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

Table 1

Comparison of temporal bone pneumatization grade between left and right ears in control group.

Pneumatization grade	Side (number of ears)		Statistical analysis
	Left	Right
I	8	8	2.526	0.471
II	22	31
III	67	74
IV	205	189
Total	302	302