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Table 3 Frequency of individual joint involvement during the course of the disease

From: Juvenile Psoriatic Arthritis (JPsA): juvenile arthritis with psoriasis?

  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
  1. MTP metatarsal phalangeal joint.
  2. PIP proximal interphalangeal joint.
  3. MCP metacarpal phalangeal joint.
  4. DIP distal interphalangeal joint.
  5. * values are shown as number with percentage in brackets.
  6. **any small joint refers to: PIP of hands and feet, MCP, and MTP.