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sample size

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Tutorials and Fundamentals

Cluster Randomized Trials: Concepts

This blog summarizes the concepts of cluster randomization, and the logistical and statistical considerations while designing a cluster randomized controlled trial.

Tutorials and Fundamentals

No power, no evidence!

An introduction to the role of statistical power in the search for evidence.

Tutorials and Fundamentals

Sample size matters – even more than you think

A meta-epidemiological study published in the BMJ last month has found that smaller trials consistently report larger effect sizes.

sample size

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Cluster Randomized Trials: Concepts

No power, no evidence!

Sample size matters – even more than you think

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