Patient-Specific CT-Based Instrumentation versus Conventional Instrumentation in Total Knee Arthroplasty: A Prospective Randomized Controlled Study on Clinical Outcomes and In-Hospital Data
Table 2
Clinical evaluation scales: preoperative and postoperative results.
Group I (PSI)
Group II (CI)
value
Mean ± SD
Min.–Max.
Mean ± SD
Min.–Max.
Preoperative results
KSS knee
28.5 ± 13.6
2.0–60.0
33.7 ± 16.8
0.0–70.0
0.15
KSS function
39.4 ± 18.8
0.0–80.0
42.8 ± 18.4
0.0–80.0
0.32
KSS total
67.9 ± 24.3
6.0–120.0
76.5 ± 29.8
18.0–130.0
0.14
WOMAC pain
11.6 ± 2.9
4.0–18.0
12.0 ± 3.2
6.0–20.0
0.64
WOMAC stiffness
4.7 ± 1.9
0.0–8.0
4.0 ± 1.7
0.0–6.0
0.07
WOMAC function, daily living
43.2 ± 8.1
17.0–57.0
42.3 ± 10.9
18.0–62.0
0.79
WOMAC total
59.5 ± 11.5
23.0–77.0
58.3 ± 14.5
27.0–83.0
0.79
VAS pain
68.2 ± 15.6
40.0–100.0
68.4 ± 18.0
10.0–99.0
0.59
Postoperative results
KSS knee
77.9 ± 16.9
38.0–100.0
83.5 ± 13.8
34.0–100.0
0.11
KSS function
78.8 ± 20.3
30.0–100.0
86.7 ± 14.5
50.0–100.0
0.07
KSS total
156.6 ± 33.2
78.0–200.0
170.2 ± 22.2
104.0–200.0
0.07
WOMAC pain
2.2 ± 2.9
0.0–10.0
2.0 ± 2.3
0.0–9.0
0.72
WOMAC stiffness
1.4 ± 1.7
0.0–6.0
1.6 ± 1.6
0.0–6.0
0.38
WOMAC function, daily living
13.4 ± 11.9
0.0–41.0
12.6 ± 11.5
0.0–36.0
0.79
WOMAC total
17.1 ± 15.3
0.0–55.0
16.3 ± 14.7
0.0–46.0
0.92
VAS pain
17.0 ± 16.7
0.0–73.0
19.3 ± 17.2
10.0–57.0
0.48
VAS satisfaction
91.5 ± 11.1
60.0–100.0
90.6 ± 11.4
64.0–100.0
0.74
PSI: patient-specific instrumentation, CI: conventional instrumentation, SD: standard deviation, KSS: Knee Society Score, WOMAC: The Western Ontario and McMaster Universities Arthritis Index, and VAS: Visual Analogue Scale.
