TABLE 3.
Comparison of radiographic findings between the two groups 90 days postoperatively
| Parameter | RA‐TKA (n = 35) | CM‐TKA (n = 34) | Statistical value | p value |
|---|---|---|---|---|
| HKA angle (°) | 178.2(1.2) | 177.4(2.1) | t = 1.988 | 0.052 a |
| Outlier (n, %) | 6 (17.1%) | 12 (35.3%) | χ2 = 2.947 | 0.086 b |
| FFC angle (°) | 91.2 (1.1) | 91.6 (2.2) | t = −0.998 | 0.323 a |
| Outlier (n, %) | 2 (5.7%) | 7 (20.6%) | χ2 = 3.364 | 0.067 b |
| FTC angle (°) | 90.1 (1.5) | 90.2 (1.6) | t = 0.830 | 0.721 a |
| Outlier (n, %) | 1 (2.9%) | 3 (8.8%) | χ2 = 1.124 | 0.289 b |
| LFC angle (°) | 2.9 (2.5) | 3.4 (2.9) | t = −0.816 | 0.417 a |
| Outlier (n, %) | 14 (42.4%) | 19 (55.9%) | χ2 = 1.214 | 0.271 b |
| LTC angle (°) | 87.1 (1.2) | 85.5 (2.2) | t = 3.517 | 0.001 a |
| Outlier (n, %) | 1 (3.0%) | 10 (29.4%) | χ2 = 9.075 | 0.003 b |
Abbreviations: CM‐TKA, conventional manual total knee arthroplasty; FFC, frontal femoral component; FTC, frontal tibial component; HKA, hip‐knee‐ankle; LFC, lateral femoral component; LTC, lateral tibial component; RA‐TKA, robot‐assisted total knee arthroplasty; TKA, total knee arthroplasty
a
Student's t‐test
b
Pearson chi‐square test.