glucose: Glucose measurements by different methods
In MethComp: Analysis of Agreement in Method Comparison Studies

glucose

R Documentation

Glucose measurements by different methods

Description

74 persons in 5 centres in Finland had blood glucose measured by 11 different methods, based on 4 different types of blood. Each person had blood sampled at 0, 30, 60 and 120 min after a 75 g glucose load.

Format

A data frame with 1302 observations on the following 6 variables.

meth: Method of measurement. A factor with 11 levels: n.plas1 n.plas2 h.cap h.blood h.plas h.serum m.plas m.serum o.cap s.serum k.plas.
type: Type of blood sample. A factor with 4 levels: blood plasma serum capil
item: Person id.
time: Time of blood sampling. Minutes since glucose load.
cent: Center of sampling. Except for the two first methods, n.plas1 and n.plas2, samples were analyzed at the centres too
y: Glucose measurement in mmol/l.

Source

The study was conducted at the National Public Health Institute in Helsinki by Jaana Lindstrom.

References

B Carstensen, J Lindstrom, J Sundvall, K Borch-Johnsen1, J Tuomilehto & the DPS Study Group: Measurement of Blood Glucose: Comparison between different Types of Specimens. Annals of Clinical Biochemistry, to appear.

Examples


  data( glucose )
  str( glucose )
  # Use only plasma and serum as methods and make a Bland-Altman plot
  gluc <- subset( glucose, type %in% c("plasma","serum") )
  gluc$meth <- gluc$type
  gluc$repl <- gluc$time
  BA.plot( gluc )

MethComp documentation built on Oct. 20, 2024, 9:07 a.m.