Sample size

• 2016/03/30 Recommendation: Reporting and methodological quality of sample size calculations in cluster randomized trials could be improved: a review
• 2016/03/30 Recommendation: The number of subjects per variable required in linear regression analyses
• 2016/02/05 PMean: Calculating power for a test of association in a two by two table
• 2016/02/05 PMean: Simulating power for a test of association in a two by two table
• 2015/09/24 Recommendation: PS: Power and Sample Size Calculation
• 2014/12/10 Recommendation: Requiring fuel gauges. A pitch for justifying impact evaluation sample size assumptions
• 2014/08/13 Recommendation: Sample size of 12 per group rule of thumb for a pilot study
• 2014/07/22 PMean: An example of a simple sample size justification
• 2014/06/16 Recommendation: MLPowSim software
• 2014/02/10 Recommendation: Why randomized controlled trials fail but needn’t: 2. Failure to employ physiological statistics, or the only formula a clinician-trialist is ever likely to need (or understand!)