Figure 3
From: Data Driven Investigation of Bispectral Index Algorithm
Observed vs model-predicted bispectral index. The scatter plot (A) and heat map chart (B) represent the agreement between the observed and the model-predicted bispectral index values in the test dataset. The darkest colors in the heat map chart indicate the points where the maximum number of data pairs in each bispectral index range is located. The majority of data points are located along the line of identity (median absolute error = 4.1 as bispectral index value) and within the designated bispectral index ranges (average positive predictive value = 89%; presented in the Fig. 2). However, in the range of bispectral index 21–41, the data pairs seem to deviate significantly from the line of identity, presumably due to the failure to include the QUAZI suppression index in the model.
