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Table 2 Correlation analysis and limits of agreement (Bland-Altman analysis) between the echocardiographic methods based upon the experience of the readers.

From: Computer-assisted determination of left ventricular endocardial borders reduces variability in the echocardiographic assessment of ejection fraction

 

Expert (n = 5)

 

Novice (n = 2)

 

Expert (n = 1)

 
 

Limits of agreement

r

Limits of agreement

r

Limits of agreement

r

LVEF (%):

      

cAutoEF vs BS expert

1.4 ± 9.0

0.89

0.8 ± 10.5

0.85

  

AutoEF vs BS expert

    

2.2 ± 12.1

0.81

BS novice vs BS expert

  

-3.2 ± 11.4

0.81

  

cAutoEF novice vs expert

  

-0.6 ± 5.5

0.96

  

EDV/BSA (mL/cm2):

      

cAutoEF vs BS expert

-3.3 ± 13.0

0.94

-2.3 ± 13.1

0.94

  

AutoEF vs BS expert

    

-5.8 ± 14.4

0.86

BS novice vs BS expert

  

18.8 ± 22.1

0.87

  

cAutoEF novice vs expert

  

1.0 ± 5.1

0.99

  

ESV/BSA (mL/cm2):

      

cAutoEF vs BS expert

-2.6 ± 7.8

0.97

-1.8 ± 8.0

0.97

  

AutoEF vs BS expert

    

-4.3 ± 9.3

0.95

BS novice vs BS expert

  

12.1 ± 12.4

0.93

  

cAutoEF novice vs expert

  

0.8 ± 3.5

0.99

  
  1. Limit of agreement is calculated as bias ± 1.96
  2. SD BS = manual biplane Simpson, BSA = body surface area, cAutoEF = corrected AutoEF, EDV = End-diastolic volume, ESV = End-systolic volume, LVEF = Left ventricular ejection fraction