Table 3.

Descriptions of usability scores for classification and estimation of ICP, as well as approximate quantitative examples corresponding to each score

Score	Description	Examples
1	None	$|r|\le 0.25$; AUC around 0.5; bias and SD $>10$ mm Hg
2	Weak	$0.25<|r|\le 0.5$; AUC $0.55-0.7$; bias and SD $<10$ mm Hg
3	Moderate	$0.5<|r|\le 0.8$; AUC $0.7-0.9$; bias and SD $<4$ mm Hg
4	Strong	$|r|>0.8$; AUC above 0.9; bias and SD $<2$ mm Hg