Table 2.
Transfusion characteristics of the patients.
| Characteristic | Short-Term Storage Group (n = 194) | Long-Term Storage Group (n = 89) | p-Value |
|---|---|---|---|
| Hemoglobin at ARDS onset (g/dL) | 10.30 (9.22, 11.80) | 10.20 (9.30, 12.00) | 0.647 |
| Transfusion threshold * (g/dL) | 8.22 (7.59, 9.20) | 8.20 (7.60, 8.65) | 0.171 |
| PRBC units transfused per patient with the first 14 days (number) | 5.00 (3.00, 9.75) | 4.00 (2.00, 8.00) | 0.143 |
| PRBC units transfused per patient with the first 28 days (number) | 6.00 (2.25, 10.00) | 4.00 (2.00, 9.50) | 0.193 |
| Mean PRBC storage age per patient (days) | 20.23 (5.38) | 32.26 (3.10) | <0.001 |
| Oldest PRBC unit per patient (days) | 27.81 (8.13) | 37.49 (3.31) | <0.001 |
| Time to first PRBC transfusion (hours) | 15.90 (11.63, 19.20) | 16.08 (12.83, 19.40) | 0.657 |
| Patients receiving transfusion of other blood components, n (%) | |||
| Platelets | 137 (70.6) | 57 (64.0) | 0.333 |
| Fresh frozen plasma | 53 (27.3) | 22 (24.7) | 0.753 |
Definition of abbreviations: PRBC = packed red blood cells. Data are expressed as mean (SD), median (25%, 75% quartiles) or frequencies (%), as appropriate. * An individual hemoglobin threshold for RBC transfusion was calculated for each patient as reported previously [25].