Table 4.

Frequency (%) of limitations in physical function assessed with the Graded Chronic Pain Scale (GCPS) and jaw function assessed with the Jaw Disability Checklist (JDL) as well as mean (SD) maximum voluntary mouth opening (MVO) in 124 children with a TMD diagnosis and 332 children without a TMD-diagnosis from a general population in Jeddah, Saudi Arabia

	TMD total	Myofascial pain		Arthralgia	Osteoarthrosis	DDWR	Non-TMD
	n = 124	Ia. n = 71	Ib. n = 14	n = 22	n = 12	n = 32	n = 332
GCPS
Grade 0	34.7	14.1	7.1	50	75	56.3	85.8
Grade 1	29.8	46.5	21.4	9.1	8.3	18.8	9.0
Grade 2	29.0	29.6	71.4	36.4	8.3	18.8	3.6
Grade 3	5.7	8.5	0	4.6	8.3	3.1	1.5
Grade 4	0.8	1.4	0	0	0	3.1	0
Jaw disability (JDL)
Chewing	42	41	57	38	33	22	27
Drinking	2.4	1.5	7	7.7	0	6	7
Exercising	33	38	14	23	100	12	27
Yawning	38	41	28	69	22	22	18
Eating hard foods	61	64	50	69	25	31	45
Eating soft foods	6.8	4.6	14	7.7	0	6	9
Swallowing	10	11	7	15	0	3	5
Smiling/laughing	46	51	36	31	17	25	20
Talking	24	23	28	23	25	25	16
Cleaning teeth/face	21	23	21	31	8	12	9
Having usual facial appearance	53	44	36	38	22	22	69
MVO (mm)
With pain	49.7 (7.4)	50.3 (7.7)	42.0 (7.2)	52.0 (5.5)	49.6 (5.7)	50.7 (6.3)	49.7 (6.1)
Without pain	43.0 (8.0)	44.8 (6.0)	29.0 (6.0)	44.5 (9.2)	42.5 (7.0)	43.4 (9.2)	44.2 (7.4)

Ia Myofascial pain, Ib Myofascial pain with limited opening, DDWR Disc displacement with reduction

SD Standard deviation

The results for GCPS and JDL are presented for the Non-TMD group since all children completed the RDC/TMD questionnaire before the clinical examination and diagnostics

The bold figures denote significant differences compared to the Non-TMD group? (p < 0.05)