Doppler {R4HCR} | R Documentation |
Cardiac Output Measured by Doppler Echocardiography.
Description
Cardiac output measured using Doppler echocardiography by two different observers.
Usage
Doppler
Format
A data frame with 23 observations on the following 2 variables.
A
Cardiac ouput measured by observer A (litres/minute).
B
Cardiac ouput measured by observer B (litres/minute).
Details
In a study to assess the inter-observer reproducibility of cardiac output. Twenty-three ventilated patients were measured non-invasively by Doppler echocardiography. From the four-chamber view of the heart, the readings were made by positioning the Doppler sample volume at the mitral anulus plane.
Source
Müller, R. and Büttner, P., 1994. A critical discussion of intraclass correlation coefficients. Statistics in Medicine, 13(23‐24), pp.2465-2476.
Examples
require(irr)
data(Doppler, package = "R4HCR")
# Intra-class correlation.
icc(Doppler,
model = "twoway",
type = "agreement",
unit = "single")
[Package R4HCR version 0.1 Index]