The Bland & Altman method comparison compares two methods of measurement or two paired variables, and provides a plot of difference vs. mean,
in which the standard deviation of differences between measurements made by the two methods provides an index of the comparability of the methods.
The confidence interval display options include:
±1.96 standard deviation
Paired t-test CI (95%)
Paired t-test CI (99%)
Bland & Altman Plot Displaying the Difference vs. Mean for PEER Data*
* Source of data: Bland, J.M. and Altman, D.G. (1986). Statistical methods for assessing agreement between two methods of clinical measurement. Lancet, (i), 307-310.