Table 2.

Clinical outcomes at minimum 10 years.

	Primary Group (n=15)	Revision Group (n=24)	p-Value
Follow-up time [yrs] mean ± SD/(range) median/(IQR) distribution	11.2 ± 0.7/(10.2 -12.5) 11.2/(10.7 - 11.6) N	11.4 ± 0.8/(10.2 - 12.8) 11.3/(10.9 - 11.9) N	p=0.445 (a)
Flexion of the knee mean ± SD/(range) median/(IQR) distribution	97° ± 6°/(90° - 110°) 100°/(90° - 100°) N	94° ± 7°/(90° - 110°) 90°/(90° - 100°) N	p=0.158 (b)
Flexion contracture of the knee mean ± SD/(range) median/(IQR) distribution	0° ± 0°/(0° - 0°) 0°/(0° - 0°) N	0° ± 0°/(0° - 0°) 0°/(0° - 0°) N	p=1.000 (b)
TLKSS: Total (0 - 100 pts) mean ± SD/(range) median/(IQR) distribution	86 ± 10/(55 - 95) 87/(83 - 93) N	79 ± 10/(60 - 99) 80/(75 - 88) N	p=0.021* (b)
TLKSS: Overall grading (n, %)
Excellent (>90 pts)	5 (33%)	3 (13%)	Excellent/good vs fair/poor 73% (primary) vs 33% (revision) p=0.022* (c)
Good (84 - 90 pts)	6 (40%)	5 (21%)
Fair (65 - 83 pts)	3 (20%)	13 (54%)
Poor (<65 pts)	1 ( 7%)	3 (13%)
KOOS [%] mean ± SD/(range) median/(IQR) distribution
Symptoms (S1-S7)	70.7 ± 8.1/(53.6 - 89.3) 71.4/(67.9 - 75.0) N	69.8 ± 5.7/(53.6 - 78.6) 71.4/(67.9 - 74.1) N	p=0.678 (a)
Pain (P1-P9)	77.0 ± 9.6/(50.0 - 86.1) 77.8/(75.0 - 83.3) N	74.8 ± 6.3/(50.0 - 80.6) 75.0/(75.0 - 77.8) N	p=0.072 (b)
Function in daily living (A1-A17)	70.7 ± 19.0/(11.8 - 85.3) 77.9/(70.6 - 79.4) N	68.3 ± 12.5/(11.8 - 79.4) 70.6/(67.7 - 70.6) N	p=0.004* (b)
Sport and Recreational activities (SP1-SP5)	37.7 ± 11.8/(10.0 - 60.0) 35.0/(35.0 - 45.0) N	37.7 ± 8.7/(10.0 - 45.0) 35.0/(35.0 - 45.0) N	p=0.988 (b)
Quality of life (Q1-Q4)	52.9 ± 13.7/(31.3 - 68.8) 50.0/(43.8 - 68.8) N	50.3 ± 10.0/(31.3 - 68.8) 46.9 (43.8 - 59.4) N	p=0.470 (b)
WOMAC [%] mean ± SD/(range) median/(IQR) distribution
Pain (i.e. KOOS P5-P9)	85.0 ± 10.0/(55.0 - 95.0) 85.0/(85.0 - 90.0) N	82.7 ± 7.1/(55.0 – 90.0) 85.0 (80.0 - 85.0) N	p=0.111 (b)
Stiffness (i.e. KOOS S6-S7)	81.7 ± 10.4/(62.5 - 100.0) 75.0/(75.0 - 87.5) N	81.3 ± 10.4/(62.5 – 100.0) 75.0/(75.0 – 87.5) N	p=0.913 (b)
Function (i.e. KOOS A1-A17)	70.7 ± 19.0/(11.8 - 85.3) 77.9/(70.6 - 79.4) N	68.3 ± 12.5/(11.8 - 79.4) 70.6/(67.7 - 70.6) N	p=0.004* (b)
Index (i.e. WOMAC total)	74.6 ± 15.5/(30.2 - 88.5) 80.2/(74.0 - 81.2) N	72.4 ± 10.5/(25.0 - 81.2) 74.0 (72.1 - 75.8) N	p=0.010* (b)
Notes: Ν indicates that the values are not normally distributed, according to the Shapiro-Wilk test, while N indicates the opposite. (a) indicates that the Student’s t-test was used, (b) indicates that the Mann-Whitney U test was used, while (c) indicated that the Fisher’s exact test was used. TLKSS, KOOS and WOMAC scores: higher the value, better are the results. (*) indicates significance at p <0.05.