Where Rheumatoid factor (RF) is reported
Also listed as: Autoimmune marker; Rheumatoid Factor
| Condition | Direction | Compared against | Associated symptoms | Source |
|---|---|---|---|---|
| Gulf War Illness | ↕ inconsistent | healthy Gulf War veteran controls | Joint pain subset | Gean et al. 2021 |
| Rheumatoid Arthritis | ↑ elevated | RA (positive in 80-85%) vs healthy (rare) | — | Matuszewska et al. 2016 |
Frequently asked questions
In which conditions is Rheumatoid factor (RF) altered?
In the OSMF atlas Rheumatoid factor (RF) is reported in Gulf War Illness, Rheumatoid Arthritis. It is elevated in 1, mixed in 1 across 2 entries.
Does Rheumatoid factor (RF) point to one specific diagnosis?
No. Because Rheumatoid factor (RF) changes in several conditions (Gulf War Illness, Rheumatoid Arthritis), an abnormal result cannot identify which condition, if any, is present. It must be interpreted with symptoms, history and other tests.
Is there a standard clinical test for Rheumatoid factor (RF)?
The atlas entries for Rheumatoid factor (RF) do not carry a LOINC code, which usually means the marker was measured with research assays or study-specific methods rather than a routine clinical panel.
Is one abnormal Rheumatoid factor (RF) result diagnostic?
No single biomarker result is diagnostic of any of these conditions. Findings reflect group averages from published cohorts with substantial overlap between patients and controls.
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Last reviewed: 2026-07-03 · Browse: Biomarker Index · All marker pages · Biomarker Atlas
Disclaimer: Educational synthesis of peer-reviewed research; not medical advice. Findings are group-level and vary with study design. Discuss any result with a qualified clinician.