Table 1.
Patient characteristics
| Patient characteristics | |||
| Male | 71 | 43% | |
| Female | 93 | 57% | |
| Mean age at implantation | 62 | SD (14) | |
| Audiometric characteristics | |||
| Pre-implantation hearing aid use, N (%) | Ear to be implanted: 55 (34%) | Contralateral ear: 34 (21%) | |
| Mean thresholds (dB HL) pre-implantation (SD) | |||
| PTA3 (mean threshold 0.5, 1,2 kHz) | 99 (14) | 92 (18) | |
| PTA4 (mean threshold 0.5, 1, 2, 4 kHz) | 102 (13) | 95 (17) | |
| Etiology | |||
| Unknown | 72 | ||
| Congenital hearing loss (incl. rhesus antagonism1, Rubella2) | 4 | ||
| Syndromal hearing loss (Crest8, Melas1, Meniere5, Usher7) | 22 | ||
| Hereditary | 52 | ||
| Acquired (meningitis1, otitis1, ototoxic medication2, meningioma2, trauma1, otosclerosis2, sudden deafness4, mumps virus1) | 14 | ||