FEV {R4HCR} | R Documentation |
Forced Expiratory Volume Data.
Description
Pairs of measurements of Forced Expiratory Volume (FEV), taken a few weeks apart from 20 Scottish schoolchildren.
Usage
FEV
Format
A data frame with 20 observations on the following 3 variables.
child
Child identification number
fev1
First FEV measurement
fev2
Second FEV measurement
Details
The data in table 1 of the original Bland and Altman paper does not correspond to the ANOVA analysis of Table 2. The corrected data does recreate the ANOVA analysis and so is given here.
Source
Corrected data can be found here https://www.bmj.com/content/suppl/1999/03/16/313.7048.41.DC1
References
Bland, JM. & Alman, DG. 1996. Measurement Error and Correlation Coefficients. Br Med J., 313, pp.41-42.
Examples
data(FEV, package="R4HCR")
# reshape to long
FEVl <- reshape(FEV,
direction = "long",
idvar = "child",
varying =list(2:3),
v.names = "fev")
# one-way ANOVA - as per table 2 of Bland and Altman.
anova(lm(fev ~ factor(child), data = FEVl))
[Package R4HCR version 0.1 Index]