Research Article
Low Body Mass Index and Blood Loss in Primary Total Hip Arthroplasty: Results from 236 Consecutive Ankylosing Spondylitis Patients
Table 3
Intraoperative data, blood loss, and transfusion.
| | Underweight group | Normal weight group | |
| Operating time (min)* | 60 (11) | 61 (8) | 0.984 | Diameter of acetabular cup (mm)* | 52.0 (2.2) | 52.4 (2.0) | 0.092 | Intrablood loss/BV (%)* | 10 (1) | 10 (2) | 0.277 | Hidden blood loss/BV (%)* | 15 (1) | 13 (3) | <0.001 | CTBL/BV (%)* | 25 (2) | 23 (4) | <0.001 | Transfusion rate | 75/91 | 98/145 | 0.012† | RBCs transfused (U)* | 1.9 (0.2) | 2.0 (0.1) | 0.235 | Length of external wound compression time (h) | 35 (7) | 43 (6) | <0.001 |
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Mean (SD). †Chi-square test. CTBL: calculated total blood loss; BV: blood volume; RBC: red blood cell.
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