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Table 4 Inter- and intra-observer variabilities

From: Evaluation of a commercial multi-dimensional echocardiography technique for ventricular volumetry in small animals

   

Inter-observer variability

Intra-observer variability

   

Mean diff. ± SD

LOA

Mean diff. ± SD

LOA

1DE

ESV

SHAM

TAC

3.8 ± 6.0

2.8 ± 11.2

−9.4 to 17.0

−20.9 to 26.6

2.3 ± 6.0

− 0.8 ± 11.0

− 10.8 to 15.5

− 24.0 to 22.5

EDV

SHAM

TAC

6.2 ± 6.2

7.2 ± 8.6

− 7.3 to 19.7

− 11.0 to 25.5

2.1 ± 5.8

− 0.3 ± 7.9

− 10.6 to 14.8

− 17.0 to 16.5

EF

SHAM

TAC

−1.4 ± 4.5

2.2 ± 6.5

− 11.2 to 8.4

− 11.5 to 15.9

−2.1 ± 4.3

1.3 ± 5.8

− 11.4 to 7.2

− 11.0 to 13.5

SV

SHAM

TAC

−1.1 ± 5.9

4.4 ± 3.9

−1.1 to 5.9

− 3.8 to 12.6

−0.03 ± 1.5

1.8 ± 4.4

− 3.2 to 3.2

− 7.5 to 11.2

2DE

ESV

SHAM

TAC

−1.9 ± 5.7

− 5.4 ± 11.7

− 14.3 to 10.4

− 30.1 to 19.4

0.3 ± 6.2

− 0.5 ± 12.4

− 13.2 to 13.9

− 26.9 to 25.8

EDV

SHAM

TAC

−4.6 ± 6.2

− 7.0 ± 9.2

−18.1 to 9.0

− 26.4 to 12.4

−2.2 ± 7.3

− 0.9 ± 10.0

− 18.2 to 13.7

− 22.0 to 20.3

EF

SHAM

TAC

−1.1 ± 4.6

−0.6 ± 5.9

− 11.1 to 9.0

− 11.9 to 13.1

−2.1 ± 4.3

1.3 ± 5.8

−11.4 to 7.2

− 11.0 to 13.5

SV

SHAM

TAC

−3.9 ± 2.6

− 1.8 ± 3.8

− 9.5 to 1.7

− 9.9 to 6.3

−2.6 ± 2.3

− 0.3 ± 3.7

−7.6 to 2.5

− 8.1 to 7.5

3DE

ESV

SHAM

TAC

−1.72 ± 3.5

6.18 ± 4.3

−9.4 to 5.9

− 3.0 to 15.4

−2.6 ± 2.9

4.0 ± 3.9

− 9.0 to 3.7

− 4.3 to 12.2

EDV

SHAM

TAC

1.06 ± 3.6

4.87 ± 4.5

− 6.8 to 8.9

− 4.7 to 14.4

− 0.3 ± 3.4

1.0 ± 4.4

−7.7 to 7.2

− 8.2 to 10.3

EF

SHAM

TAC

5.44 ± 5.3

− 4.23 ± 5.4

−6.2 to 17.1

− 15.7 to 7.2

5.7 ± 4.3

− 5.6 ± 5.4

− 3.7 to 15.1

− 17.1 to 5.9

SV

SHAM

TAC

2.78 ± 2.6

−1.31 ± 3.7

−2.8 to 8.4

− 9.2 to 6.5

2.4 ± 2.2

− 2.9 ± 3.7

− 2.4 to 7.1

− 10.8 to 5.0

  1. SHAM: n = 7, TAC: n = 9. SD = standard deviation; LOA = limits of agreement; ESV = end-systolic volume (μl); EDV = end-diastolic volume (μl); EF = ejection fraction (%); SV = stroke volume (μl)