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Table 2 Unadjusted mortality rates according to quartiles of maximum age of red cells

From: Age of red blood cells and mortality in the critically ill

Quartile Age of RBCs (days) Mortality
   All patients APACHE III scored
1 7.7 (2 to 11) 25/189 (13.2%) 24/185 (13.0%)
2 13.8 (11 to 18) 41/189 (21.7%) 40/175 (22.9%)
3 22.6 (18 to 28) 36/189 (19.1%) 34/176 (19.3%)
4 34.4 (28 to 42) 44/190 (23.2%) 43/177 (24.3%)
2 to 4 22.7 (11 to 42) 121/568 (21.3%) 117/528 (22.1%)
  1. Values expressed as median (range) or number/total (proportion). RBC, red blood cell; APACHE, Acute Physiology and Chronic Health Evaluation.