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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!)