(a) Profoundly deaf

Number	Age (years)	Sex	Cause of deafness	Hearing threshold (dB)		Age of SL (years)	Duration of deafness (years)
				Left	Right
1	17	M	Hereditary	104	106	N/A	16
2	20	M	Ototoxic drugs	110	110	6	19
3	20	M	Ototoxic drugs	84	79	8	18
4	24	M	Ototoxic drugs	119	118	13	22
5	21	F	Ototoxic drugs	112	108	10	20
6	22	F	Ototoxic drugs	118	120	11	15
7	18	F	Ototoxic drugs	119	120	7	15
8	20	M	Ototoxic drugs	110	93	9	19
9	19	F	Hereditary	109	109	N/A	18
10	20	M	Hereditary	94	93	N/A	20
11	23	F	Meningitis	103	108	6	21
12	22	F	Hereditary	81	95	N/A	22
13	21	F	Unknown	110	109	7	19
14	22	F	Ototoxic drugs	108	117	7	21
15	21	M	Ototoxic drugs	110	110	6	21
16	21	F	Meningitis	104	103	6	20
17	22	M	Ototoxic drugs	105	110	7	20
18	22	M	Ototoxic drugs	>120	109	6	21
19	21	M	Ototoxic drugs	>110	110	13	19