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Table 1 Comparison of descriptive data among the three groups

From: Difference between medial and lateral tibia plateau in the coronal plane: importance of preoperative evaluation for medial unicompartmental knee arthroplasty

  TKA
(n = 45)
Medial UKA
(n = 80)
Early stage OA
(n = 56)
p p* p† p‡
Age (years) 71.9 ± 6.1
(52–86)
64.8 ± 6.6
(50–81)
67.7 ± 5.8
(60–84)
 < 0.01  < 0.01  < 0.01  < 0.01
BMI
(Kg/m2)
25.6 ± 2.3
(18.1–29.7)
25.2 ± 2.3
(20.6–30.3)
24.7 ± 3
(19.9–36)
0.345 0.918 0.367 1.000
mFTA(°) 6 ± 3.8
)0–10)
4.8 ± 3.1
(0–8)
4.6 ± 2.6
(0–9)
 < 0.01  < 0.01  < 0.01 1.000
0° to 5° 11 (24.4%) 30 (37.5%) 32 (57.1%)     
5° to 10° 34 (75.6%) 50 (62.5%) 24 (42.9%)     
MPTA (°) 86.2 ± 1.9
(84–90)
86.3 ± 1.7
(84–90)
86.8 ± 1.6
(82–90)
0.769 0.887 0.466 0.366
TPD (mm) 5.2 ± 2.8
(-3–9.4)
5.9 ± 2.2
(-1.5–9.8)
5.6 ± 2.4
(-2.8- 9.2)
0.882 0.949 0.883 0.972
Posterior tibia slope(°) 10.5 ± 3
(-2.2–15.3)
9.8 ± 2.7
(4.4–16.3)
10.7 ± 2.7
(4.9–16.6)
0.066    
FD (mm) 1 ± 1.4
(-1.7- 3.9)
1.3 ± 1.3
(-1.5–4.3)
1.1 ± 1.5
(-1.5–4.4)
0.74 0.982 0.643 0.457
  1. Data are mean ± standard deviation (range)
  2. TKA total knee arthroplasty, UKA unicompartmental knee arthroplasty, OA osteoarthritis, mFTA medial proximal tibial angle, MPTA mechanical femoro-tibial axis, TPD tibia plateau difference, FD difference between the medial and lateral femoral condyle levels
  3. p* p-value between TKA and medial UKA group, p† p-value between TKA and early stage OA group, p‡ p-value between medial UKA and early stage OA group