Table 1. Factors associated with TMD symptoms in the study sample .

Factor		Clicking			Trismus			Pain about the ear			Locking			Pain on chewing
		No.	%	P*	No.	%	P*	No.	%	P*	No.	%	P*	No.	%	P*
Age/years	18-19	139	39.4	0.14	68	19.3	0.18	166	47.0	0.23	51	14.4	0.28	128	36.3	0.16
	20-21	235	42.9		137	25.0		258	47.1		85	15.5		215	39.2
	22-23	83	49.4		42	25.0		65	38.7		19	11.3		62	36.9
	24-25	12	35.3		6	17.6		14	41.2		2	5.9		7	20.6
Gender	Male	122	44.2	0.51	58	21.0	0.38	96	34.8	<0.01	42	15.2	0.59	103	37.3	0.99
	Female	347	42.0		195	23.6		407	49.2		115	13.9		309	37.4
College	Humanity	169	35.1	<0.01	91	18.9	<0.01	231	47.9	<0.01	64	13.3	<0.01	164	34.0	<0.01
	Science	73	44.8		51	31.3		94	57.7		39	23.9		90	55.2
	Health	227	49.6		111	24.2		178	38.9		54	11.8		158	34.5
Trauma	No	412	41.3	0.01	210	21.0	<0.01	435	43.6	<0.01	123	12.3	<0.01	346	34.7	<0.01
	Yes	57	54.3		43	41.0		68	64.8		34	32.4		66	62.9
Arthralgia	No	314	38.7	<0.01	154	19.0	<0.01	312	38.5	<0.01	92	11.3	<0.01	250	30.8	<0.01
	Yes	155	53.1		99	33.9		191	65.4		65	22.3		162	55.5
Stress	No	178	33.1	<0.01	84	15.6	<0.01	190	35.4	<0.01	39	7.3	<0.01	132	24.6	<0.01
	Yes	291	51.4		169	29.9		313	55.3		118	20.8		280	49.5
Family**	No	70	42.5	0.47	33	21.4	0.63	56	36.4	0.01	24	15.6	0.6	61	39.6	0.53
	Yes	399	42.0		220	23.2		447	47.1		133	14.0			37.0

* P value of Chi square, ** Living with family