Hearing Phenotypes of Patients with Hearing Loss Homozygous for the GJB2 c.235delc Mutation

Table 6

Types of audiograms in patients (both ears) with different age groups.

Age	Types of audiograms
	Descending	Flat	Residual	Valley like	Ascending	Total deafness	Other
Group 1	56 (17.95%)	89 (28.53%)	53 (16.99%)	20 (6.41%)	7 (2.24%)	23 (7.37%)	64 (20.51%)
Group 2	32 (55.17%)	11 (18.97%)	2 (3.45%)	5 (8.62%)	2 (3.45%)	0	6 (10.34%)
Group 3	21 (61.76%)	5 (14.71%)	3 (8.82%)	0	0	1 (2.94%)	4 (11.76%)
Group 4	42 (50.00%)	14 (16.67%)	17 (20.24%)	1 (11.90%)	1 (11.90%)	3 (3.57%)	6 (7.14%)

Group 1 (≤6 years old), group 2 (6.1–12 years old), group 3 (12.1–18 years old), and group 4 (≥18 years old). The value outside each pair of parentheses represents the number of ears with this type of audiogram; the value inside each pair of parentheses represents the percentage of ears with this type of audiogram relative to the total number of ears in each group.