Juvenile idiopathic arthritis and the temporomandibular joint

Available online 1 February 2012

Peer review under responsibility of Alexandria University Faculty of Medicine.

Figures & data

Table 1 Demographic, clinical and laboratory characteristics of juvenile idiopathic arthritis patients.

Age (years)	14.1 ± 2.3
Age at disease onset (years)	9.3 ± 2.8
Disease duration (years)	4.8 ± 2.4
Disease activity score	3.3 ± 1.1
Child health assessment questionnaire	0.92 ± 0.45
Pain score	1.4 ± 0.59
Maximal interincisal opening (mm)	43.3 ± 5.05
C-reactive protein (mg/ml)	21.4 ± 11.2
Erythrocyte sedimentation rate (mm/h)	62.9 ± 37.6

Values are in mean ± SD.

Table 2 Comparison between JIA patients with active and inactive disease regarding clinical, laboratory and MRI scores.

	Active disease no.^a (28)	Inactive disease no.^a (12)	p
C-HAQ^b	1.1 ± 0.35	0.44 ± 0.20	0.000^*
Pain score	1.6 ± 0.52	0.85 ± 0.21	0.000^*
MIO^c (mm)	40.8 ± 3.4	49.0 ± 3.1	0.000^*
CRP^d (mg/ml)	27.7 ± 6.4	6.5 ± 0.66	0.000^*
ESR^e (mm/h)	82.8 ± 25.9	16.4 ± 3.1	0.000^*
Synovial enhancement score	3.2 ± 0.92	0.66 ± 0.98	0.000^*
Effusion score	2.0 ± 1.3	0.0 ± 0.0	0.000^*
Pannus score	0.85 ± 1.3	0.0 ± 0.0	0.032^**
Erosion score	0.67 ± 1.1	0.0 ± 0.0	0.033^**
Total MRI^f score	7.0 ± 3.4	0.66 ± 0.98	0.000^*

a Number.

b Child health assessment questionnaire, MIO.

c Maximal interincisal opening.

d C-reactive protein.

e Erythrocyte sedimentation rate.

f Magnetic resonance imaging.

* Highly significant.

** Significant, values are in mean ± SD.

Table 3 Clinical, laboratory and MRI parameters in different subtypes of JIA patients.

	Systemic JIA^a no.^d (6)	Polyart^b JIA no. (27)	Oligoart^c JIA no. (7)	p
Disease activity score	4.3 ± 0.51	3.4 ± 0.97	2.0 ± 0.0	0.000^*
C-HAQ^e	1.3 ± 0.25	0.96 ± 0.41	0.42 ± 0.26	0.000^*
Pain score	1.8 ± 0.65	1.5 ± 0.51	0.72 ± 0.16	0.000^*
MIO^f (mm)	37.3 ± 0.51	42.9 ± 4.0	49.8 ± 2.9	0.000^*
CRP^g (mg/ml)	35.0 ± 1.7	22.1 ± 9.2	6.7 ± 0.48	0.000^*
ESR^h (mm/h)	106.3 ± 32.1	65.4 ± 29.8	16.0 ± 3.8	0.000^*
Synovial enhancement score	4.0 ± 0.0	2.6 ± 1.5	1.1 ± 1.1	0.003^**
Effusion score	3.3 ± 0.51	1.3 ± 1.3	0.0 ± 0.0	0.000^*
Pannus score	2.6 ± 1.3	0.29 ± 0.72	0.0 ± 0.0	0.000^*
Erosion score	2.3 ± 1.0	0.18 ± 0.39	0.0 ± 0.0	0.000^*
Total MRI^i score	12.3 ± 1.8	4.5 ± 2.9	1.1 ± 1.1	0.000^*

a Juvenile idiopathic arthritis.

b Polyarticular.

c Oligoarticular.

d Number.

e Child health assessment questionnaire.

f Maximal interincisal opening.

g C-reactive protein.

h Erythrocyte sedimentation rate.

i Magnetic resonance imaging.

* Highly significant.

** Significant, values are in mean ± SD.

Table 4 The correlation between MIO and different disease parameters in patients with JIA.

	MIO^a^,^*
Disease activity score	r	−0.85
C-HAQ^b	r	−0.84
Pain score	r	−0.72
C-reactive protein	r	−0.87
Synovial enhancement score	r	−0.74
Total MRI^c score	r	−0.80

a MIO: maximal interincisal opening.

b C-HAQ: child health assessment questionnaire.

c MRI: magnetic resonance imaging.

* Highly significant.

Table 5 The correlation between total MRI score and disease variables in patients with JIA.

	Total MRI score^a^,^*
Disease activity score	r	0.81
C-HAQ^b	r	0.74
Pain score	r	0.72
C-reactive protein	r	0.88

a MRI: magnetic resonance imaging.

b C-HAQ: child health assessment questionnaire.

* Highly significant.