Table 2
Demographic data and preoperative characteristics of the PS and CR BTKA groups before and after propensity score matching.
| Variables | Before propensity score match |
After propensity score match |
||||
|---|---|---|---|---|---|---|
| PS BTKA (n = 80) | CR BTKA (n = 46) | p value | PS BTKA (n = 43) | CR BTKA (n = 43) | p value | |
| Age | ||||||
| – Mean ± SD | 65.74 ± 6.47 | 65.87 ± 8.94 | 0.92 | 66.44 ± 6.80 | 65.84 ± 8.94 | 0.72 |
| Gender | ||||||
| Male (%) | 8 (10) | 9 (19.57) | 6 (13.95) | 6 (13.95) | ||
| Female (%) | 72 (90) | 37 (80.43) | 0.18 | 37 (86.05) | 37 (86.05) | 1.0 |
| BMI (kg/m2) | ||||||
| – Mean ± SD | 26.53 ± 3.96 | 26.83 ± 4.09 | 0.69 | 26.44 ± 3.84 | 26.68 ± 4.09 | 0.78 |
| ASA scores | ||||||
| 1 (%) | 0 | 0 | 0 | 0 | ||
| 2 (%) | 44 (55.00) | 21 (45.65) | 19 (44.19) | 20 (46.51) | ||
| 3 (%) | 36 (45.00) | 25 (54.35) | 24 (55.81) | 23 (53.49) | ||
| Preoperative VAS | 7.33 ± 1.57 | 7.18 ± 1.46 | 0.62 | 7.40 ± 1.41 | 7.01 ± 1.34 | 0.20 |
| Preoperative ROM (°) | 108.23 ± 15.90 | 109.22 ± 12.82 | 0.70 | 107.00 ± 13.25 | 107.58 ± 15.89 | 0.85 |
| Preoperative hemoglobin (g/dL) | 12.50 ± 1.40 | 12.41 ± 1.17 | 0.68 | 12.17 ± 1.33 | 12.47 ± 1.40 | 0.30 |
| Preoperative OKS | 12.60 ± 4.99 | 13.0 ± 4.31 | 0.75 | 12.85 ± 4.64 | 13.30 ± 4.70 | 0.76 |
Data are presented with mean ± SD, except Gender, and American Society of Anesthesiologists scores (ASA). n = number, BMI = body mass index, kg = kilogram, m = meter, kg/m2 = kilogram/meter2, VAS = visual analog scales for pain intensity, ROM = range of knee motion, ° = degree, g/dL = gram/deciliter, OKS = Oxford Knee Score. Statistically significant (p < 0.05).
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