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Table 1 Baseline characteristics

From: Transfusion of platelets, but not of red blood cells, is independently associated with nosocomial infections in the critically ill

  Overall (N = 3502) Infected (N = 476) Non-infected (N = 3026) p value
Mean age (years ± SD) 59.1 ± 16.2 59.6 ± 15.9 59.0 ± 16.3 <0.001
Gender, male [n (%)] 2129 (61) 310 (65) 1819 (60) 0.04
APACHE IV score, median (IQR) 72 (54–92) 79 (63–100) 71 (53–91) <0.001
Readmission [n (%)] 552 (16) 83 (17) 469 (15) 0.28
Admission type     0.01
 Medical [n (%)] 2040 (58) 252 (53) 1788 (59)  
 Surgical elective [n (%)] 665 (19) 91 (19) 574 (19)  
 Surgical emergency [n (%)] 795 (23) 133 (28) 662 (22)  
Any transfusion [n (%)] 1304 (37) 288 (61) 1016 (34) <0.001
Solid malignancy [n (%)] 454 (13) 54 (11) 400 (13) 0.26
Haematologic malignancy [n (%)] 137 (4) 20 (4) 117 (4) 0.73
Immunosuppressive condition (n) 392 (11) 56 (12) 336 (11) 0.67
 HIV infection [n (%)] 41 (1) 6 (1) 35 (1) 0.84
 Immunosuppressive medication [n (%)] 367 (10) 54 (11) 313 (10) 0.51
Trauma [n (%)] 280 (8) 51 (11) 229 (8) 0.02
Mechanical ventilation [n (%)] 3127 (89) 455 (96) 2672 (88) <0.001
Sepsis [n (%)] 1544 (44) 189 (40) 1355 (45) 0.04
  1. APACHE Acute Physiology and Chronic Health Evaluation, HIV human immunodeficiency virus, IQR inter-quartile range, SD standard deviation