Skip to main content

Table 4 Intra-observer and inter-observer reproducibility for strain (ε) and strain rate (SR) parameters

From: Quantification of left atrial strain and strain rate using Cardiovascular Magnetic Resonance myocardial feature tracking: a feasibility study

 

Intra-observer

Inter-observer

 

Mean difference ± SD*

CV [%]

ICC (95% CI)

Mean difference ± SD [%]

CV [%]

ICC (95% CI)

ε s

1.09 ± 1.99

8.79

0.98 (0.93-1.00)

1.14 ± 1.92

8.47

0.98 (0.92-1.00)

ε e

0.69 ± 1.71

12.59

0.97 (0.90-0.99)

0.94 ± 2.10

15.34

0.96 (0.84-0.99)

ε a

0.40 ± 0.87

9.66

0.99 (0.96-1.00)

0.19 ± 0.71

8.00

0.99 (0.98-1.00)

SRs

0.05 ± 0.07

8.46

0.97 (0.88-0.99)

0.05 ± 0.09

10.49

0.96 (0.82-0.99)

SRe

-0.02 ± 0.07

10.41

0.97 (0.90-0.99)

-0.05 ± 0.09

13.68

0.95 (0.78-0.99)

SRa

-0.06 ± 0.08

9.48

0.99 (0.93-1.00)

-0.03 ± 0.09

10.64

0.99 (0.96-1.00)

  1. SD, standard deviation; CV, coefficient of variation; ICC, intraclass correlation coefficient; ε, strain; SR, strain rate;
  2. *Mean difference ± SD are given as [%] for ε and as [s-1] for SR parameters.