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Table 4 Left ventricular GCS intra- and inter-observer reproducibility

From: Defining the optimal temporal and spatial resolution for cardiovascular magnetic resonance imaging feature tracking

Resolution

Intra-observer

Inter-observer

Spatial (mm)

Temporal (frames/cycle)

Mean difference (SD of the Diff.)

ICC (95% CI)

CoV (%)

Mean difference (SD of the Diff.)

ICC (95% CI)

CoV (%)

5

20

0.14 (3.69)

0.96 (0.95–0.97)

13.1

1.16 (6.55)

0.85 (0.81–0.88)

23.8

5

30

0.22 (4.02)

0.95 (0.94–0.96)

13.3

1.91 (6.27)

0.86 (0.82–0.90)

21.5

5

40

0.18 (4.31)

0.95 (0.93–0.96)

14.1

1.92 (6.85)

0.84 (0.79–0.88)

23.1

5

50

0.19 (4.39)

0.94 (0.92–0.95)

14.1

1.56 (6.90)

0.81 (0.76–0.85)

22.9

8

20

0.51 (4.29)

0.94 (0.93–0.95)

15.1

1.25 (5.90)

0.87 (0.83–0.90)

21.4

8

30

0.41 (4.08)

0.94 (0.93–0.95)

14.0

1.00 (5.68)

0.87 (0.84–0.90)

20.0

8

40

0.57 (4.66)

0.94 (0.92–0.95)

15.3

1.42 (6.49)

0.85 (0.81–0.88)

22.0

8

50

0.76 (4.10)

0.94 (0.93–0.96)

13.4

1.37 (6.16 = 

0.85 (0.81–0.88)

20.8

10

20

0.36 (4.79)

0.93 (0.91–0.94)

17.1

0.74 (6.33)

0.86 (0.83–0.89)

23.1

10

30

0.23 (5.22)

0.92 (0.91–0.94)

17.6

1.71 (7.16)

0.84 (0.79–0.87)

25.0

10

40

0.61 (5.43)

0.92 (0.90–0.94)

17.8

1.19 (7,63)

0.83 (0.79–0.86)

25.7

10

50

0.58 (5.11)

0.92 (0.90–0.94)

16.7

0.83 (7.77)

0.81 (0.76–0.85)

26.0

  1. SD standard deviation, Diff difference, ICC intraclass correlation coefficient, CoV coefficient of variation, LV left ventricular, GCS global circumferential strain (n = 336 data points)