Main Findings
Over half of the trials (58%) in the specialised register published from 2010 -2011 were not being disseminated in Cochrane SRs and as such could be considered wasted evidence. Of the unused trials 45% of these could be used if an existing review was updated. Cochrane review authors are encouraged to update their review every two years(16) and it is surprising to find a large number of trials of this age that have not been incorporated into CGF SRs. In this project we have identified the reviews that each of these trials could fit and they will be prioritised and updated accordingly.