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Demographic data summarizing study population
| Group (no. subjects) | Age range at implantation, yr | Mean age at implantation, yr | Mean current age, yr | Mean years of implant use | Mean follow-up, mo |
|---|---|---|---|---|---|
| 1 (13) | 75–89 | 80.7 | 85.7 | 5.3 | 41.1 (SD, 30.3) |
| 2 (15) | 65–78 | 71.6 | 77.7 | 6.9 | 46.6 (SD, 47.3) |
| Total = 28 | 75.8 | 81.2a | 6.1 | 44.1 |
Two patients died during the course of the study period.
