Steven A. Julious

Sample size of 12 per group rule of thumb for a pilot study

Steven A. Julious · Pharmaceutical Statistics · 2005 · 2.9K citations

Group Rule, Generalizability Theory, Sampling Technique +16

Estimating the sample size for a pilot randomised trial to minimise the overall trial sample size for the external pilot and main trial for a continuous outcome variable

Amy Whitehead, Steven A. Julious, Cindy Cooper et al. · Statistical Methods in Medical Research · 2015 · 1.7K citations · Full text

Sample Size Justification, Meta-analysis, Engineering +14

Reducing waste from incomplete or unusable reports of biomedical research

Paul Glasziou, Douglas G. Altman, Patrick M. Bossuyt et al. · The Lancet · 2014 · 1.3K citations

Biomedical Research, Biobank, Laboratory Medicine +7

An audit of sample sizes for pilot and feasibility trials being undertaken in the United Kingdom registered in the United Kingdom Clinical Research Network database

Sophie Billingham, Amy Whitehead, Steven A. Julious · BMC Medical Research Methodology · 2013 · 906 citations · Full text

The statistical interpretation of pilot trials: should significance thresholds be reconsidered?

Ellen Lee, Amy Whitehead, Richard Jacques et al. · BMC Medical Research Methodology · 2014 · 421 citations · Full text