construct_timeAdjust: Construct the time period adjustment in the design matrix

In SteppedPower: Power Calculation for Stepped Wedge Designs

Construct the time period adjustment in the design matrix

Description

Offers several options to adjust for secular trends.

Usage

construct_timeAdjust(
  Cl,
  timepoints,
  timeAdjust = "factor",
  period = NULL,
  timeBlk = NULL
)

Arguments

Cl	integer (vector), number of clusters per sequence group (in SWD), or number in control and intervention (in parallel designs)
timepoints	numeric (scalar or vector), number of timepoints (periods). If design is swd, timepoints defaults to length(Cl)+1. Defaults to 1 for parallel designs.
timeAdjust	character, specifies adjustment for time periods. One of the following: "factor", "linear", "none", "periodic". Defaults to "factor".
period	numeric (scalar)
timeBlk	an optional user defined matrix that defines the time adjustment in one cluster. Is repeated for every cluster.

Value

a matrix with one row for every cluster at every timepoint and number of columns depending of adjustment type.

SteppedPower documentation built on Sept. 13, 2023, 1:07 a.m.