sbp {MethComp}

Systolic blood pressure measured by three different methods.

Description

For each subject (item) there are three replicate measurements by three methods (two observers, J and R and the automatic machine, S). The replicates are linked within (method,item).

Format

A data frame with 765 observations on the following 4 variables:

meth

Methods, a factor with levels J(observer 1), R(observer 2) and S(machine)

item

Person id, numeric.

repl

Replicate number, a numeric vector

y

Systolic blood pressure masurement, a numeric vector

Source

The dataset is adapted from table 1 in: JM Bland and DG Altman: Measuring agreement in method comparison studies. Statistical Methods in Medical Research, 8:136-160, 1999. Originally supplied to Bland \& Altman by E. O'Brien, see: Altman DG, Bland JM. The analysis of blood pressure data. In O'Brien E, O'Malley K eds. Blood pressure measurement. Amsterdam: Elsevier, 1991: 287-314.

See Also

sbp.MC

Examples

data(sbp)
par( mfrow=c(2,2), mar=c(4,4,1,4) )
BA.plot( sbp, comp=1:2 )
BA.plot( sbp, comp=2:3 )
BA.plot( sbp, comp=c(1,3) )
## Not run:  BA.est( sbp, linked=TRUE )