Table 4.

Summary of multivariable logistic regression analyses for outcome variables

	Symptom present	p value	Patient-reported pain present	p value	Clinical finding present	p value	Clinically observed disturbance of mandibular movement present	p value
	OR (95% CI)		OR (95% CI)		OR (95% CI)		OR (95% CI)
Type of JIA
Oligoarthritis	2.29 (0.64, 8.17)	0.203	2.83 (0.78, 10.29)	0.115	1.15 (0.12, 11.00)	0.902	1.64 (0.41, 6.57)	0.483
Seronegative polyarthritis	ref		ref		ref		ref
Sex
Girls	3.37 (0.69, 16.42)	0.133	2.80 (0.58, 13.62)	0.202	ref		ref
Boys	ref		ref		1.03 (0.05, 21.91)	0.983	1.18 (0.22, 6.36)	0.846
Age group at diagnosis of JIA (years)
< 5.3	ref		ref		ref		ref
≥ 5.3	1.28 (0.41, 3.99)	0.677	1.72 (0.54, 5.44)	0.356	3.97 (0.31, 50.79)	0.289	1.69 (0.49, 6.34)	0.440
Delay from diagnosis of JIA to diagnosis of TMJ symptoms and/or signs (weeks)
< 33.0	1.26 (0.36, 4.50)	0.718	1.19 (0.33, 4.30)	0.792	5.68 (0.38, 85.47)	0.209	2.19 (0.53, 9.02)	0.279
≥ 33.0	ref		ref		ref		ref
Anti-nuclear antibody (ANA)a
Positive	ref		ref		1.77 (0.11, 28.09)	0.685	3.43 (0.79, 14.81)	0.099
Negative	4.88 (1.29, 18.41)	0.019	4.56 (1.21, 17.19)	0.025	ref		ref
Human leucocyte antigen B27 (HLA-B27)b
Positive	1.09 (0.29, 4.10)	0.894	1.33 (0.35, 5.13)	0.680	ref		ref
Negative	ref		ref		7.22 (0.57, 90.85)	0.126	1.23 (0.25, 6.08)	0.798
Medication at the time of TMJ involvement
Yes	1.73 (0.34, 8.71)	0.508	1.53 (0.29, 7.99)	0.615	NA		ref
No	ref		ref				2.12 (0.19, 23.22)	0.537

^aMissing n = 0

^bMissing n = 3

JIA juvenile idiopathic arthritis

TMJ temporomandibular joint

OR odds ratio

CI confidence interval

NA Not applicable

ref reference