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Table 4 Published studies and Present study: Intraobserver Comparison of Echocardiographic Measurements

From: "Echocardiography in Nigeria: use, problems, reproducibility and potentials"

  Dai et al (ref 27) Present Study Ladipo et al (ref 29) Schieken et al (ref 26)
Parameter Mdiff SD Error Mdiff SD Error Mdiff SD Error Mdiff SD Error
RVOT NA NA NA -0.06 0.39 0.195 NA NA NA NA NA NA
AO 0.05 1.20 0.60 0.025 0.152 0.076 NA NA NA NA NA 0.05
AVO NA NA NA -0.08 0.37 0.185 NA NA NA NA NA NA
LA 0.15 1.35 0.675 0.12 0.29 0.145 NA NA NA NA NA 0.06
IVSd 0.05 0.82 0.41 0.09 0.10 0.05 0.04–0.08 0.06–0.18 0.03–0.09 NA NA 0.06
IVSs 0.05 1.13 0.565 0.04 0.22 0.11 NA NA NA NA NA NA
LVIDd -0.60 0.97 0.485 0.02 0.41 0.205 0.07–0.12 0.10–0.28 0.05–0.14 NA NA 0.13
LVIDs -0.15 1.18 0.595 0.03 0.37 0.185 0.02–0.08 0.09–0.20 0.05–0.10 NA NA 0.10
PWTd 0.13 0.84 0.42 0.03 0.16 0.080 0.06–0.10 0.09–0.27 0.05–0.14 NA NA 0.06
PWTs 0.33 1.14 0.57 0.10 0.18 0.090 NA NA NA NA NA NA
LVM -1.82 18.79 9.40 5.68 36.3 18.1 NA NA NA NA NA NA
  1. RVOT = Right Ventricular Outflow Diameter, AO = Aortic Root Diameter, AVO = Aortic Valve Opening, LA = Left Atrial Diameter, IVSd = Interventricular Septal wall thickness in diastole, IVSs = Interventricular septal wall thickness in systole, LVIDs = Left ventricular Internal Diameter in Diastole, LVIS = Left Ventricular internal diameter in Systole, PWTd = Posterior Wall Thickness in Diastole, PWTs = Posterior Wall Thickness in Systole, LVM = Left Ventricular Mass, Mdiff = Mean difference, SD = Standard Deviation, Error = SD/2 NA = Not Available.