Official Journal of the Italian Society of Orthopaedics and Traumatology
Table 1 Baseline characteristics of and comorbidities in patients undergoing TKA with or without a tourniquet
Characteristic | No tourniquet (n = 70) | Tourniquet (n = 71) | P* |
|---|---|---|---|
Mean age, years | 66.0 ± 8.6 | 66.3 ± 8.4 | 0.805 |
Female | 57 (81.4) | 60 (84.5) | 0.627 |
BMI, kg/m2 | 26.7 ± 4.1 | 26.4 ± 3.5 | 0.629 |
Length of hospital stay, days | 5.4 ± 1.1 | 5.1 ± 0.4 | 0.109 |
Postoperative length of stay, days | 3.3 ± 1.0 | 3.1 ± 0.3 | 0.074 |
Comorbidities | |||
 Hypertension | 27 (38.6) | 20 (28.2) | 0.190 |
 Diabetes | 8 (11.2) | 4 (5.6) | 0.218 |
 Coronary heart disease | 2 (2.9) | 3 (4.2) | 0.661 |
 Hypothyroidism | 3 (4.3) | 1 (1.4) | 0.304 |
 COPD | 2 (2.9) | 2 (2.8) | 0.989 |
 Chronic liver disease | 1 (1.4) | 2 (2.8) | 0.568 |
 Renal insufficiency | 3 (4.3) | 0 | 0.078 |
 Anemia | 2 (2.9) | 1 (1.4) | 0.551 |
 Autoimmune disease | 4 (5.7) | 5 (7.0) | 0.747 |
Preoperative laboratory values | |||
 Preoperative hemoglobin, g/L | 133.2 ± 10.7 | 135.1 ± 11.5 | 0.327 |
 Preoperative hematocrit, % | 40.9 ± 3.2 | 41.5 ± 3.3 | 0.324 |
 Preoperative CRP, mg/L | 3.83 ± 2.04 | 3.23 ± 1.88 | 0.088 |
 Preoperative IL-6, pg/mL | 4.24 ± 3.97 | 3.51 ± 5.69 | 0.381 |
 Preoperative FDP, mg/L | 2.88 ± 1.23 | 2.79 ± 1.09 | 0.654 |
 Preoperative D-dimer, mg/L | 0.58 ± 0.43 | 0.49 ± 0.31 | 0.169 |
 Preoperative systolic pressure, mmHg | 136.7 ± 15.3 | 134.8 ± 15.5 | 0.459 |
 Preoperative ROM, degrees | 97.8 ± 15.0 | 98.1 ± 11.5 | 0.915 |
 Preoperative knee circumference, cm | 39.6 ± 1.5 | 40.2 ± 1.7 | 0.117 |