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Reliability of echocardiographic measurements of left cardiac structures in healthy children

Published online by Cambridge University Press:  20 August 2009

Miranda J. J. Geelhoed
Affiliation:
The Generation R Study Group, Erasmus Medical Center, Rotterdam, The Netherlands Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands Department of Pediatrics, Erasmus Medical Center, Rotterdam, The Netherlands
Sonja P. E. Snijders
Affiliation:
The Generation R Study Group, Erasmus Medical Center, Rotterdam, The Netherlands
Veronica E. Kleyburg-Linkers
Affiliation:
The Generation R Study Group, Erasmus Medical Center, Rotterdam, The Netherlands
Eric A. P. Steegers
Affiliation:
Department of Obstetrics & Gynecology, Erasmus Medical Center, Rotterdam, The Netherlands
Lennie van Osch-Gevers
Affiliation:
Department of Pediatrics, Erasmus Medical Center, Rotterdam, The Netherlands
Vincent W. V. Jaddoe
Affiliation:
The Generation R Study Group, Erasmus Medical Center, Rotterdam, The Netherlands Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands Department of Pediatrics, Erasmus Medical Center, Rotterdam, The Netherlands
Corresponding
E-mail address:

Abstract

Background

Echocardiographic measurements are widely used as outcomes of different studies. The aim of this study was to assess intraobserver and interobserver reliability of echocardiographic measurements in healthy children.

Materials and methods

We studied 28 children, with a median age of 7.5 years, and inter-quartile range from 3 to 11 years. Intraobserver and interobserver reliability were assessed by repeated measurements of the diameters of the aortic root, the left atrium, and left ventricular end-diastolic structure. We also measured the ventricular end-diastolic septal thickness and the end-diastolic thickness of the left ventricular posterior wall. We calculated intraclass correlation coefficients, with corresponding 95% confidence intervals, and computed Bland and Altman plots, permitting us to derive limits of agreement plus or minus 2 standard deviations for the mean differences in cardiac measurements.

Results

We found high intraobserver and interobserver intraclass correlation coefficient, ranging from 0.91 for ventricular septal thickness, with 95% confidence intervals from 0.78 to 0.96, to 0.99 for the diameter of the aortic root, 95% confidence interval from 0.97 to 1.00. Limits of agreement in the Bland and Altman plots ranged from zero millimetres for left ventricular end-diastolic posterior wall thickness to 1.60 millimeters (6.3%) for left atrial diameter.

Conclusions

Our study demonstrated good repeatability and reproducibility for ultrasonic measurements of left cardiac structures in children, showing that values obtained for measurement of these structures in both clinical and epidemiological research projects can be confidently accepted.

Type
Original Article
Copyright
Copyright © Cambridge University Press 2009

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References

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Reliability of echocardiographic measurements of left cardiac structures in healthy children
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