Patients who aged≥6 years and had hearing loss due to GJB2 or SLC26A4 mutation from the Chinese Deafness Genome Project between January 2020 and December 2023 were included. A total of 43 patients with GJB2 mutation were detected, including 25 males and 18 females, with a mean age of (20.4±11.4) years. There were 20 patients with SLC26A4 mutation, including 9 males and 11 females, with a mean age of (15.7±9.1) years. The mean hearing threshold of GJB2 and SLC26A4 mutation patients was 54.1 (95%: 49.1-59.1) decibel hearing level (dB HL) and 66.1 (95%: 58.6-73.6) dB HL, respectively. The hearing threshold of GJB2 and SLC26A4 mutation patients increased at a rate of 0.21 (95%:-0.15-0.57) dB HL/year and 2.22 (95%: 1.46-2.99) dB HL/year, respectively. The current study indicates that patients with SLC26A4 mutation show a progressive trend of hearing decline with the increase of age.
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