Skip to main content

Table 5 Agreement between measurements of intra- and inter-observer variability

From: Transthoracic echocardiography reference values in juvenile and adult 129/Sv mice

 

Intra-Observer

Inter-Observer

Juvenile

Mean difference ± SD

Limits of agreement

r

p*

Mean difference ± SD

Limits of agreement

r

p*

LVAWd

−0.01 ± 0.04

−0.09 to 0.08

0.91

<0.01

0.02 ± 0.06

−0.11 to 0.14

0.82

<0.01

LVAWs

−0.03 ± 0.04

−0.12 to 0.06

0.94

<0.01

0.04 ± 0.10

−0.16 to 0.24

0.72

<0.01

LVIDd

0.03 ± 0.10

−0.17 to 0.23

0.89

<0.01

0.01 ± 0.18

−0.36 to 0.38

0.64

<0.05

LVIDs

0.06 ± 0.16

−0.25 to 0.38

0.77

<0.01

0.02 ± 0.29

−0.55 to 0.60

0.20

ns

LVPWd

−0.01 ± 0.04

−0.08 to 0.07

0.97

<0.01

0.07 ± 0.14

−0.21 to 0.36

0.50

ns

LVPWs

0.00 ± 0.08

−0.16 to 0.15

0.89

<0.01

0.06 ± 0.20

−0.34 to 0.46

0.42

ns

IVSd

0.02 ± 0.04

−0.07 to 0.11

0.83

<0.01

0.05 ± 0.11

−0.17 to 0.26

0.39

ns

IVSs

0.00 ± 0.07

−0.13 to 0.14

0.91

<0.01

0.02 ± 0.13

−0.24 to 0.27

0.57

<0.05

Adult

Mean difference ± SD

Limits of agreement

r

p*

Mean difference ± SD

Limits of agreement

r

p*

LVAWd

−0.03 ± 0.07

−0.17 to 0.10

0.90

<0.01

0.03 ± 0.10

−0.18 to 0.23

0.70

<0.01

LVAWs

−0.02 ± 0.10

−0.22 to 0.17

0.84

<0.01

0.02 ± 0.10

−0.19 to 0.23

0.82

<0.01

LVIDd

0.05 ± 0.12

−0.18 to 0.28

0.87

<0.01

−0.02 ± 0.10

−0.22 to 0.18

0.91

<0.01

LVIDs

0.03 ± 0.14

−0.24 to 0.30

0.89

<0.01

0.01 ± 0.15

−0.29 to 0.30

0.91

<0.01

LVPWd

−0.03 ± 0.04

−0.12 to 0.05

0.94

<0.01

−0.05 ± 0.19

−0.42 to 0.32

0.47

ns

LVPWs

−0.01 ± 0.05

−0.12 to 0.10

0.96

<0.01

−0.10 ± 0.24

−0.57 to 0.38

0.49

ns

IVSd

−0.01 ± 0.04

−0.08 to 0.06

0.97

<0.01

−0.01 ± 0.09

−0.18 to 0.17

0.83

<0.01

IVSs

0.00 ± 0.06

−0.11 to 0.11

0.98

<0.01

0.01 ± 0.10

−0.18 to 0.21

0.93

<0.01

  1. r = Pearson’s coefficient. *p-value for correlation coefficient.
  2. LVAW = Left ventricle anterior wall. LVID = Left ventricle internal diameter. LVPW = Left ventricle posterior wall. IVS = Interventricular septum. -d = In diastole. -s = In systole.