For information on study design

  • For an introduction to various study designs and what type of research questions they can address, please see a BMJ article series: How to read a paper
  • NIHR’s Clinical trials tool kit provides practical advice to researchers in designing and conducting publicly funded clinical trials in the UK
  • MRC Complex interventions guidance provides advice on the development, evaluation and implementation of complex interventions
  • NICE Behaviour change: general approaches (2007) provides a set of generic principles that can be used for planning, delivering and evaluating behaviour change interventions.
  • MRC published guidance on Using natural experiments to evaluate population health interventions for producers and users of evidence provides guidance on how and when ‘natural experiments’ can be used to good effect. See their website for more information.

For an introduction to qualitative research:

For an introduction on how to synthesis qualitative and quantitative evidence:

For an introduction on how to design a pilot study: 

To understand the difference between a pilot and a feasibility study: 

For guidance on evaluating surgical innovations, see the IDEAL framework: