Table 2.

Positive results of different tests in AN/non-AN groups.

Group	pathol	MRI	speech	oculom	calori	vestib
AN	60	42	56	33	47	51
non-AN	23	11	10	4	12	10

pathol, the final pathological result after surgery; MRI, MRI result before surgery; speech, audiometry before surgery; oculom, including saccade test, smooth pursuit test, optokinetic test, gaze test, and spontaneous nystagmus; calori, caloric test before surgery; vestib, vestibular function impairment before surgery.