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Table 3 Inter-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

Inter-rater (non-contrast enhanced)a

 - Mean aortic lumen area (cm2)a

0.99*

0.88, 1.00

0.05 (0.06)

−0.06, 0.17

 - Mean aortic total vessel area (cm2)a

0.99*

0.93, 1.00

0.05 (0.07)

−0.08, 0.19

 - Mean aortic wall area (cm2)a

0.99*

0.98, 1.00

0.00 (0.02)

−0.04, 0.04

 - Mean aortic wall thickness (mm)a

0.99*

0.95, 1.00

−0.01 (0.02)

−0.06, 0.03

 - Maximum aortic wall thickness (mm)a

0.81*

0.40, 0.96

0.14 (0.13)

−0.11, 0.40

 - Mean aortic WA/TVA ratioa

0.98*

0.76, 0.99

−0.01 (0.00)

−0.02, 0.00

Inter-rater (contrast-enhanced)

 - Mean aortic lumen area (cm2)a

0.98*

0.92, 1.00

0.04 (0.08)

−0.11, 0.20

 - Mean aortic total vessel area (cm2)a

0.98*

0.91, 1.00

0.06 (0.08)

−0.10, 0.22

 - Mean aortic wall area (cm2)a

0.91*

0.70, 0.98

0.03 (0.06)

−0.10, 0.15

 - Mean aortic wall thickness (mm)a

0.81*

0.42, 0.95

0.03 (0.11)

−0.18, 0.24

 - Maximum aortic wall thickness (mm)a

0.88*

0.56, 0.97

0.07 (0.12)

−0.17, 0.31

 - Mean aortic WA/TVA ratioa

0.81*

0.40, 0.95

0.00 (0.02)

−0.03, 0.04

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