Open Access
Table 1
Demographics and clinical data. SS: Short Stem, LS: Long Stem, SD: Standard Deviation, BMI: Body Mass Index, RT: Right, LT: Left, N: number, CCK: Constrained condylar knee, RHK: Rotating hinge knee, AORI classification: Anderson Orthopedic Research Institute bone defect classification.
| SS | LS | p-value | |
|---|---|---|---|
| Demographics | |||
| Number of patients | 110 | 124 | |
| Age (years) | p > 0.05 | ||
| Mean ± SD (min, max) | 65.96 ± 8.73 (44–85) | 67.07 ± 8.64 (40–83) | |
| Sex | p > 0.05 | ||
| Females | 74 | 72 | |
| Males | 36 | 52 | |
| BMI | p > 0.05 | ||
| Mean ± SD | 28.95 ± 4.91 | 30.88 ± 7.31 | |
| Affected side | p > 0.05 | ||
| RT | 66 | 62 | |
| LT | 44 | 62 | |
| Follow-up (mean in years) | 4.3 | 5.2 | p > 0.05 |
| Clinical data | |||
| Cause of revision | |||
| Aseptic loosening | 28 (25.45%) | 31 (25%) | |
| Infection | 28 (25.45%) | 57 (45.96%) | |
| Instability | 6 (5.45%) | 11 (8.87%) | |
| Oversizing | 13 (11.82%) | 4 (3.22%) | |
| Stiffness | 12 (10.91%) | 5 (4.03%) | |
| Malposition | 1 (0.91%) | 2 (1.61%) | |
| PF disorder | 1 (0.91%) | 0 | |
| Pain | 19 (17.27%) | 5 (4.03%) | |
| Allergy | 2 (1.82%) | 5 (4.03%) | |
| Other (Fracture) | 0 | 4 (3.22%) | |
| Total | 110 | 124 | |
| Staged revision (infections) | |||
| N | 28 | 57 | |
| One stage | 5 (18%) | 4 (7%) | |
| Two stages | 23 (82%) | 53 (93%) | |
| Pre-revision implant | |||
| Primary | 109 (99.01%) | 83 (66.94%) | |
| CCK | 1 (.09%) | 18 (14.52%) | |
| RHK | – | 16 (12.9%) | |
| Unknown | – | 7 (5.65%) | |
| AORI | |||
| I | 103 (93.63%) | 86 (69.36%) | |
| IIA | 7 (6.37%) | 31 (25%) | |
| IIB | – | 5 (4.03%) | |
| III | – | 2 (1.61%) |
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