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Table 1 Inter-observer variability

From: CMR endpoints for clinical trials: impact of operator experience on the accuracy of image analysis

Observer

 

EDV* (ml)

ESV (ml)

Mass (g)

IS* (g)

1 vs 2

Mean (SD) difference

6.51 (8.92)

0.04 (0.13)

11.38 (15.08)

-0.15 (0.49)

1 vs 2

Mean (SD)

150.59 (30.29)

4.20 (0.40)

128.48 (26.95)

2.86 (1.06)

1 vs 2

Coefficient of variation (%)

5.92

3.04

11.74

17.04

1 vs 3

Mean (SD) difference

29.70 (15.83)

0.26 (0.23)

43.47 (26.81)

-0.74 (0.58)

1 vs 3

Mean (SD)

160.95 (36.28)

4.31 (0.41)

145.62 (35.55)

2.65 (1.01)

1 vs 3

Coefficient of variation (%)

9.84

5.29

18.41

21.75

  1. Summary statistics calculated are mean and SD of differences, mean and SD of values. Differences between observers are assessed using Bland-Altman plots. *log-transformed for skewed distribution.