Acute Perioperative Comparison of Patient-Specific Instrumentation versus Conventional Instrumentation Utilization during Bilateral Total Knee Arthroplasty
Table 1
Demographic characteristics between groups.
Category
Standard (N = 49)
PSI (N = 31)
value
Age (years), mean (SD)
61.0 (9.9)
60.8 (8.5)
0.898
<50
8 (16.33%)
3 (9.68%)
—
50–65
25 (51.02%)
20 (64.52%)
—
>65
16 (32.65%)
8 (25.81%)
—
BMI (kg/m2), mean
33.6
34.9
0.423
<30
20 (40.82%)
6 (19.35%)
—
30–35
9 (18.38%)
13 (41.94%)
—
>35
20 (40.82%)
12 (38.71%)
—
ASA, mean
2.5
2.3
0.215
1
1 (2.04%)
0 (0%)
—
2
24 (48.98%)
21 (67.74%)
—
3
24 (48.98%)
10 (32.36%)
—
Number of comorbidities
0.229
0-1
18 (36.73%)
15 (48.39%)
—
2-3
24 (48.98%)
15 (48.39%)
—
>3
7 (14.29%)
1 (3.23%)
—
Comorbidities included in this study: Hyperlipidemia, hypertension, heart disease, cancer history, chronic kidney disease, diabetes mellitus, thyroid disease, chronic obstructive pulmonary disease, hepatitis, and pancreatitis; N = sample size; SD = standard deviation.
