Table 2.
Unmatched baseline characteristics
| Unmatched groups | Propensity-matched groups | |||||
|---|---|---|---|---|---|---|
| Controls, n = 405 | RBCa, n = 459 | P-valueb | Controls, n = 237 | RBC, n = 237 | P valuec | |
| SAPS 3d, median (IQRe) | 66 (58–77) | 71 (62–81) | < 0.001 | 69 (60–80) | 69 (59–79) | N.S. |
| First SOFAf | 8 (5–10) | 9 (6–11) | < 0.001 | 8 (5–11) | 8 (5–10) | N.S. |
| Days before ICUg | 0 (0–2) | 1 (0–5) | < 0.001 | 0 (0–2) | 1 (0–3) | N.S. |
| Reasons for admissionh, n (%) | ||||||
| CNSi | 91 (22) | 92 (20) | N.S. | 58 (25) | 57 (24) | N.S. |
| Hematologic | 39 (9.6) | 64 (14) | N.S. | 26 (11) | 27 (11) | N.S. |
| Gastric | 88 (22) | 148 (32) | < 0.001 | 51 (21) | 74 (31) | 0.02 |
| Metabolic | 82 (20) | 95 (21) | N.S. | 53 (22) | 51 (21) | N.S. |
| Respiratory | 188 (146) | 239 (52) | N.S | 111 (47) | 130 (55) | N.S. |
| Cardiovascular | 67 (17) | 75 (16) | N.S. | 35 (15) | 41 (17) | N.S. |
| Hepatic | 29 (7.2) | 43 (9.4) | N.S. | 22 (9.3) | 22 (9.3) | N.S. |
| Renal | 138 (34) | 160 (35) | N.S. | 89 (38) | 93 (39) | N.S. |
| Other | 42 (10) | 34 (7.4) | N.S. | 24 (10) | 26 (11) | N.S. |
| Arrival route n (%) | ||||||
| Emergency department | 115 (28) | 93 (20) | 0.007 | 64 (27) | 54 (23) | N.S. |
| General ward | 199 (49) | 232 (51) | N.S. | 128 (54) | 120 (51) | N.S. |
| Intermediate care | 7 (1.7) | 19 (4.1) | 0.046 | 3 (1.3) | 11 (4.6) | N.S. |
| Operation | 30 (7.4) | 37 (8.0) | N.S. | 21 (8.9) | 22 (9.2) | N.S. |
| Other ICU | 39 (9.6) | 48 (10) | N.S. | 20 (8.4) | 29 (12) | N.S. |
| Other arrival route | 15 (3.7) | 30 (6.5) | N.S. | 1 (0.42) | 1 (0.42) | N.S. |
aRed blood cell transfusion
bMann–Whitney or Chi-2 test
cWilcoxon rank sum or McNemar´s test
dSimplified acute physiology score 3
eInterquartile range
fSequential organ failure assessment
gDays on hospital before admission to the intensive care unit
hPatients may have more than one reason for admission
iCentral nervous system