Table 1 Clinical presentations and diagnoses
| Â | Total (n) | Mutation detection (n) | Detection rate (%) | Diagnosis (n) | Diagnosis rate (%) |
|---|---|---|---|---|---|
All cases | 52 | 30 | 58 | 21 | 40 |
Gender | |||||
 Male | 20 | 15 | 75 | 13 | 65 |
 Female | 32 | 15 | 47 | 8 | 25 |
Genetic testing | |||||
 First (Invader assay+direct sequencing) | 52 | 11 | 21 | 9 | 17 |
 Second (TaqMan genotyping assay) | 43 | 7 | 16 | 4 | 9 |
 Third (Targeted exon sequencing using MPS) | 39 | 16 | 41 | 8 | 21 |
Inheritance mode | |||||
 Autosomal dominant | 12 | 8 | 67 | 6 | 50 |
 Autosomal recessive | 5 | 3 | 60 | 3 | 60 |
 Sporadic | 35 | 19 | 54 | 12 | 34 |
Age of onset | |||||
 Congenital | 32 | 20 | 63 | 14 | 43 |
 Childhood (<17) | 16 | 7 | 44 | 5 | 31 |
 Adult (>18) | 4 | 3 | 75 | 2 | 50 |
Type of hearing loss | |||||
 Mild–moderate | 21 | 9 | 43 | 6 | 29 |
 Severe–profound | 31 | 21 | 68 | 15 | 48 |
 Symmetric | 44 | 28 | 64 | 20 | 45 |
 Asymmetric | 8 | 2 | 25 | 1 | 13 |