Table 1.
Patient demographics
| Variable | Genesis® II | NexGen® | Optetrak® | p value |
|---|---|---|---|---|
| Total number of patients | 58 | 113 | 103 | |
| Number of females | 28 (49.1%) | 66 (58.4%) | 67 (65.0%) | 0.144 |
| Age (years)* | 65.7 (± 12.2) | 65.2 (± 10.4) | 64.4 (± 11.8) | 0.778 |
| Length of implantation (years)* | 1.44 (± 1.48) | 2.14 (± 2.05) | 2.60 (± 2.58) | 0.006 |
| Range 0.02–8.01 | Range 0.04–11.00 | Range 0.03–10.13 | ||
| Side (number of patients) | ||||
| Left | 28 (48.3%) | 49 (43.4%) | 53 (51.5%) | 0.488 |
| Right | 30 (51.7%) | 64 (56.6%) | 50 (48.5%) | |
| Body mass index* | 30.9 (± 7.0) | 30.1 (± 6.7) | 32.0 (± 6.4) | 0.111 |
| Reason for revision (number of patients) | ||||
| Infection | 19 (34%) | 39 (35%) | 34 (35%) | 0.331 |
| Loosening | 7 (12%) | 21 (19%) | 15 (15%) | |
| Instability | 11 (20%) | 28 (25%) | 22 (23%) | |
| Stiffness | 11 (20%) | 19 (17%) | 14 (14%) | |
| Miscellaneous | 8 (14%) | 4 (4%) | 13 (13%) | |
* Values are expressed as mean (± SD).