Fig. 3From: Using information theory to identify redundancy in common laboratory tests in the intensive care unitInformation contained in daily ICU lab test results. The total and novel amounts of information are plotted as a function of ICU day. The horizontal dashed lines at 4.32 bits represent the maximum achievable entropy. The redundant portions (i.e., total minus novel) of day 2 and 3 are the mutual information between days 1 and 2 and between days 2 and 3, respectively. Although all lab tests contain redundant information on days 2 and 3 compared to the previous day, platelet, BUN, and Cr have the least novel information on days 2 and 3. Hct hematocrit, WBC white blood cell count, K potassium, Na sodium, Cl chloride, BUN blood urea nitrogen, Cr creatinine, Lac lactateBack to article page