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Table 4 Intra-rater reproducibility

From: 3D black blood VISTA vessel wall cardiovascular magnetic resonance of the thoracic aorta wall in young, healthy adults: reproducibility and implications for efficacy trial sample sizes: a cross-sectional study

 

ICCa

95 % CIa

Mean difference (SD)a

95 % LOAa

Intra-rater (non-contrast enhanced)a

 - Mean aortic lumen area (cm2)a

0.99*

0.95, 1.00

0.02 (0.07)

−0.13, 0.17

 - Mean aortic total vessel area (cm2)a

0.99*

0.96, 1.00

0.04 (0.07)

−0.10, 0.18

 - Mean aortic wall area (cm2)a

0.98*

0.92, 0.99

0.01 (0.03)

−0.05, 0.07

 - Mean aortic wall thickness (mm)a

0.95*

0.82, 0.99

0.01 (0.06)

−0.10, 0.13

 - Maximum aortic wall thickness (mm)a

0.92*

0.73, 0.98

0.05 (0.11)

−0.16, 0.25

 - Mean aortic WA/TVA ratioa

0.91*

0.69, 0.98

0.00 (0.01)

−0.02, 0.02

Intra-rater (contrast-enhanced)a

 - Mean aortic lumen area (cm2)a

0.98*

0.91, 0.99

0.02 (0.09)

−0.17, 0.20

 - Mean aortic total vessel area (cm2)a

0.99*

0.94, 1.00

0.04 (0.09)

−0.13, 0.21

 - Mean aortic wall area (cm2)a

0.98*

0.77, 1.00

0.02 (0.02)

−0.03, 0.07

 - Mean aortic wall thickness (mm)a

0.93*

0.76, 0.98

0.03 (0.05)

−0.07, 0.12

 - Maximum aortic wall thickness (mm)a

0.96*

0.83, 0.99

0.00 (0.08)

−0.16, 0.16

 - Mean aortic WA/TVA ratioa

0.91*

0.71, 0.98

0.00 (0.01)

−0.02, 0.03

  1. * P < .001
  2. aICC: intraclass correlation coefficient (two-way random effects model assessing absolute agreement of single measures). CI: confidence interval. LOA: limits of agreement. WA: wall area. TVA: total vessel area