Bland-Altman Plot


Creates a Bland-Altman plot (also known as Tukey mean-difference plot) used to analyze the agreement of two different measurement methods.

The plot shows the relationship between the mean of two measurements and their difference. The bias of the first method is shown which states how much higher or lower the measurements on average are compared to the measurements of the second method. It also shows the limit of agreement which state how much of a difference can be expected when using one method instead of the other.

More information can be found in the original publication "Measurement in Medicine: The Analysis of Method Comparison Studies".

Input Ports

  1. Type: Data
    Data table containing the two measurements.

Output Ports

  1. Type: Image
    The Bland-Altman Plot.
  2. Type: Data
    The two selected measurements together with the calculated mean (x in the plot) and difference (y in the plot).
  3. Type: Data
    The bias (mean of the difference) and the limits of agreement (95% of the points are within the limits of agreement).


This node is part of the extension

KNIME Statistics Nodes (Labs)


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