Table 2: Comparison in the KOOS Subscales Between Patients who Received the e.motion® UC Knee Prosthesis and Patients who Received the LCS Prosthesis (Lygre et al., 2010)

e.motion® UC Prosthesis (Follow-Up: 5.6 Years) LCS Prosthesis Difference Between Prostheses
Resurfaced (N=12) Non-Resurfaced (N=16) Weighted Mean (N=28) Resurfaced (N=184)1 Non-Resurfaced (N=180)1 Weighted Mean (N= 364) (e.motion® – LCS), Weighted Means2
Mean ± SE Mean ± SE Mean ± SE Mean ± SE
ADL 77,5 ± 18,7 78,1 ± 15,8 77,8 70,8 ± 1,9 71,6 ± 2,1 71,2 6,6
Pain 83,1 ± 22,9 84,9 ± 13,9 84,1 76,1 ± 1,8 75,8 ± 2 76 8,1
Symptoms 82,1 ± 19,9 86,6 ± 11,9 84,7 78 ± 1,5 79,9 ± 1,5 78,9 5,8
Sports 37,1 ± 21,2 37,8 ± 38,6 37,5 35,9 ± 2,3 38,3 ± 2,6 37,1 0,4
QoL 70,8 ± 23 73,8 ± 19,1 72,5 59,6 ± 2,3 62,3 ± 2,3 60,9 11,6

SE: standard error; UC: ultra-congruent; LCS: low-contact stressThe Knee injury and Osteoarthritis Outcome Score (KOOS) is a 42-item self‑administered questionnaire that covers 5 dimensions: pain (“Pain”, 9 items), other disease‑specific symptoms (“Symptoms”, 7 items), activities of daily living (“ADL”, 17 items), sport and recreation function (“Sports”, 5 items), and knee-related quality of life (“QoL”, 4 items).
1 Data kindly provided by Dr Lygre (Publication: Lygre SH, Espehaug B, Havelin LI, Vollset SE, Furnes O. Does patella resurfacing really matter? Pain and function in 972 patients after primary total knee arthroplasty. An observational study from the Norwegian Arthroplasty Register. Acta Orthop. 2010; 81 (1): 99-107.)
2 Weighted mean = ((mean resurfaced *184)+(mean non-resurfaced*180))/364.