Table 1. Demographic data and medical history.

	Patients	Male	Female	Mean age (±SD)	Familiarity with Hearing Impairment	Contralateral SPT
SD= standard deviation, SPT= stapedotomy
G1 (MatriX)	42	11	31	49,9 (±6,7)	12	15
	50%	26%	74%		28,6%	35,7%
G2 (mAXIS)	42	9	33	48,2 (±6,7)	8	10
	50%	21,4%	78,6%		19%	23,8%
Total	84	20	64	49,4 (±6,7)	20	25
	100%	26%	74%		23,8%	29,7%