| glucose {MethComp} | R Documentation |
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.
data(glucose)
A data frame with 1302 observations on the following 6 variables.
methn.plas1 n.plas2 h.cap h.blood
h.plas h.serum m.plas m.serum
o.cap s.serum k.plas.typeblood plasma serum capilitemtimecentn.plas1 and n.plas2, samples were analyzed
at the centres tooyThe study was conducted at the National Public Health Institute in Helsinki by Jaana Lindström.
B Carstensen, J Lindström, 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.
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 )