, MD - Rheumatology |
| Editors: | Susan Van Houten, RN, BSN, MBA, Tracy Landauer |
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