Comparison between control and intervention period in terms of total joint replacement operations requiring blood transfusions, with crude and adjusted odds ratios for transfusions
| Type of transfusion | Control period | Intervention period | Odds ratio* (95% CI) | |
|---|---|---|---|---|
| Crude | Adjusted† | |||
| *Odds ratio <1 indicates that transfusions were administered less often during the intervention period compared with the control period. | ||||
| †Adjusted for age, sex, presence of risk factors, preoperative haemoglobin concentrations, type of surgery, bilateral operation, type of anaesthesia, duration of operation, estimated intraoperative blood loss, and postoperative haemoglobin concentrations. | ||||
| Allogeneic transfusions | 79/226 | 44/222 | 0.46 (0.30 to 0.70) | .0.20 (0.10 to 0.39) |
| Autologous transfusions | 65/226 | 13/222 | 0.15 (0.08 to 0.29) | 0.14 (0.06 to 0.33) |
| Any transfusions | 135/226 | 55/222 | 0.22 (0.15 to 0.33) | 0.07 (0.03 to 0.14) |