Fig. 4. Time course of the predictive ability of average and SD of blood glucose. Odds ratios (expressed with 95% confidential intervals) for glucose indexes indicate the risk change of intensive care unit mortality per 1-mmol change in each index. For example, average of blood glucose on 7 days from admission means average of entire glucose measurements during 7 days from admission. As time in intensive care unit increased, so did the ability of glucose control indices to predict outcome.