Temporal Bone Pneumatization and Pulsatile Tinnitus Caused by Sigmoid Sinus Diverticulum and/or Dehiscence

Table 3

Comparison of temporal bone pneumatization grade between the PT and control groups.

Pneumatization grade	Group (number of ears)		Statistical analysis
	PT side	Control
I	1	16	3.986	0.263
II	18	53
III	53	141
IV	127	394
Total	199	604

PT: pulsatile tinnitus.