Demographic characteristics of the subject group
| Characteristics | Group; mean (and standard deviation)* | p | |
|---|---|---|---|
| Transfused (n = 517) | Not transfused (n = 1358) | ||
| Age, yr | 71 (12) | 66 (11) | < 0.0001 |
| Male, total % | 36 | 46 | < 0.0001 |
| Weight, kg | 77 (18) | 89 (19) | < 0.0001 |
| Height, cm | 164 (11) | 168 (11) | < 0.0001 |
| ASA ≥ III, total % | 45 | 37 | 0.0003 |
| Admission hemoglobin, g/dl | 131 (14) | 140 (13) | < 0.0001 |
| Hip, total % | 51 | 48 | NS |
| Knee, total % | 49 | 52 | NS |
| Revision procedure, total % | 20 | 9 | < 0.0001 |
| Regional anesthesia used, total % | 68 | 73 | 0.049 |
| Operative time, min | 98 (58) | 75 (28) | < 0.0001 |
| Autologous blood recipients, total % | 0.6 | 3.3 | NS |
NS = not significant.
↵* Unless otherwise indicated.