Table 1.

Etiology of deafness in the SSD side that received a BCI and in the contralateral side, which showed deterioration over time.

ETIOLOGY OF DEAFNESS
	BCI EAR	cHA EAR
1	TLB	PRESBYCUSIS
2	TLB	PRESBYCUSIS
3	SUDDEN DEAFNESS	UNKNOWN
4	SUDDEN DEAFNESS	PRESBYCUSIS
5	SUDDEN DEAFNESS	PRESBYCUSIS
6	UNKNOWN	PRESBYCUSIS
7	MUMPS	PRESBYCUSIS
8	TLB	PRESBYCUSIS
9	PETROSECTOMY	POST-TPL
10	TLB	PRESBYCUSIS
11	PETROSECTOMY	POST-TPL