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Sample size calculations

2013
In this chapter several sample size calculation formulas are introduced. They include the standard sample size calculation formula for both continuous and dichotomous outcomes as well as the adjustments for either clustering (i.e., for a cluster RCT) or designs with more than one follow-up measurement. Besides the formulas and an example how to use the
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An unorthodox approach to calculating sample size

BMJ, 2012
Norman and colleagues raise an important issue—sample size calculations are at best an educated guess.1 While their suggestion might be helpful when an idea of sample size can be gleaned, in a recent study we had very little information at all. The study was a primary care inception cohort of a rare and little researched condition. Initially, we …
Sara, Muller, Samantha L, Hider, Toby, Helliwell, Christian D, Mallen   +3 more
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Sample‐size calculation for tests of homogeneity

Canadian Journal of Statistics, 2016
AbstractMixture models are widely used to explain excessive variation in observations that is not captured by standard parametric models, and they lead to suggestive latent structures. The hypothetical latent structure often needs critical examination based on experimental data.
Chen, Jiahua, Li, Pengfei, Liu, Yukun
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Sample size calculation in medical studies.

Gastroenterology and hepatology from bed to bench, 2013
Optimum sample size is an essential component of any research. The main purpose of the sample size calculation is to determine the number of samples needed to detect significant changes in clinical parameters, treatment effects or associations after data gathering.
Pourhoseingholi, Mohamad Amin, Vahedi, Mohsen, Rahimzadeh, Mitra   +2 more
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Sample size calculations with compliance information

Statistics in Medicine, 2000
In randomized clinical trials, non-compliance will lead to the loss of power in the standard intention-to-treat analysis and one should account for this in sample size calculations. In this paper a new sample size formula for a binary outcome is proposed in which compliance information is considered. The proposed method is based purely on the treatment
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Sample Size Calculations for Pathogen Variant Surveillance in the Presence of Biological and Systematic Biases

Cell Reports Medicine, 2023
Shirlee Wohl, Elizabeth C Lee, Justin Lessler   +2 more
exaly  

Sample Size Calculations

2021
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The Fragility Index Can Be Used for Sample Size Calculations in Clinical Trials

Journal of Clinical Epidemiology, 2021
Mary Charlson, Mario Gaudino, Martin Wells   +2 more
exaly  

Resource Equation Method for Sample Size Calculation in Animal Studies

American Journal of Emergency Medicine, 2023
Ju-Tae Sohn
exaly  

Sample Size Calculations in Randomised Trials: Mandatory and Mystical

Lancet, The, 2005
David A Grimes
exaly