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

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

(2014) Ellen C Lee et al.   BMC Medical Research Methodology

Pilot and feasibility studies: Is there a difference from each other and from a randomised controlled trial?

(2014) Amy L. Whitehead et al.   Contemporary Clinical Trials

Sample size requirements to estimate key design parameters from external pilot randomised controlled trials: a simulation study

(2014) M Teare et al.   Trials

The size of a pilot study for a clinical trial should be calculated in relation to considerations of precision and efficiency

(2011) Julius Sim et al.   JOURNAL OF CLINICAL EPIDEMIOLOGY

What is a pilot or feasibility study? A review of current practice and editorial policy

(2010) Mubashir Arain et al.   BMC Medical Research Methodology

A tutorial on pilot studies: the what, why and how

(2010) Lehana Thabane et al.   BMC Medical Research Methodology