UNDER REVIEW AND EDITING: VALUES NOT CONFIRMED
A reference range is a set of values used by a health professional to interpret a set of medical test results. The range is usually defined as the set of values 95% of the normal population falls within.
The reference range will vary, depending on the age, sex and race of a population, and even the instruments the laboratory uses to perform the tests. Furthermore, by definition, 5% of the normal population will fall outside the reference range.
|Acute phase protein markers of Inflammation||Erythrocyte sedimentation rate (ESR)||0||(Age, +10 if female)/2||mm/hr|
|C-reactive protein (CRP)||0||6||mg/L|
|Autoantibodies||Antinuclear antibodies (ANA)|
|Extractable nuclear antigen (ENA)|
|Rheumatoid factor (RF)||0||20||IU/mL||High levels not specific for Rheumatoid Arthritis alone.|
|Serology||Antistreptolysin O titre (ASOT) – preschoolers||n/a||100||units/mL|
|Antistreptolysin O titre (ASOT) – others||n/a||200||units/mL|