Table 1.
Patient characteristics
| Hip arthroplasty | Knee arthroplasty | p value | |
|---|---|---|---|
| n = 114 | n = 79 | (hip vs. knee) | |
| Male gender | 62 (54%) | 32 (41%) | 0.058 |
| Preop medication | |||
| NSAID | 30 (26%) | 16 (20%) | 0.33 |
| Acetylsalicylic acid | 18 (16%) | 18 (23%) | 0.22 |
| SSRI | 10 (9%) | 9 (11%) | 0.55 |
| Thromboprophylaxis | |||
| Dabigatran | 104 (91%) | 75 (95%) | 0.33 |
| LMWH | 10 (9%) | 4 (5%) | |
| Anesthesia | |||
| Spinal | 95 (83%) | 65 (82%) | 0.85 |
| General | 19 (17%) | 14 (18%) | |
| BMI (kg/ m 2 ) | 27 ± 4.1 (17–40) | 30 ± 4.5 (22–49) | <0.001 |
| Age (years) | 66 ± 12 | 69 ± 10 | 0.086 |
| Hemoglobin (g/ L) | 136 ± 13 | 133 ± 12 | 0.24 |
| Platelet count (10 9 /L) | 283 ± 65 | 280 ± 72 | 0.81 |
| PT (INR) | 1.0 ± 0.1 | 1.0 ± 0.1 | 0.77 |
| aPTT (s) | 34 ± 3.8 | 33 ± 3.3 | 0.57 |
| Operation time (min) | 125 ± 28 | 113 ± 28 | 0.004 |
| RBC transfusion | 21 (18%) | 9 (11%) | 0.18 |
| RBC transfusion (units) | 0 (0–4) | 0 (0–3) | 0.22 |
| EBL (mL) | 984 (0–4571) | 789 (0–1927) | 0.001 |
| EBL/ kg ( mL /kg) | 12 (0–33) | 9 (0–23) | <0.001 |
| Cellsaver ( mL) | 0 (0–1200) | 0 | 0.007 |
Abbreviations: aPTT activated partial thromboplastin time, BMI body mass index, EBL estimated blood loss, LMWH low molecular weight heparin, NSAID nonsteroidal anti-inflammatory drugs, PT prothrombine time, RBC transfusion red blood cell transfusion, SSRI selective seretonine receptor inhibitor.
Mean and standard deviation, median and range, or number and percentage.