Table 2. The intraclass correlation coefficient (ICC) and Spearman’s correlation coefficient, stratified by visual assessment values.

Groups	n	ICC (95% CI)	p-value	Spearman’s ρ	p-value
<10%	350	0.581 (0.507–0.646)	<0.001	0.698	<0.001
10%-20%	264	0.407 (0.301–0.503)	<0.001	0.546	<0.001
≥20%	383	0.965 (0.957–0.971)	<0.001	0.947	<0.001