Fig. 2

Bland–Altman plots of variability according to pathologists A and B. The x-axis depicts the mean endometrial sample dating for pathologist A and pathologist B; the y-axis is the difference from the mean endometrial dating between pathologists A and B. The upper and lower lines on the B–A plots represent the limits of agreement and the mean difference ± 1.96 times its standard deviation. Thus, the distance from 0 and the width of the limits of agreement both indicate the magnitude of disagreement between pathologists. Closer clustering to the mean indicates higher agreement. If the difference value for an endometrial dating is = 0, then the endometrial dating by pathologist A and pathologist B was identical