Reumatoid factor (RF)

Reumatoid factor (RF) values and definitions

Negative referent values of reumatoid factor (rf) test are between 0 and <20 U/mL.
:
| :
:
:
0   -
<20
U/mL
negative

Equivocal referent values of reumatoid factor (rf) test are between 20 and 30 U/mL.
:
| :
:
:
20   -
30
U/mL
Equivocal

Positive referent values of reumatoid factor (rf) test are between >30 and n/a U/mL.
:
| :
:
:
>30   -
n/a
U/mL
positive

Also see:

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LOW ANTISTREPTOLYSIN O TITRE (ASOT) TEST RESULT POSITIVE REFERENT VALUES FOR PRESCHOOL What does low Antistreptolysin O titre (ASOT) test result positive referent values for preschool level mean?

HIGH HEMOGLOBIN (HB) TEST RESULT REFERENT VALUES FOR MALE What does high Hemoglobin (Hb) test result referent values for male level mean?

HIGH CYTOPLASMIC/CLASSICAL ANTI-NEUTROPHIL CYTOPLASMIC ANTIBODIES (C-ANCA) TEST RESULT NEGATIVE REFERENT VALUES What does high Cytoplasmic/classical anti-neutrophil cytoplasmic antibodies (c-ANCA) test result negative referent values level mean?

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LOW BICARBONATE (HCO3) TEST LEVEL What does lower than normal bicarbonate (HCO3) mean?

HIGH UREA TEST RESULT REFERENT VALUES What does high Urea test result referent values level mean?

LOW PERINUCLEAR ANTI-NEUTROPHIL CYTOPLASMIC ANTIBODIES (P-ANCA) TEST RESULT POSITIVE REFERENT VALUES What does low Perinuclear anti-neutrophil cytoplasmic antibodies (p-ANCA) test result positive referent values level mean?

HIGH ANTI-CITRULLINATED PROTEIN ANTIBODIES TEST RESULT WEAKPOSITIVE REFERENT VALUES What does high Anti-citrullinated protein antibodies test result weak positive referent values level mean?

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