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Table 4 Intra-observer variability

From: 2D cine vs. 3D self-navigated free-breathing high-resolution whole heart cardiovascular magnetic resonance for aortic root measurements in congenital heart disease

 

Observer 1

Observer 2

CuCo max

CuCu max

CuCo max

CuCu max

2D cine

 Mean difference (mm)

− 0.4

− 0.3

− 0.1

− 0.3

 95% Limits of agreement (mm)

− 3.0 to 2.1

− 2.7 to 2.1

− 3.9 to 3.6

− 3.5 to 2.9

 Standard deviation (mm)

1.3

1.2

1.9

1.6

 Variance (mm2)

1.7

1.5

3.6

2.6

 ICC

0.989

0.991

0.975

0.985

3D self nav

 Mean difference (mm)

− 0.6

− 0.6

− 0.1

− 0.4

 95% Limits of agreement (mm)

− 5.3 to 4.0

− 3.4 to 2.2

− 1.9 to 2.0

− 2.3 to 1.5

 Standard deviation (mm)

2.4

1.4

1.0

1.0

 Variance (mm2)

5.6

2.0

1.0

1.0

 ICC

0.965

0.971

0.994

0.994

 P value

0.884

0.268

0.712

0.993

 p-value (F test)

0.047

0.336

0.020

0.034

  1. ICC interclass correlation coefficient, others see Table 3