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Table 2 Joint involvement in juvenile idiopathic arthritis (JIA) subtypes in Omani children (N = 107)

From: Epidemiology of juvenile idiopathic arthritis in Oman

Joint involved Systemic (n = 19) Oligo JIA (n = 34) Poly RA + ve (n = 8) Poly RA – ve (n = 42) ERA (n = 3)
SI 0 0 0 3 1
Hip 2 0 0 4 3
Knee 10 29 8 39 3
Ankle 12 9 7 32 3
MTP 1 1 5 15 0
Spine 0 1 1 6 1
TMJ 0 0 1 2 0
Shoulder 1 1 0 1 0
Elbow 8 1 4 23 0
Wrist 7 3 8 33 0
MCP 1 0 4 20 0
PIP 2 2 4 15 0
DIP 0 0 0 4 0
  1. Oligo oligoarticular, Poly RF polyarticular rheumatoid factor, ERA enthesitis-related arthritis, SI sacroiliac, MTP metatarsophalangeal joint, TMJ temperomandibular, MCP metacarpophalangeal joint, PIP proximal interphalangeal joint, DIP distal interphalangeal joint
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