Variable Mean ± SD | Group A (n = 48) | Group B (n = 49) | P-value |
---|---|---|---|
Patient characteristics | |||
 Age (y) | 66.4 ± 5.9 | 66.5 ± 5.5 | 0.921a |
 Gender (male/female), | 4/44 | 6/43 | 0.529b |
 Body mass index (kg m−2) | 21.8 ± 3.4 | 22.4 ± 3.1 | 0.397a |
 Patient blood volume (mL) | 3487.7 ± 512.9 | 3525.3 ± 520.5 | 0.721a |
Preoperative laboratory values | |||
 Hematocrit (%) | 36.1 ± 3.2 | 36.9 ± 3.7 | 0.215a |
 Hemoglobin (g/L) | 117.5 ± 13.9 | 119.2 ± 14.8 | 0.565a |
 Platelets (×  109/L) | 232.6 ± 60.6 | 226.3 ± 60.2 | 0.605a |
 D-dimer (mg/L) | 1.1 ± 0.6 | 1.0 ± 0.5 | 0.623a |
 Activated partial thromboplastin time (s) | 26.3 ± 4.0 | 25.9 ± 3.6 | 0.685a |
 Fibrinogen (g/L) | 3.6 ± 0.9 | 3.7 ± 1.1 | 0.608a |
 Prothrombin time (s) | 11.5 ± 0.8 | 11.3 ± 0.6 | 0.191a |
 International normalized ratio | 1.0 ± 0.1 | 1.0 ± 0.1 | 0.294a |
 Erythrocyte sedimentation rate (mm/h) | 38.0 ± 18.8 | 37.1 ± 19.8 | 0.819a |
 C-reactive protein (mg/L) | 11.2 ± 7.3 | 11.4 ± 6.4 | 0.902a |
 Intraoperative blood loss (mL) | 34.8 ± 6.8 | 34.5 ± 7.1 | 0.842a |