Represents the randomization procedure Permuted Block Randomization.
pbrPar(bc, K = 2, ratio = rep(1, K), groups = LETTERS[1:K])
S4
object of the class pbrPar
.
vector which contains the lengths k_1,...,k_l
of each block.
This means that the vector bc
will have one entry for each block.
number of treatment groups (e.g. K=2 if we compare one experimental against one control treatment).
vector of length K
. The total sample number N
and
all used block lengths (bc
) have to be divisible by sum(ratio)
.
character vector of labels for the different treatments.
Fix the block constellation bc
, the number of treatment groups K
,
and the vector of the ratio
. Afterwards,
in each block the patients are assigned according to the ratio to the
corresponding treatment groups. All generated randomization sequences
are equiprobable.
W. F. Rosenberger and J. M. Lachin (2002) Randomization in Clinical Trials. Wiley.
Other randomization procedures:
abcdPar
,
bbcdPar
,
bsdPar
,
chenPar
,
crPar
,
createParam()
,
ebcPar
,
gbcdPar
,
hadaPar
,
mpPar
,
rarPar
,
rpbrPar
,
rtbdPar
,
tbdPar
,
udPar