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Numbers of records in the implant recipient observational study (IROS) database for unilateral cochlear implants (CI) subjects meeting the inclusion criteria.
| Number (%) of subjects by age range at each visit | ||||||
|---|---|---|---|---|---|---|
| Interval | All | [18–34] | [35–44] | [45–54] | [55–64] | [65–93] |
| Baseline | 543 | 81 (15%) | 80 (15%) | 94 (17%) | 120 (22%) | 168 (31%) |
| 1-year | 416 | 66 (16%) | 61 (15%) | 71 (17%) | 93 (22%) | 125 (30%) |
| 2-year | 305 | 49 (16%) | 49 (15%) | 50 (17%) | 69 (23%) | 88 (29%) |
| 3-year | 154 | 28 (18%) | 25 (16%) | 26 (17%) | 38 (25%) | 37 (24%) |
