What is the study about?

INTERVAL-GB (Imaging timing after surgery for glioblastoma- an evaluation of practice in Great Britain) is a retrospective, multicentre audit seeking to determine: (1) MRI surveillance practice in the UK and Ireland after surgery for patients with glioblastoma, and (2) adherence to NICE guidelines. This is a NANSIG-led and BNTRC supported study, and will run over 6 months from November 15th 2021, to 15th May 2022.

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Pilot data

The pilot study for INTERVAL was undertaken at three neurosurgical centres, and successfully confirmed the feasibility and acceptability of the project. The preliminary results will be released soon.

Project update: September 2021

Project sign up for data collaborators for INTERVAL-GB is now open! We are looking for motivated medical students and junior doctors interested in Neurosurgery or Neuro-Oncology to help with the study as data collaborators. The project will require approximately 10-20 hours of time to complete, and will be a very useful addition to any portfolio. Furthermore, involvement in INTERVAL-GB as a data collaborator will greatly strengthen future applications to NANSIG Core committee, and is a great way to get involved with NANSIG, and your local neurosurgery departments. The study protocol, which has been reviewed by the BNTRC, can be found below.

To apply to be a data collaborator for INTERVAL-GB, please complete the application form below. Applications will close at 23:59 BST on Friday 15th October 2021.  Previous experience or involvement in research projects is not required. INTERVAL-GB is an international study, and we are hoping to have involvement from every UK and Ireland Neurosurgical centre.

If you have any questions, please contact us on twitter,, or any of the NANSIG platforms. We look forward to hearing from you!