Table 1 The 2010 ACR/EULAR classification criteria for rheumatoid arthritis

Joint distribution

1 large joint

0

2-10 large joints

1

1-3 small joints (large joints not counted)

2

4-10 small joints (large joints not counted)

3

>10 joints (at least one small joint)

5

Serology

Negative RF AND negative ACPA

0

Low positive RF OR low positive ACPA

2

High positive RF OR high positive ACPA

3

Symptom duration

<6 weeks

0

≥6 weeks

1

Acute phase reactants

Normal CRP AND normal ESR

0

Abnormal CRP OR abnormal ESR

1