Table 2 Demographics of Patients Undergoing Unilateral Total Knee Arthroplasty after Propensity Matching Analysis
Spinal Anesthesia (n = 1,962) | General Anesthesia (n = 1,962) | Standardized Difference | P Value* | |
|---|---|---|---|---|
Age, (y), mean ± SD | 64.38 ± 8.70 | 64.62 ± 10.18 | -0.02 | 0.38 |
Sex, % (n) | 0.60 | |||
Male | 46.53 (913/1962) | 45.72 (897/1962) | 0.01 | |
Female | 53.47 (1049/1962) | 54.28 (1065/1962) | -0.01 | |
BMI, kg/m2, Mean ± SD | 32.31 ± 6.15 | 32.43 ± 6.23 | -0.01 | |
Functional status before surgery, % (n) | 0.83 | |||
Independent | 99.49 (1952/1962) | 99.44 (1951/1962) | 0.007 | |
Partially dependent | 0.51 (10/1962) | 0.56 (11/1962) | -0.007 | |
Totally dependent | 0.00 (0/1962) | 0.00 (0/1962) | ||
ASA PS, % (n) | ||||
ASA PS 1 or 2 | 59.07 (1159/1962) | 57.65 (1131/1962) | 0.02 | 0.36 |
ASA PS 3 or 4 | 40.93 (803/1962) | 42.35 (831/1962) | -0.02 | |
Smoker, % (n) | ||||
No | 91.13 (1788/1962) | 91.74 (1800/1962) | -0.02 | 0.47 |
Yes | 8.87 (174/1962) | 8.26 (162/1962) | 0.02 | |
Pre-op Hematocrit, Mean ± SD | 41.76 ± 3.68 | 41.60 ± 4 | 0.04 | 0.17 |
Surgical Duration, min, Mean ± SD | 85.50 ± 26.64 | 86.28 ± 30.96 | -0.02 | 0.24 |
Hypertension, % (n) | 58.92 (1156/1962) | 59.53 (1168/1962) | -0.01 | 0.69 |
Diabetes, % (n) | 15.80 (310/1962) | 15.75 (309/1962) | 0.001 | 0.96 |
Congestive Heart Failure, % (n) | 0.05 (1/1962) | 0.05 (1/1962) | 0.00 | 1.00 |
Bleeding disorder, % (n) | 1.53 (30/1962) | 1.63 (32/1962) | -0.008 | 0.79 |
COPD, % (n) | 2.34 (46/1962) | 2.60 (51/1962) | -0.01 | 0.61 |