Table 8.

Sensitivity and specificity of “interpretable” MRA according to quality of vascular opacification

Quartile of vascular opacification score (min, max)	Reference PE and MR PE	Reference PE and MR No PE	Reference no PE and MR no PE	Reference no PE and MR PE	Sensitivity	Specificity
	n	n	n	n	P (95% CI)	P (95% CI)
Sensitivity and specificity by quartile of opacification score
1 (0,0)	21	3	33	1	0.88 (0.68–0.97)	0.97 (0.85–1.00)
2 (1,1)	14	1	33	1	0.93 (0.68–1.00)	0.97 (0.85–1.00)
3 (2,3)	22	2	28	1	0.92 (0.73–0.99)	0.97 (0.82–1.00)
4 (4,6)	8	0	7	1	1.00 (0.63–1.00)	0.88 (0.47–1.00)
Sensitivity and specificity by quartile of opacification score with MRAs with major motion artifacts and major wrap artifacts removed
1 (0,0)	20	3	32	1	0.87 (0.66–0.97)	0.97 (0.84–1.00)
2 (1,1)	13	1	32	1	0.93 (0.66–1.00)	0.97 (0.84–1.00)
3 (2,3)	20	1	21	1	0.95 (0.76–1.00)	0.95 (0.77–1.00)
4 (4,6)	5	0	5	0	1.00 (0.48–1.00)	0.83 (0.36–1.00)