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Table 3 Reproducibility statistics for intra-rater and inter-rater variations in measured aortic diameters and flow angles.

From: Hemodynamic predictors of aortic dilatation in bicuspid aortic valve by velocity-encoded cardiovascular magnetic resonance

  

Intra-Rater

 

Mean Value (mm)

Mean Stddev (mm)

CV (%)

CCC

Bland Altman 95% confidence interval of difference (mm)

AOV

23.74

1.17

4.6%

0.926

[-2.59,3.91]

SOV

30.32

0.98

3.2%

0.949

[-2.44,3.00]

STJ

27.42

0.67

2.6%

0.970

[-2.14,1.59]

AA

27.91

0.67

2.3%

0.988

[-1.89,1.79]

 

Mean Value (degrees)

Mean Stddev (degrees)

CV (%)

CCC

Bland Altman 95% confidence interval of difference (degrees)

FLOW ANGLE

13.7

1.64

12.0%

0.946

[-4.34,4.77]

  

Inter-Rater

 

Mean Value (mm)

Mean Stddev (mm)

CV (%)

CCC

Bland Altman 95% confidence interval of difference (mm)

AOV

23.74

1.33

5.1%

0.893

[-4.94,2.45]

SOV

30.32

1.23

3.9%

0.914

[-4.17,2.62]

STJ

27.42

1.00

3.8%

0.910

[-3.76,1.79]

AA

27.91

0.86

3.0%

0.977

[-1.97,2.78]

 

Mean Value (degrees)

Mean Stddev (degrees)

CV (%)

CCC

Bland Altman 95% confidence interval of difference (degrees)

FLOW ANGLE

13.7

1.38

10.2%

0.960

[-3.40,4.23]

  1. Data are based on 2 repeat measurements in all (25) subjects. The table gives the estimated standard deviation in repeat measurements based on pair-wise differences, the mean corresponding coefficient of variation, the concordance correlation coefficient{Lin, 1989 #188}, and Bland Altman confidence intervals{Bland, 1986 #246}.