Original sentence: Some have argued that the success of foundation trusts has been due to other factors
Edited sentence: In July 2011 the first fully independent study was published.In furtherance of an evidence-based NHS, it was only normal that a study of the effectiveness of decentralisation from State control would be undertaken.It remains to be seen if this way of lessening of State interference brings about any benefits which offset these greater costs of salaries and regulation.Now with data from a cohort of 137 FTs available for analysis, rather than the first few hospitals to achieve status, a more statistically meaningful picture can be seen.The initial promising results were thus not repeated by all the other trusts which eventually were given permission to become a foundation trust.This appears to support the opinions of the system's critics, in whose view, the only benefit was held by the trust board-members who would now be able to award their own pay increases, balanced against the down-side of having to administer a more costly system of regulation; these two combining to increase the total drain on the NHS coffers.This is also the likely reason that they were quick to gain trust status.This showed that the better figures recorded by the first trusts to reach foundation status were due to factors already in place before the introduction of the FT initiative