The first IIH:WT trial participant was randomised on 25th July 2014 and the last participant was randomised on 25th May 2017.

The first control participant was registered on 6th March 2014.

IIH:WT aimed to recruit 64 randomised participants and 45 control participants over a period of 4 years from Queen Elizabeth Hospital Birmingham, Royal Devon and Exeter, Manchester Royal Eye Hospital, and other NHS trusts across the UK. Recruitment figures updated 25th March 2019.

 IIH Weight Trial recruitment table
Date first participant randomised 25/07/2014
Date first control participant registered 06/03/2014
Total randomised recruitment to date 66
Total control recruitment to date 73
Total number of centres with approval to recruit or refer participants