Mandibular range of motion in children with juvenile idiopathic arthritis with and without clinically established temporomandibular joint involvement and in healthy children; a cross-sectional study

de Sonnaville, Willemijn F. C.; Speksnijder, Caroline M.; Zuithoff, Nicolaas P. A.; Verkouteren, Daan R. C.; Wulffraat, Nico W.; Steenks, Michel H.; Rosenberg, Antoine J. W. P.

doi:10.1186/s12969-021-00583-5

Pediatric Rheumatology

Table 4 Adjusted linear regression for mandibular range of motion in children with JIA and healthy children

From: Mandibular range of motion in children with juvenile idiopathic arthritis with and without clinically established temporomandibular joint involvement and in healthy children; a cross-sectional study

Model 1: Children with JIA vs healthy children
	AMIO		PMIO		Protrusion		Discrepancy in laterotrusion:
Variable	Regression coefficients (95% CI)	*P-value*	Regression coefficients (95% CI)	*P-value*	Regression coefficients (95% CI)	*P-value*	Regression coefficients (95% CI)	*P-value*
JIA vs healthy children	−3.57 (− 4.85 – − 2.28)	0.000	−3.71 (− 5.09 – − 2.33)	0.000	−1.03 (1.46 – − 0.60)	0.000	0.68 (0.47–0.89)	0.000
Male gender	1.35 (2.61–0.09)	0.035	0.73 (− 0.61–2.06)	0.284	0.14 (− 0.29–0.56)	0.525	−0.15 (− 0.06–0.35)	0.171
Length	0.14 (0.10–0.17)	0,000	0.14 (0.11–0.18)	0.000	0.02 (0.01–0.03)	0.005	0.00 (−0.01–0.01)	0.905
Intercept	32.51 (27.31–37.71)		32.72 (27.29–38.14)		7.23 (5.47–9.00)		−0.54 (−1.41 – − 0.33)
R²	0.19		0.18		0.06		0.10
Model 2: Children with JIA with vs without TMJ involvement
	AMIO		PMIO		Protrusion		Discrepancy in laterotrusion:
Variable	Regression coefficients (95% CI)	*P-value*	Regression coefficients (95% CI)	*P-value*			Regression coefficients (95% CI)	*P-value*
JIA vs healthy children	−1.61 (−2.89 – −0.34)	0.013	−2.09 (−3.49 – − 0.70)	0.003	− 0.94 (− 1.40– -0.48)	0.000	0.58 (0.35–0.80)	0.000
JIA with vs without TMJ involvement	−6.67 (−8.17 – −5.14)	0.000	−5.59 (− 7.21 – −3.97)	0.000	− 0.31 (− 0.86–0.25)	0.283	0.36 (0.09–0.62)	0.008
Male gender	1.12 (−0.05–2.30)	0.060	0.53 (−0.75–1.80)	0.418	0.13 (−0.30—0.55)	0.564	−0.13 (− 0.34–0.08)	0.212
Length	0.15 (0.12–0.18)	0.000	0.16 (0.12–0.19)	0.000	0.02 (0.01–0.03)	0.004	0.00 (−0.01–0.01)	0.873
Intercept	28.29 (23.36–33.22)		29.07 (23.79–34.33)		7.04 (5.24–8.84)		−0.32 (−1.20–0.57)
R²	0.30		0.26		0.07		0.11

AMIO active maximum interincisal opening; CI confidence interval; JIA juvenile idiopathic arthritis; PMIO passive maximum interincisal opening; TMJ temporomandibular joint
*Discrepancy in laterotrusion was defined as the difference in laterotrusion (in millimeters) between the left and right side. TMJ involvement is proposed as a TMJ protocol score ≥ 2 in JIA patients

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ISSN: 1546-0096

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