Table 1
Baseline characteristics and preoperative radiographic alignment parameters of patients who underwent TKA using patient-specific or conventional instrumentation.
| PSI (n = 41) | CI (n = 54) | p-value | |
|---|---|---|---|
| Age (years, mean ± SD) | 72.9 ± 6.3 | 73.0 ± 9.1 | 0.018** |
| Male gender (n, %) | 13 (31.7) | 17 (31.5) | 0.577* |
| BMI > 30 (n, %) | 9 (16.7) | 6 (14.6) | 0.510* |
| Valgus OA (n, %) | 4 (9.8) | 10 (18.5) | 0.157* |
| Alignment parameters (degrees, mean ± SD) | |||
| TFA | 178.31 ± 4.66 | 177.58 ± 7.78 | 0.635** |
| aLDFA | 82.03 ± 2.13 | 82.24 ± 2.42 | 0.697** |
| mPTA | 86.11 ± 3.44 | 86.64 ± 4.31 | 0.576** |
| FCTPA | 10.17 ± 7.64 | 8.70 ± 8.99 | 0.466** |
| TS | 6.06 ± 1.95 | 5.27 ± 2.08 | 0.112** |
Abbreviations: PSI: patient-specific instrumentarium; CI: conventional instrumentarium; BMI: body mass index; OA: Osteoarthritis; TFA: tibio-femoral angle; aLDFA: anatomic lateral distal femoral angle; mPTA: medial proximal tibial angle; FCTPA: femoral condylar-tibial plateau angle; TS: tibial slope; SD: standard deviation. *Comparisons by Fisher’s exact test; **Student’s t-test.
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