Chronic otitis media and middle ear variants: Is there relation?

Table 1 Comparison of the frequency of variants between case and control groups, n (%)

Variantsa	Case (n = 500)	Control (n = 500)	P value
Koerner’s septum +	77 (15.4)	93 (18.6)	0.178
Koerner’s septum -	423 (84.6)	407 (81.4)
Facial canal dehiscence +	193 (38.6)	206 (41.2)	0.401
Facial canal dehiscence -	307 (61.4)	294 (58.8)
High jugular bulb +	91 (18.2)	23 (4.6)	< 0.001
High jugular bulb -	409 (81.8)	477 (95.4)
Jugular dehiscence +	13 (2.6)	6 (1.2)	0.105
Jugular dehiscence -	487 (97.4)	494 (98.8)
Jugular diverticulum +	4 (0.8)	0 (0)	-
Jugular diverticulum -	496 (99.2)	0 (0)
Anterior located sigmoid sinus +	43 (8.6)	19 (3.8)	0.002
Anterior located sigmoid sinus -	457 (91.4)	481 (96.2)
Deep tympanic recess +	0 (0)	0 (0)	-
Deep tympanic recess -	500 (100)	500 (100)

^aP value was obtained from Pearson Chi Square test.

+: Indicates the presence of the variant; -: Indicates the absence of the variant.