Table 2.
Results at day 1 and day 3
| Outcome measure | Non-tourniquet group (n = 43) | Tourniquet group (n = 38) | Mean difference | p value |
|---|---|---|---|---|
| Flexion of the knee (°)a, c | 73.1 (69.9–76.2) | 69.9 (66.1–73.7) | 3.2 (− 1.0 to 7.4) | n.s. |
| Extension of the knee (°)a, c | 13.9 (12.4–15.4) | 14.6 (12.8–16.4) | − 0.7 (− 2.6 to 1.3) | n.s. |
| Knee circumference (cm)a, c | 46.3 (45.8–46.8) | 46.8 (46.2–47.4) | − 0.5 (− 1.1 to 0.2) | n.s. |
| VAS at 24 h (mm)a | 44.4 (35.8–53.0) | 27.9 (17.3–38.4) | 16.6 (5.2 to 27.9) | 0.005 |
| VAS at 72 h (mm)a, c | 28.5 (20.4–36.6) | 24.4 (14.4–34.2) | 4.1 (− 6.5 to 14.8) | n.s. |
| Able to perform straight leg raise, n (%)b, c | 13 (30) | 19 (50) | n.s. | |
| Hb level at day 1 (g/l)a, d | 117.6 (114.5–120.6) | 120.2 (116.4–123.9) | − 2.6 (− 6.6 to 1.5) | n.s. |
| Hb level at day 3 (g/l)a, d | 110.5 (106.9–114.1) | 110.1 (105.6–114.6) | 0.4 (− 4.4 to 5.3) | n.s. |
aANCOVA results are displayed as the mean (95% CI) adjusted for age, extension of the knee, pre-intervention value for the dependent variable, surgeon, and use of a walking aid
bResult of Chi-square test
cMeasured at day 3
dPost hoc analysis