David Armstrong

DELTA2 guidance on choosing the target difference and undertaking and reporting the sample size calculation for a randomised controlled trial

R. Emsley, J. A. Cook, C. Hewitt, 2018, Trials.

Practical help for specifying the target difference in sample size calculations for RCTs: the DELTA2 five-stage study, including a workshop.

Lisa V. Hampson, R. Emsley, C. Hewitt, 2019, Health technology assessment.

DELTA 2 guidance on choosing the target difference and undertaking and reporting the sample size calculation for a randomised controlled trial

R. Emsley, C. Hewitt, D. Altman, 2018 .

DELTA guidance on choosing the target difference and undertaking and reporting the sample size calculation for a randomised controlled trial

R. Emsley, J. A. Cook, C. Ramsay, 2018 .

Are some feasibility studies more feasible than others? A review of the outcomes of feasibility studies on the ISRCTN registry

S. Ziebland, David Armstrong, J. Hejdenberg, 2021, Pilot and Feasibility Studies.

DELTA2 guidance on choosing the target difference and undertaking and reporting the sample size calculation for a randomised controlled trial

David Armstrong, Lisa V Hampson, Nigel Stallard, 2018, British Medical Journal.

DELTA2 guidance on choosing the target difference and undertaking and reporting the sample size calculation for a randomised controlled trial

Lisa V. Hampson, R. Emsley, C. Hewitt, 2018, British Medical Journal.