Fig. 1

24 h survival a and amount of PRBC delivered during the first 24 h after admission b are plotted versus prothrombin concentration at admission for database 1. For clarity prothrombin concentration is divided into intervals (n_interval = (3, 6, 17, 29, 44, 61, 67, 66, 32, 33)). In the upper graph a proportion of 24 h survival is plotted versus prothrombin concentration interval, and in the lower graph b distribution of units of PRBC delivered during the first 24 h is plotted versus prothrombin concentration interval using box plots (box representing 25^th, median (dot) and 75^th percentiles, whiskers go out to 10^th and 90^th percentiles). Note: only 11 out of the 358 patients included in the graph died within 24 h