IDEAS home Printed from https://ideas.repec.org/c/boc/bocode/s458993.html
 

POWER_SWGEE: Stata module to compute power (under both a Z and t distribution) for cluster randomized stepped wedge designs

Author

Listed:
  • John A. Gallis

    (Duke University)

  • Xueqi Wang

    (Duke University)

  • Paul J. Rathouz

    (University of Texas at Austin)

  • John S. Preisser

    (University of North Carolina at Chapel Hill)

  • Fan Li

    (Yale University)

  • Elizabeth L. Turner

    (Duke University)

Programming Language

Stata

Abstract

Stepped wedge cluster randomized trials (SW-CRTs) are increasingly being used to evaluate interventions in medical and public health contexts. With the longitudinal and crossover nature of a SW-CRT, complex analysis techniques are often needed which makes appropriately powering SW-CRTs challenging. In this paper, we introduce a newly-developed SW-CRT power calculator, embedded within the power command in Stata. The power calculator assumes a marginal model (i.e., generalized estimating equations [GEE]) for the primary analysis of SW-CRTs, for which other currently available SW-CRT power calculators may not be suitable. The program accommodates both cross-sectional and closed-cohort designs, and includes multilevel correlation structures appropriate for such designs.

Suggested Citation

  • John A. Gallis & Xueqi Wang & Paul J. Rathouz & John S. Preisser & Fan Li & Elizabeth L. Turner, 2021. "POWER_SWGEE: Stata module to compute power (under both a Z and t distribution) for cluster randomized stepped wedge designs," Statistical Software Components S458993, Boston College Department of Economics, revised 10 Jun 2022.
    • Handle: RePEc:boc:bocode:s458993
    Note: This module should be installed from within Stata by typing "ssc install power_swgee". 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

    Download full text from publisher

    File URL: http://fmwww.bc.edu/repec/bocode/p/power_cmd_swgee.ado
    File Function: program code
    Download Restriction: no
    File URL: http://fmwww.bc.edu/repec/bocode/p/power_cmd_swgee_init.ado
    File Function: program code
    Download Restriction: no
    File URL: http://fmwww.bc.edu/repec/bocode/p/power_swgee.sthlp
    File Function: help file
    Download Restriction: no
    File URL: http://fmwww.bc.edu/repec/bocode/p/power_swgee_examples.ado
    File Function: program code
    Download Restriction: no
    ---><---

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:boc:bocode:s458993. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Christopher F Baum (email available below). General contact details of provider: https://edirc.repec.org/data/debocus.html .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.