Debunking the survival bias myth

In Brief BACKGROUND Controversy surrounds the optimal ratios of blood (packed red blood cell [PRBC]), plasma (fresh frozen plasma [FFP]) and platelet (PLT) use for patients requiring massive transfusion (MT) owing to possible survival bias in previous studies. We sought to characterize mortality during the first 24 hours while controlling for time varying effects of transfusion to minimize survival bias. METHODS Data were obtained from a...