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|Authors:||Evangelos Kontopantelis, David A Springate, Rosa Parisi, David Reeves|
|Title:||Simulation-Based Power Calculations for Mixed Effects Modeling: ipdpower in Stata|
|Abstract:||Simulations are a practical and reliable approach to power calculations, especially for multi-level mixed effects models where the analytic solutions can be very complex. In addition, power calculations are model-specific and multi-level mixed effects models are defined by a plethora of parameters. In other words, model variations in this context are numerous and so are the tailored algebraic calculations. This article describes ipdpower in Stata, a new simulations-based command that calculates power for mixed effects two-level data structures. Although the command was developed having individual patient data meta-analyses and primary care databases analyses in mind, where patients are nested within studies and general practices respectively, the methods apply to any two-level structure.|
Page views:: 2957. Submitted: 2014-05-12. Published: 2016-10-28.
Simulation-Based Power Calculations for Mixed Effects Modeling: ipdpower in Stata
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Paper: Creative Commons Attribution 3.0 Unported License
Code: GNU General Public License (at least one of version 2 or version 3) or a GPL-compatible license.