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Table 2 Imaging data of three groups of patients

From: The influence of posterior tibial slope on the mid-term clinical effect of medial-pivot knee prosthesis

  Group A (n = 68) Group B (n = 83) Group C (n = 82) Z value P value
Preoperative PCO (mm) 24.27 ± 3.01 24.39 ± 3.04 24.41 ± 2.76 0.019 0.991
Postoperative PCO (mm) 25.69 ± 2.71 25.87 ± 2.91 26.03 ± 3.25 0.077 0.962
Change of PCO (mm) 1.42 ± 2.13 1.47 ± 2.03 1.62 ± 2.47 0.209 0.901
Preoperative joint line (mm) 16.38 ± 3.76 16.71 ± 3.06 16.56 ± 3.83 0.410 0.815
Postoperative joint line (mm) 17.06 ± 2.97 17.71 ± 2.98 17.20 ± 2.82 1.529 0.465
Change of joint line (mm) 0.68 ± 3.19 1.00 ± 2.86 0.64 ± 3.47 0.996 0.608