Table 2.
Frequency of individual joint involvement at presentation (percentage)
| ERA N=16 | Persistent oligoarticular course N=44 | Extended oligoarticular course N=21 | RF-N=34 | polyarticular course N=55 | Total cohort N=115 | P value | |
|---|---|---|---|---|---|---|---|
|
Knee |
6 (37.5) |
32 (72.7) |
15 (71) |
24 (70) |
39(70) |
77 (66.9) |
0.06 |
|
Ankle |
5 (31.2) |
9 (20.4) |
7 (33) |
17 (50) |
24(44) |
38 (33.0) |
0.05 |
|
Subtalar |
2 (12.5) |
3 (6.8) |
3 (14.3) |
5 (14.7) |
8(14.5) |
13 (11.3) |
0.7 |
|
Hip |
5 (31.2) |
5 (11.4) |
0 (0) |
0 (0) |
0(0) |
10 (8.7) |
0.0012 |
|
Shoulder |
1 (6.2) |
1 (2.3) |
1 (4.7) |
3 (8.8) |
4(7) |
6 (5.2) |
0.63 |
|
Elbow |
1 (6.2) |
3 (6.8) |
3 (14.3) |
9 (26.5) |
12(21.8) |
16 (13.9) |
0.07 |
|
Wrist |
1 (6.2) |
4 (9.0) |
7 (33) |
13 (38.2) |
20(36.3) |
25 (21.7) |
0.038 |
|
MCP |
2 (12.5) |
3 (6.8) |
2 (9.5) |
12 (35.3) |
14(25.4) |
19 (16.5) |
0.005 |
|
PIP of Hand |
3 (18.7) |
6 (13.6) |
2 (9.5) |
18 (52.9) |
20(36.3) |
29 (25.2) |
0.0002 |
|
DIP of Hand |
2 (12.5) |
2 (4.6) |
0 (0) |
6 (17.6) |
6(10.9) |
10 (8.7) |
0.08 |
|
TMJ |
1 (6.2) |
2 (4.6) |
6 (17.6) |
6 (17.6) |
6(10.9) |
9 (7.8) |
0.07 |
|
Cervical spine |
0 (0) |
2 (4.6) |
0 (0) |
0 (0) |
1(1.8) |
2 (1.7) |
0.50 |
|
Sacroiliac |
5 (31.2) |
0 (0) |
0 (0) |
0 (0) |
0(0) |
5 (4.3) |
<0.0001 |
| Any small joint* | 6 (37.5) | 12 (27.3) | 5 (24) | 25 (73.5) | 30(54.5) | 48 (41.7) | 0.0001 |
MTP metatarsal phalangeal joint.
PIP proximal interphalangeal joint.
MCP metacarpal phalangeal joint.
DIP distal interphalangeal joint.
*any small joint refers to: PIP of hands and feet, MCP, and MTP.