Table 4.
Univariate analysis of 1:1 propensity-score-matched demographics and clinical variables comparing patients who received tourniquet to those who received no tourniquet.
| Variables | No tourniquet |
Tourniquet |
P value |
|---|---|---|---|
| N = 3917 | N = 3917 | ||
| VTE anticoagulation | .168 | ||
| Other | 590 (15.1%) | 546 (13.9%) | |
| Aspirin | 3327 (84.9%) | 3371 (86.1%) | |
| Sex | .178 | ||
| Female | 2204 (56.3%) | 2264 (57.8%) | |
| Male | 1713 (43.7%) | 1653 (42.2%) | |
| Age | 65.6 (8.74) | 65.8 (9.42) | .257 |
| BMI | 30.8 (5.01) | 30.8 (5.28) | .991 |
| CCI | 0.38 (0.77) | 0.37 (0.74) | .800 |
| Number of joints | .196 | ||
| Unilateral | 3880 (99.1%) | 3867 (98.7%) | |
| Bilateral | 37 (0.94%) | 50 (1.28%) | |
| Type of surgery | .161 | ||
| Primary | 3777 (96.4%) | 3752 (95.8%) | |
| Revision | 140 (3.57%) | 165 (4.21%) | |
| OP time | 83.3 (34.4) | 78.4 (26.1) | .008 |
| TXA | <.001 | ||
| No | 1311 (33.7%) | 1745 (44.9%) | |
| Yes | 2577 (66.3%) | 2143 (55.1%) | |
| Blood transfusion | .573 | ||
| No | 3780 (96.5%) | 3790 (96.8%) | |
| Yes | 137 (3.50%) | 127 (3.24%) | |
| Any VTE | .141 | ||
| No | 3877 (99.0%) | 3890 (99.3%) | |
| Yes | 40 (1.02%) | 27 (0.69%) | |
| Any DVT | .018 | ||
| No | 3892 (99.4%) | 3907 (99.7%) | |
| Yes | 25 (0.64%) | 10 (0.26%) | |
| Any PE | .416 | ||
| No | 3895 (99.4%) | 3901 (99.6%) | |
| Yes | 22 (0.56%) | 16 (0.41%) |
Variables included in the match are bolded.
BMI, body mass index; CCI, Charlson Comorbidity Index; OP, operative.