Table 1 Comparison of baseline determinants between patients with bilateral simultaneous total knee arthroplasty (BSTKA) and staged TKA before propensity score matching.
Parameters | BSTKA (n = 434 patients) | Staged TKA (n = 97 patients) | p value |
|---|---|---|---|
Age*(years) | 76 (45–90) | 76 (44–91) | 0.694 |
Sex† | 0.672 | ||
Male | 77 (18) | 19 (20) | |
Female | 357 (82) | 75 (80) | |
Body mass index*(kg/m2) | 26 (13–49) | 25 (14–38) | 0.043 |
Diagnosis† | 0.010 | ||
Osteoarthritis | 416 (96) | 86 (89) | |
Rheumatoid arthritis | 18 (4.1) | 11 (11) | |
American Society of Anesthesiologists score† | 0.166 | ||
1 | 67 (15) | 12 (12) | |
2 | 341 (79) | 83 (86) | |
3 | 26 (6) | 2 (2) | |
Age-adjusted Charlson Comorbidity Index† | < 0.001 | ||
1–2 | 52 (12) | 2 (2) | |
3–4 | 267 (62) | 42 (43) | |
≤ 5 | 115 (26) | 53 (55) |
