Table 3.
Pre- and post-transfusion comparison of lactate, central venous oxygen saturation and hemoglobin levels
| Variables | Liberal | Restrictive | p value* |
|---|---|---|---|
| (N = 39) | (N = 35) | ||
| Hemoglobin (g/dL) | |||
| PreT Hb | 8.5 (8.2 - 8.7) | 6.8 (6.6 - 6.9) | < 0.0001 |
| PosT Hb | 9.4 (9.1 - 9.5) | 7.6 (7.4 - 7.8) | < 0.0001 |
| Difference | 0.9 (0.8 - 1.1) | 0.9 (0.8 - 1.1) | |
| p value# | < 0.0001 | < 0.0001 | |
| ScvO2 (%) | |||
| PreT ScvO2 | 72.0 (69.0- 74.0) | 68.0 (64.0 - 72.0) | 0.008 |
| PosT ScvO2 | 72.0 (71.0 - 73.0) | 72.0 (69.0 - 75.0) | 0.45 |
| Difference | -1.0 (-3.0 - 3.0) | 4.0 (2.0 - 6.0) | |
| p value# | 0.96 | 0.0001 | |
| Lactate (mMol/L) | |||
| PreT lactate | 1.90 (1.80 - 2.65) | 2.44 (2.00 - 3.22) | 0.02 |
| PosT lactate | 2.00 (1.70 -- 2.41) | 2.21 (1.80 - 2.79) | 0.07 |
| Difference | - 0.09 (- 0.50 - 0.20) | - 0.19 (-0.40 - 0.10 | |
| p value# | 0.23 | 0.005 |
Hb - hemoglobin; ScvO2 - central venous oxygen saturation; PreT - pre-transfusion; PosT - post-transfusion. The results are expressed as the median values (25 - 75%).
#
p value refers to comparison within the same group (Wilcoxon rank test).
*
p value refers to differences between groups (Mann-Whitney test).