Official Journal of the Italian Society of Orthopaedics and Traumatology
Table 7 Correlation between transfusion requirements and variables investigated
| Â | Age | Preoperative hemoglobin concentration | Blood loss | Length of hospitalization |
|---|---|---|---|---|
Number of transfusions | ||||
 Pearson correlation | 0.256* | −0.178* | 0.346* | 0.300* |
 Significance (2-tailed) | 0.002 | 0.022 | 0.000 | 0.000 |