Open Access
Table 1
Patients’ characteristics and perioperative data of the study population.
| Group NS | Group OS | Group SS | Total | p | |
|---|---|---|---|---|---|
| No stem | Offset stem | Straight stem | (n = 789) | ||
| (n = 92) | (n = 88) | (n = 609) | |||
| Gender, n (%) | 0.375 | ||||
| Male | 36 (39.1) | 28 (31.8) | 241 (39.6) | 305 (38.7) | |
| Female | 56 (60.9) | 60 (68.2) | 368 (60.4) | 484 (61.3) | |
| Age, years, mean (±SD) | 74.3 (11.4) | 68.7 (7.9) | 73.1 (10.6) | 72.7 (10.2) | <0.001#,* |
| Etiology of revision, n (%) | 0.052 | ||||
| Periprosthetic fracture | 0 (0) | 0 (0) | 19 (3.1) | 19 (2.4) | |
| Infection | 31 (33.7) | 20 (22.7) | 200 (32.8) | 251 (31.8) | |
| Aseptic loosening | 29 (31.6) | 32 (36.4) | 165 (27.1) | 226 (28.6) | |
| Malposition | 9 (9.8) | 11 (12.5) | 84 (13.8) | 104 (13.2) | |
| Laxity | 11 (12) | 6 (6.8) | 53 (8.7) | 70 (8.9) | |
| Stiffness | 4 (4.3) | 6 (6.8) | 51 (8.4) | 61 (7.7) | |
| Pain | 4 (4.3) | 7 (8) | 21 (3.5) | 32 (4.1) | |
| PE wear | 0 (0) | 0 (0) | 3 (0.5) | 3 (0.4) | |
| Patella issues | 0 (0) | 0 (0) | 2 (0.3) | 2 (0.3) | |
| Allergy | 4 (4.3) | 6 (6.8) | 11 (1.8) | 21 (2.7) | |
| Constraint, n (%) | <0.001 | ||||
| No constraint | 92 (100) | 8 (9.1) | 162 (26.6) | 262 (33.2) | |
| CCK | 0 (0) | 79 (89.8) | 174 (28.6) | 253 (32.1) | |
| Hinged | 0 (0) | 1 (1.1) | 273 (44.8) | 274 (34.7) | |
| TT osteotomy, n (%) | 0 (0) | 21 (23.9) | 148 (24.3) | 169 (21.4) | <0.001#,^ |
| Tibial stem, n (%) | 0 (0) | 88 (100) | 609 (100) | 697 (88.3) | <0.001#,^ |
| Femoral stem, n (%) | 0 (0) | 87 (98.9) | 497 (81.6) | 584 (74) | <0.001#,^ |
| Length of stem | <0.001 | ||||
| No stem | 92 (100) | 0 (0) | 0 (0) | 92 (11.7) | |
| Metaphyseal, 30–75 mm | 0 (0) | 5 (5.7) | 165 (27.1) | 170 (21.5) | |
| Diaphyseal, > 75 mm | 0 (0) | 83 (94.3) | 444 (72.9) | 527 (66.8) |
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