MethComp (version 1.22.2)

scint: Relative renal function by Scintigraphy

Description

Measurements of the relative kidney function (=renal function) for 111 patients. The percentage of the total renal function present in the left kidney is determined by one reference method, DMSA (static) and by one of two dynamic methods, DTPA or EC.

Usage

data(scint)

Format

A data frame with 222 observations on the following 5 variables:

meth

Measurement method, a factor with levels DMSA, DTPA, EC.

item

Patient identification.

y

Percentage of total kidney function in the left kidney.

age

Age of the patient.

sex

Sex of the patient, a factor with levels F, M.

Source

F. C. Domingues, G. Y. Fujikawa, H. Decker, G. Alonso, J. C. Pereira, P. S. Duarte: Comparison of Relative Renal Function Measured with Either 99mTc-DTPA or 99mTc-EC Dynamic Scintigraphies with that Measured with 99mTc-DMSA Static Scintigraphy. International Braz J Urol Vol. 32 (4): 405-409, 2006

Examples

  data(scint)
  str(scint)
  # Make a Bland-Altman plot for each of the possible comparisons:
  par(mfrow=c(1,2),mgp=c(3,1,0)/1.6,mar=c(3,3,1,3))
  BA.plot(scint,comp.levels=c(1,2),ymax=15,digits=1,cex=2)
  BA.plot(scint,comp.levels=c(1,3),ymax=15,digits=1,cex=2)