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Our data management and statistics teams can provide advice in the methodology for randomisation and unblinding, and set up of the clinical trial randomisation system.

Services at Derby CTU include:

  • development of randomisation methodology and specification
  • simulation of randomisation method to check balance across stratification factors
  • building and testing a randomisation system, electronic, telephone or paper
  • maintain the randomisation system and unblinding procedures
  • providing automated email alerts (blind or unblind) for each randomisation event
  • providing reports, blinded and unblinded, of group allocation

We can provide an online randomisation using the integrated module within our electronic data capture (EDC) system, Dacima™ Software, or independently to our EDC using Sealed Envelope Ltd © for any study design, including cross-over and double blinded Randomised Controlled Trials. Both systems can be accessed 24 hours a day. We also have experience in setting up a paper based randomisation using sealed envelopes for studies where the online randomisation is not feasible.

Visit the Sealed Envelope Ltd website (opens in new window) >

Methods of randomisation supported by our CTU include, but are not limited to:

  • simple randomisation
  • mixed blocks randomisation
  • stratified randomisation
  • minimisation

Please get in touch with us as soon as you have a research idea so as to get the appropriate support.

Contact us


Derby Clinical Trials Support Unit
Medical School, Office 5033
Royal Derby Hospital
DE22 3DT