Table 2.

Example of indices calculated from the first persistence diagram PD₁.

	Grade	Mean	95% CI
${\mathrm{Center}}_x$	G1	222.8	220.2–225.4
	G2	221.3	214.7–227.8
	G3	207.4	197.5–217.4
${\mathrm{Center}}_y$	G1	229.2	226.9–231.5
	G2	227.6	221.7–233.5
	G3	216.0	207.3–224.7
WSS	G1	28.32	25.93–30.71
	G2	27.59	22.45–32.73
	G3	41.36	33.70- 49.02