Table 2.

Comparison of mean aortic microcalcification activity to mean tissue-to-background ratio

	Range	Mean	Mean Bias (95% limits of agreement)	Intraclass Correlation Coefficient
AMA without threshold	0.75–2.73	1.62 ± 0.44	0.02 (− 0.44 to 0.44)	0.88
AMA with threshold	0.74–2.56	1.5 ± 0.43	− 0.1 (− 0.22 to 0.22)	0.93
Aneurysm AMA without variable radius	0.74–2.06	1.25 ± 0.36	0.21 (− 0.47 to 0.47)	0.94
Aneurysm AMA with variable radius	0.77–2.24	1.32 ± 0.39	0.15 (− 0.33 to 0.33)	0.97
AMA	0.77–2.56	1.53 ± 0.42	− 0.08 (− 0.19 to 0.19)	0.95

Comparison of mean aortic microcalcification activity to mean tissue-to-background ratio detailing the mean bias and intraclass correlation coefficient between the different levels of enhancement. AMA, aortic microcalcification activity; Mean ± standard deviation