Table 1 2010 ACR/EULAR classification criteria for RA [12]

Joint distribution (0–5)

 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 (0–3)

 Negative RF AND negative ACPA

0

 Low positive RF OR low positive ACPA

2

 High positive RF OR high positive ACPA

3

Symptom duration (0–1)

< 6 weeks

0

≥ 6 weeks

1

Acute phase reactants (0–1)

 Normal CRP AND normal ESR

0

 Abnormal CRP OR abnormal ESR

1