Table 4.

Coefficient of determination (R ²) along the distance from the axis line

Distance from the axis line	Axial length vs aARC		WTW vs aARC
	R 2	P-value	R 2	P-value
7.0 mm	0.165	0.049*	0.175	0.042*
7.5 mm	0.176	0.041*	0.156	0.056
8.0 mm	0.187	0.035*	0.130	0.084
8.5 mm	0.203	0.027*	0.102	0.129
9.0 mm	0.230	0.017*	0.069	0.217

aARC average axial radius of curvature

*P < 0.05, Pearson’s correlation analysis