<P> The reference ranges for blood tests of anti--citrullinated protein antibodies are: </P> <Table> <Tr> <Td> Negative </Td> <Td> Low / weak positive </Td> <Td> Moderate positive </Td> <Td> High / strong positive </Td> <Td> Unit </Td> </Tr> <Tr> <Td> <20 </Td> <Td> 20--39 </Td> <Td> 40 - 59 </Td> <Td>> 60 </Td> <Td> EU </Td> </Tr> </Table> <Tr> <Td> Negative </Td> <Td> Low / weak positive </Td> <Td> Moderate positive </Td> <Td> High / strong positive </Td> <Td> Unit </Td> </Tr> <Tr> <Td> <20 </Td> <Td> 20--39 </Td> <Td> 40 - 59 </Td> <Td>> 60 </Td> <Td> EU </Td> </Tr>

Cyclic citrullinate peptide (ccp) antibody igg