construct_trtMat

Constructs a matrix of `#cluster` rows and `#timepoint` columns, indicating
treatment status in each cluster at each timepoint.

Tools for power and sample size
calculation as well as design diagnostics for
longitudinal mixed model settings, with a focus on stepped wedge designs.
All calculations are oracle estimates i.e. assume random effect variances
to be known (or guessed) in advance.
The method is introduced in Hussey and Hughes (2007) <doi:10.1016/j.cct.2006.05.007>,
extensions are discussed in Li et al. (2020) <doi:10.1177/0962280220932962>.

Philipp Mildenberger

SteppedPower

Power Calculation for Stepped Wedge Designs

Federico Marini

construct_trtMat function

<dl><dt>Cl</dt>
<dd>integer (vector), number of clusters per sequence group (in SWD),
or number in control and intervention (in parallel designs)</dd>
<dt>trtDelay</dt>
<dd>numeric (possibly vector), `NA`(s) and/or value(s)
between `0` and `1`. `NA` means that first (second, ... ) period after intervention
start is not observed. A value between `0` and `1` specifies the assumed proportion of intervention effect
in the first (second ... ) intervention period.</dd>
<dt>dsntype</dt>
<dd>character, defines the type of design. Options are "SWD",
"parallel" and "parallel_baseline", defaults to "SWD".</dd>
<dt>timepoints</dt>
<dd>numeric (scalar or vector), number of timepoints (periods).
If design is swd, timepoints defaults to length(Cl)+1.
Defaults to 1 for parallel designs.</dd></dl>

Arguments

Construct Treatment Matrix — construct_trtMat

<dl>

<dt>Cl</dt>
<dd>integer (vector), number of clusters per sequence group (in SWD),
or number in control and intervention (in parallel designs)</dd>


<dt>trtDelay</dt>
<dd>numeric (possibly vector), `NA`(s) and/or value(s)
between `0` and `1`. `NA` means that first (second, ... ) period after intervention
start is not observed. A value between `0` and `1` specifies the assumed proportion of intervention effect
in the first (second ... ) intervention period.</dd>


<dt>dsntype</dt>
<dd>character, defines the type of design. Options are "SWD",
"parallel" and "parallel_baseline", defaults to "SWD".</dd>


<dt>timepoints</dt>
<dd>numeric (scalar or vector), number of timepoints (periods).
If design is swd, timepoints defaults to length(Cl)+1.
Defaults to 1 for parallel designs.</dd>

</dl>

construct_trtMat: Construct Treatment Matrix

Description

Usage

Value

Arguments

Examples