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.