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RALLOC: Stata module to design randomized controlled trials

Author

Listed:
  • Philip Ryan

    (University of Adelaide)

Programming Language

Stata

Abstract

ralloc provides a sequence of treatments randomly permuted in blocks of constant or varying size. If not constant, the size and order of the blocks are also random. Allocation may be stratified by one or more variables. In non-factorial designs, up to 10 treatments may be specified. Randomisation may also proceed simultaneously on 2 factors: 2x2, 2x3, 3x2, 3x3, 2x4, 4x2, 3x4, 4x3 and 4x4 factorial designs are supported, or on 3 factors for 2x2x2, 2x2x3, 2x3x3 and 3x3x3 designs. ralloc will also handle a 2x2 crossover design with or without a supplementary 3rd period as either a "switchback" or "extra period" design (Jones and Kenward 1989). A typical use of ralloc is in a randomised controlled clinical trial (RCT), and, in particular, in a multicentred trial where balance in treatment allocations may be desirable within centre and other defined strata. This is version 3.7.6 of the software, updated from the version published in STB-54. A test data file is included in raltest6.dta.

Suggested Citation

  • Philip Ryan, 1997. "RALLOC: Stata module to design randomized controlled trials," Statistical Software Components S319901, Boston College Department of Economics, revised 28 Jan 2018.
    • Handle: RePEc:boc:bocode:s319901
    Note: This module may be installed from within Stata by typing "ssc install ralloc". The module is made available under terms of the GPL v3 (https://www.gnu.org/licenses/gpl-3.0.txt). Windows users should not attempt to download these files with a web browser.
    as

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    File URL: http://fmwww.bc.edu/repec/bocode/r/ralloc.ado
    File Function: program code
    Download Restriction: no
    File URL: http://fmwww.bc.edu/repec/bocode/r/ralloc.sthlp
    File Function: help file
    Download Restriction: no
    File URL: http://fmwww.bc.edu/repec/bocode/r/ralloc_678.ado
    File Function: program code
    Download Restriction: no
    File URL: http://fmwww.bc.edu/repec/bocode/r/ralloc_678.hlp
    File Function: help file
    Download Restriction: no
    File URL: http://fmwww.bc.edu/repec/bocode/r/raltest6.dta
    File Function: test data file
    Download Restriction: no
    File URL: http://fmwww.bc.edu/repec/bocode/r/raltest6_lab.dta
    File Function: test data file
    Download Restriction: no
    File URL: http://fmwww.bc.edu/repec/bocode/r/raltest12_lab.dta
    File Function: test data file
    Download Restriction: no
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