Participation in school and physical education in juvenile idiopathic arthritis in a Nordic long-term cohort study

Table 4 Participation in physical education (PE) in 242 children at the eight-year study visit in the Nordic juvenile idiopathic arthritis (JIA) cohort according to different JIA categories

JIA categories	Full PE (n = 194)	No or partly PE (n = 48)	OR (95% CI)^a	P-value
JIA categories	n (%)	n (%)	OR (95% CI)^a	P-value
Oligoarticular persistent	73 (93.6)	5 (6.4)	n.a	n.a
Oligoarticular extended	33 (78.6)	9 (21.4)	4.0 (1.2–12.8)	0.020
Polyarticular RF negative	39 (78.0)	11 (22.0)	4.1 (1.3–12.7)	0.014
Polyarticular RF positive	0	0	n.a	n.a
Systemic arthritis	5 (83.3)	1 (16.7)	2.9 (0.3–30.0)	0.367
Psoriatic arthritis	10 (83.3)	2 (16.7)	2.9 (0.5–17.1)	0.235
Enthesitis-related arthritis	13 (65.0)	7 (35.0)	7.9 (2.2–28.6)	0.002
Undifferentiated arthritis	21 (61.8)	13 (38.2)	9.0 (2.9–28.3)	< 0.001

^aUnivariate regression analysis with oligoarticular persistent arthritis as a reference category. OR Odds ratio, CI Confidence interval, RF Rheumatoid factor, n.a Not applicable

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