Mean difference ± SD, absolute

0 ± 4 ml

1 ± 10 ml

1 ± 8 ml

1 ± 6%

1 ± 3 g

Mean difference ± SD, relative

1 ± 5%

1 ± 5%

1 ± 6%

1 ± 4% of EF

1 ± 5%

Coefficient of variance

4%

10%

8%

6%

3%

Coefficient of repeatability

8 ml

20 ml

16 ml

12%

6 g

R^{2}

0.96

0.87

0.85

0.47

0.97

Intraclass correlation coefficient

0.99

0.96

0.96

0.81

0.99

Interobserver variability
     
Mean difference ± SD, absolute

3 ± 4 ml

5 ± 14 ml

8 ± 7 ml

4 ± 6%

1 ± 5 g

Mean difference ± SD, relative

5 ± 6%

2 ± 6%

6 ± 6%

3 ± 4% of EF

2 ± 9%

Coefficient of variance

4%

12%

7%

7%

6%

Coefficient of repeatability

8 ml

28 ml

14 ml

12%

10 g

R^{2}

0.96

0.85

0.82

0.44

0.91

Intraclass correlation coefficient

0.98

0.95

0.91

0.81

0.98
