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| Genotype | Total (n) | Loss F/U (n) | Normal hearing (n) | Unilateral (n) | Bilateral (n) |
| 2 mutated GJB2 alleles | 9 | 0 | 3 | 0 | 6a |
| 1 mutated GJB2 allele | 9 | 1 | 7 | 0 | 1b |
| No mutation detected | 20 | 3 | 16 | 1c | 0 |
Including 2 babies with moderate hearing loss, 3 with mild hearing loss and 1 with slight hearing loss.
The baby revealed bilateral moderate hearing loss.
The baby revealed unilateral profound hearing loss.
