Duration of red blood cell storage is associated with increased incidence of deep vein thrombosis and in hospital mortality in patients with traumatic injuries.

When alternative definitions of old RBCs were used, the transfusion of one or more units of RBCs 21 or more days old was associated with increased DVT and there was an association that approached significance with the transfusion of 1 or more units of RBCs 14 or more days old (Table 3 ).

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