Table 3.
Frequency of individual joint involvement during the course of the disease
| ERA N=16 | Persistent oligoarticular course N=44 | Extended oligoarticular course N=21 | RF- polyarticular N=34 | Polyarticular course N=55 | Total cohort N=115 | P value | |
|---|---|---|---|---|---|---|---|
|
Knee* |
12 (75.0) |
34 (77.2) |
18 (85.7) |
26 (76.4) |
44(80) |
90 (78.3) |
0.8 |
|
Ankle |
9 (56.0) |
20 (45.0) |
16 (76.2) |
21 (62.0) |
37(67) |
66 (57.4) |
0.1 |
|
Subtalar |
4 (25.0) |
4 (9.0) |
9 (26.5) |
7 (33.0) |
16(29) |
24 (20.1) |
0.09 |
|
Hip |
7 (43.7) |
6 (13.6) |
4 (19.0) |
5 (14.7) |
9(16.3) |
22 (19.1) |
0.05 |
|
Shoulder |
2 (12.5) |
2 (4.5) |
3 (14.3) |
8 (23.5) |
11(0.2) |
15(13.0) |
0.1 |
|
Elbow |
2 (12.5) |
6 (13.6) |
9 (43.0) |
19 (56.0) |
28(50.9) |
36 (31.0) |
0.0002 |
|
Wrist |
3 (18.7) |
13 (29.5) |
13 (61.9) |
23 (67.6) |
36(65.4) |
52 (45.2) |
0.0004 |
|
MCP |
3 (18.7) |
5 (11.4) |
9 (42.9) |
21 (61.7) |
30(54.5) |
38 (33.0) |
<0.0001 |
|
PIP of Hand |
5 (31.0) |
7 (15.9) |
12 (42.8) |
26 (76.5) |
38(69) |
51 (43.5) |
<0.0001 |
|
DIP of Hand |
3 (18.7) |
3 (6.8) |
5 (23.8) |
10 (29.4) |
15(27.2) |
21 (18.3) |
0.07 |
|
TMJ |
1 (6.2) |
5 (11.4) |
7 (33.3) |
10 (29.4) |
17(30.9) |
23 (20.0) |
0.04 |
|
Cervical spine |
0 (0) |
4 (9.0) |
3 (14.3) |
5 (14.7) |
8(14.5) |
12 (10.3) |
0.4 |
|
Sacroiliac |
7 (43.7) |
3 (6.8) |
1 (5.0) |
2 (6.0) |
3(5.4) |
13 (11.3) |
0.0002 |
| Any small joint ** | 7 (43.7) | 12 (27.2) | 3 (14.3) | 4 (11.8) | 48(87.3) | 67 (58.0) | <0.0001 |
MTP metatarsal phalangeal joint.
PIP proximal interphalangeal joint.
MCP metacarpal phalangeal joint.
DIP distal interphalangeal joint.
* values are shown as number with percentage in brackets.
**any small joint refers to: PIP of hands and feet, MCP, and MTP.