Early Transfusion Triggers in Trauma Patients. Scatter plots displaying the correlation between potential early factors contributing to the decision to transfuse blood products in patients admitted to the trauma centre, rigshospitalet, copenhagen university hospital, denmark, in the period 2001-3 and 2005-7. For each period the plots show correlations between: a) hemoglobin (mm) and time to first blood product delivery (h), b) age (years) and time to first blood product delivery (h) and c) iss and time to first blood product delivery (h). The y-axis is truncated at 12 hours leaving out 4 observations that though not displayed contribute to the statistics. Rho and p-values are shown for each period together with p-values for the ancova (period*variable interaction).