Table 1
NAVI and VRAS cohort characteristics.
| NAVI | VRAS | Effect size | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Characteristics | Mean ± SD n (%) | Range | Median | IQR | Mean ± SD n (%) | Range | Median | IQR | p-value | MD | 95% CI |
| Age (years) | 71.10 ± 10.68 | 45.00–84.00 | 73.00 | 69.25–76.50 | 70.80 ± 5.94 | 63.00–83.00 | 70.50 | 67.50–72.50 | n.s. | 0.3 | −7.8 to 8.4 |
| BMI (kg/m2) | 29.17 ± 4.59 | 23.80–36.00 | 28.10 | 25.45–32.13 | 28.39 ± 4.18 | 22.70–35.00 | 28.40 | 25.85–30.98 | n.s. | 0.78 | −3.3 to 5 |
| LDFA (deg.) | 90.70 ± 2.79 | 86.00–94.00 | 91.50 | 88.25–92.75 | 89.20 ± 3.65 | 84.00–95.00 | 89.00 | 87.25–90.00 | n.s. | 1.5 | −1.6 to 4.6 |
| mHKA (deg.) | 179.90 ± 6.35 | 171.00–190.00 | 178.00 | 176.50–184.25 | 182.00 ± 13.15 | 166.00–205.00 | 181.50 | 171.25–189.50 | n.s. | −2.1 | −12.1 to 7.9 |
| MPTA (deg.) | 88.40 ± 2.67 | 84.00–92.00 | 88.50 | 88.00–90.00 | 88.00 ± 2.67 | 84.00–93.00 | 88.00 | 86.25–89.75 | n.s. | .40 | −2.1 to 2.9 |
| aHKA (deg.) | −2.30 ± 3.59 | −8.00– 5.00 | −2.50 | −3.75 to −1.25 | −1.20 ± 6.12 | −11.00–9.00 | −1.50 | −4.25–2.50 | n.s. | 1.1 | −3.38 to 5.58 |
| Gender** | |||||||||||
| Women | 6 (60%) | 8 (80%) | n.s. | ||||||||
| Men | 4 (40%) | 20 (20%) | |||||||||
| Side** | |||||||||||
| Left | 7 (70%) | 4 (40%) | n.s. | ||||||||
| Right | 3 (30%) | 6 (60%) | |||||||||
| ASA Classification | |||||||||||
| I | 1 (10%) | 0 (0%) | n.s. | ||||||||
| II | 7 (70%) | 4 (40%) | |||||||||
| III | 2 (40%) | 6 (60%) | |||||||||
*Nonparametric value based on the Mann–Whitney U test. **Categorical value based on Fisher’s exact test.
Abbreviations: Navi: navigation; VRAS: Velys robotic-assisted surgery; ASA: American Society of Anesthesiologists; deg.: degrees; BMI: body mass index; SD: standard deviation; IQR: interquartile range; MD: mean difference; CI: confidence interval; MPTA: medial proximal tibial angle; mHKA: mechanical hip–knee angle; aHKA: arithmetic hip–knee angle; LDFA: lateral distal femoral angle.
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