Table 1 Rheumatoid arthritis severity index

Surgery subscale:

C1–C2 fusion

3 points

Any hand joint

1 point

Any foot joint

1 point

Major joints

1 point each

(hips, knees, shoulder, elbow, wrist, ankle)

(maximum of 2)

Maximum score for category:

5 points

X-ray subscale:

C1–C2 subluxation

3 points

Any erosions

1 point

Maximum score for category:

4 points

Extra-articular manifestations subscale:

Vasculitis

1 point

Pulmonary lung nodule

1 point

Maximum score for category:

1 point

Clinical status subscale:

Arthritis flares

1

1 point

2–4

2 points

5+

3 points

Worst physician global rating: "doing poor"

2 points

Functional status

Unable to do hobbies

1 point

Unable to work

2 points

Unable to care for self

3 points

Hours of morning stiffness <1

0 points