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Table 3 Correlation analysis and limits of agreement (Bland-Altman analysis) between the echocardiographic methods and MPI 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 MPI

1.0 ± 14.0

0.77

0.4 ± 15.2

0.73

  

BS vs MPI

-0.3 ± 13.4

0.80

-3.6 ± 16.3

0.68

  

AutoEF vs MPI

    

1.9 ± 16.9

0.67

EDV/BSA (mL/m2):

      

cAutoEF vs MPI

-14.1 ± 25.2

0.92

-13.1 ± 27.1

0.89

  

BS vs MPI

-10.8 ± 25.6

0.89

8.0 ± 30.9

0.80

  

AutoEF vs MPI

    

-16.6 ± 28.5

0.87

ESV/BSA (mL/m2):

      

cAutoEF vs MPI

-8.7 ± 22.8

0.95

-7.9 ± 24.1

0.92

  

BS vs MPI

-6.2 ± 21.6

0.93

6.0 ± 23.4

0.87

  

AutoEF vs MPI

    

-10.4 ± 25.8

0.90

  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 MPI = myocardial perfusion imaging