Table 3.

Comparison between magnetic resonance imaging variables in groups measured categorically.

		wTMD group		pTMD group		iTMD group
		n = 76	Column (%)	n = 58	Column (%)	n = 85	Column (%)	p-Value	Post hoc analysis
Effusion	No	72	94.74	47	81.03	70	82.35	0.029	wTMD–pTMD
	Yes	4	5.26	11	18.97	15	17.65		wTMD–iTMD
ADDWR	No	45	59.21	38	65.52	56	65.88	0.634	n.s.
	Yes	31	40.79	20	34.48	29	34.12
ADDWoR	No	48	63.16	36	62.07	37	43.53	0.021	wTMD–pTMD
	Yes	28	36.84	22	37.93	48	56.47		pTMD–iTMD
Disk deformity	No	39	51.32	36	62.07	57	67.06	0.119	wTMD–iTMD
	Yes	37	48.68	22	37.93	28	32.94
Condylar degeneration	No	44	57.89	36	62.07	52	61.18	0.867	n.s.
	Yes	32	42.11	22	37.93	33	38.82
VC of LPM	No	39	51.32	36	62.07	57	67.06	0.049	wTMD–iTMD
	Yes	37	48.68	22	37.93	28	32.94
SC of LPM	No	45	59.21	31	53.45	53	62.35	0.777	n.s.
	Yes	31	40.79	27	46.55	32	37.65

p-Value was obtained from χ² test and the mean difference between groups was obtained from post hoc analysis with Boneferroni test. p-Value significance was set at <0.05.

ADDWR, anterior disk displacement with reduction; ADDWoR, anterior disk displacement without reduction; VC, volume change; SC, signal change; LPM, lateral pterygoid muscle; wTMD–pTMD, when the proportion of the presence of variable was significantly different between wTMD and pTMD groups; wTMD–iTMD, when the proportion of the presence of variable was significantly different between wTMD and iTMD groups; pTMD–iTMD, when the proportion of the presence of variable was significantly different between pTMD and iTMD groups; n.s., when there was no significant difference between groups.