We provide a central randomisation service for studies conducted in Australia or overseas, in either academic research institutions or industry. A range of service types are available depending on the size of the trial and the budget.

Types of randomisation services

Email and/or phone operator (manual):

  • for small studies (20-40 patients)
  • available during CTC business hours only

Interactive voice response system (IVRS):

  • immediate response
  • collects and responds to caller inputs
  • available 24 hours a day, 7 days a week
  • optional fax and email confirmations for each randomisation
  • automatic allocation of kits or devices
  • 24-hour emergency unblinding and backup service

Web-based system:

  • A web-based system is available for large trials. It is possible to combine the IVRS and web access methods.


Manual service:

  • approx $20 per patient plus set-up and management fees

Automated services:

  • approx $10 per patient, depending on access or confirmation required
  • higher set-up costs (starting from $2000)


A range of methods is available, but most commonly we use minimisation. Stratified blocks are available upon request.

The most appropriate method will be determined after detailed discussion with a statistician and will be based on your trial size, stratification factors and any practical requirements.