Baseline characteristics and perioperative factors after propensity-score matching based on DMT use
| . | DMT, n = 365 . | No DMT, n = 365 . | P . |
|---|---|---|---|
| Demographic variables, n (%) | |||
| Age ≥75 y | 161 (44.1) | 161 (44.1) | 1.000 |
| Female gender | 298 (81.6) | 291 (79.7) | .512 |
| Body mass index ≥30 kg/m2 | 26 (7.1) | 37 (10.1) | .147 |
| Preoperative laboratory data, n (%) | |||
| Red cell count ≥6 × 1012/L (male) or ≥5.5 × 1012/L (female) | 0 (0) | 0 (0) | — |
| Platelet count ≥400 × 109/L or <100 × 109/L | 18 (4.9) | 16 (4.4) | .725 |
| White cell count ≥10 × 109/L | 14 (3.8) | 15 (4.1) | .850 |
| Serum albumin <3.5g/dL | 89 (24.4) | 89 (24.4) | 1.000 |
| e-GFR <60 mL/min/1.73m2 | 83 (22.7) | 82 (22.5) | .929 |
| Preoperative anti-PF4/heparin antibodies: positive | 8 (2.2) | 7 (1.9) | 1.000 |
| Medical history, n (%) | |||
| Hypertension | 246 (67.4) | 254 (69.6) | .524 |
| Diabetes mellitus | 49 (13.4) | 57 (15.6) | .401 |
| Dyslipidemia | 50 (13.7) | 51 (14.0) | .915 |
| Atrial fibrillation | 7 (1.9) | 9 (2.5) | .801 |
| Malignancy | 22 (6.0) | 27 (7.4) | .460 |
| Rheumatoid arthritis | 51 (14.0) | 42 (11.5) | .318 |
| Venous thromboembolism | 6 (1.6) | 8 (2.2) | .604 |
| Operative variables, n (%) | |||
| Type of surgery: TKA | 235 (64.4) | 236 (64.7) | .938 |
| Operation time ≥120 min | 187 (51.2) | 199 (54.5) | .374 |
| Type of anesthesia | |||
| General | 113 (31.0) | 103 (28.2) | .417 |
| Combination of epidural and general | 190 (52.1) | 192 (52.6) | .882 |
| Epidural | 7 (1.9) | 9 (2.5) | .801 |
| Spinal | 55 (15.1) | 61 (16.7) | .544 |
| Postoperative thromboprophylaxis, n (%) | |||
| UFH | 19 (5.2) | 28 (7.7) | .175 |
| LMWH | 23 (6.3) | 41 (11.2) | .018 |
| Fondaparinux | 55 (15.1) | 60 (16.4) | .611 |
| Antiplatelet drug | 9 (2.5) | 5 (1.4) | .419 |
| GCSs | 353 (96.7) | 360 (98.6) | .139 |
| . | DMT, n = 365 . | No DMT, n = 365 . | P . |
|---|---|---|---|
| Demographic variables, n (%) | |||
| Age ≥75 y | 161 (44.1) | 161 (44.1) | 1.000 |
| Female gender | 298 (81.6) | 291 (79.7) | .512 |
| Body mass index ≥30 kg/m2 | 26 (7.1) | 37 (10.1) | .147 |
| Preoperative laboratory data, n (%) | |||
| Red cell count ≥6 × 1012/L (male) or ≥5.5 × 1012/L (female) | 0 (0) | 0 (0) | — |
| Platelet count ≥400 × 109/L or <100 × 109/L | 18 (4.9) | 16 (4.4) | .725 |
| White cell count ≥10 × 109/L | 14 (3.8) | 15 (4.1) | .850 |
| Serum albumin <3.5g/dL | 89 (24.4) | 89 (24.4) | 1.000 |
| e-GFR <60 mL/min/1.73m2 | 83 (22.7) | 82 (22.5) | .929 |
| Preoperative anti-PF4/heparin antibodies: positive | 8 (2.2) | 7 (1.9) | 1.000 |
| Medical history, n (%) | |||
| Hypertension | 246 (67.4) | 254 (69.6) | .524 |
| Diabetes mellitus | 49 (13.4) | 57 (15.6) | .401 |
| Dyslipidemia | 50 (13.7) | 51 (14.0) | .915 |
| Atrial fibrillation | 7 (1.9) | 9 (2.5) | .801 |
| Malignancy | 22 (6.0) | 27 (7.4) | .460 |
| Rheumatoid arthritis | 51 (14.0) | 42 (11.5) | .318 |
| Venous thromboembolism | 6 (1.6) | 8 (2.2) | .604 |
| Operative variables, n (%) | |||
| Type of surgery: TKA | 235 (64.4) | 236 (64.7) | .938 |
| Operation time ≥120 min | 187 (51.2) | 199 (54.5) | .374 |
| Type of anesthesia | |||
| General | 113 (31.0) | 103 (28.2) | .417 |
| Combination of epidural and general | 190 (52.1) | 192 (52.6) | .882 |
| Epidural | 7 (1.9) | 9 (2.5) | .801 |
| Spinal | 55 (15.1) | 61 (16.7) | .544 |
| Postoperative thromboprophylaxis, n (%) | |||
| UFH | 19 (5.2) | 28 (7.7) | .175 |
| LMWH | 23 (6.3) | 41 (11.2) | .018 |
| Fondaparinux | 55 (15.1) | 60 (16.4) | .611 |
| Antiplatelet drug | 9 (2.5) | 5 (1.4) | .419 |
| GCSs | 353 (96.7) | 360 (98.6) | .139 |
This table shows the differences in baseline characteristics and perioperative factors between 365 pairs of patients based on use of DMT (intermittent plantar compression device [foot pump] or IPCD) after propensity-score matching on a 1:1 basis.