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Table 4 Comparison of patient-reported outcome measures

From: Robotics versus personalized 3D preoperative planning in total knee arthroplasty: a propensity score-matched analysis

  3D preoperative planning group
(n = 104)
Robotics group
(n = 52)
P value
KSS Knee scores (100points)
Pre-op 60.2 ± 18.2 61.2 ± 16.2 0.745
3 months 83.9 ± 9.3 84.4 ± 8.0 0.741
6 months 92.3 ± 9.4 93.0 ± 8.0 0.681
12 months 95.9 ± 8.8 96.8 ± 6.1 0.473
Function scores (100points)
Pre-op 43.9 ± 21.2 44.6 ± 20.6 0.851
3 months 65.5 ± 10.2 66.9 ± 9.9 0.418
6 months 92.0 ± 13.2 93.4 ± 10.7 0.509
12 months 96.8 ± 14.0 98.6 ± 9.1 0.406
Total score (200points)
Pre-op 104.1 ± 30.5 105.8 ± 33.1 0.758
3 months 149.4 ± 17.4 151.3 ± 15.5 0.508
6 months 184.3 ± 21.0 186.3 ± 16.7 0.546
12 months 192.6 ± 22.4 195.4 ± 14.6 0.421
WOMAC Pain (100points)
Pre-op 63.7 ± 18.1 63.0 ± 15.7 0.807
3 months 84.8 ± 12.9 86.4 ± 11.8 0.457
6 months 91.1 ± 11.5 90.3 ± 13.6 0.712
12 months 96.2 ± 6.3 95.8 ± 7.7 0.740
Stiffness (100points)
Pre-op 69.8 ± 23.7 71.2 ± 22.9 0.740
3 months 81.7 ± 12.7 81.5 ± 12.5 0.911
6 months 87.5 ± 17.2 85.6 ± 18.4 0.522
12 months 95.0 ± 9.3 95.0 ± 9.3 1.000
Function (100points)
Pre-op 62.5 ± 14.9 62.1 ± 15.7 0.865
3 months 89.6 ± 8.7 89.1 ± 9.3 0.716
6 months 92.5 ± 10.7 92.2 ± 11.8 0.875
12 months 97.5 ± 5.4 97.1 ± 7.0 0.697
Total score (100points)
Pre-op 65.4 ± 15.7 65.4 ± 15.0 0.984
3 months 85.4 ± 9.0 85.6 ± 9.0 0.863
6 months 90.3 ± 11.9 89.4 ± 13.5 0.639
12 months 96.2 ± 5.5 95.9 ± 6.6 0.794
  1. KSS, Knee Society Score; WOMAC, Western Ontario and McMaster Universities Osteoarthritis Index. The t test was used for all