The following are examples of types of financial analysts: Portfolio managers select the mix of products, industries, and regions for their companyâs investment portfolio. These managers are responsible for the overall performance of the portfolio.
Rheumatoid factor (RF) facts. 1  Rheumatoid factor is an antibody that is detectable in the blood of approximately 80% of adults with rheumatoid arthritis.2  Sometimes rheumatoid factor can be detected in the blood of normal individuals and of those with other autoimmune diseases that are not rheumatoid arthritis.heumatoid factor (RF) facts. 1  Rheumatoid factor is an antibody that is detectable in the blood of approximately 80% of adults with rheumatoid arthritis.
What is the normal range for rheumatoid factor? The normal range (or negative test result) for rheumatoid factor is less than 14 IU/ml. Any result with values 14 IU/ml or above is considered abnormally high, elevated, or positive. Most commonly, rheumatoid factor is used as a blood test for the diagnosis of rheumatoid arthritis.