The GRADE Working Group clarifies the construct of certainty of evidence

The authors would like to thank colleagues at the Swedish Agency for Health Technology Assessment and Assessment of Social Services (SBU) who, through participating in a series of seminars, contributed with valuable input on the initial draft of the presented approaches. The authors also thank all GRADE Working Group members who have contributed to the paper during group discussions at Grade Working Group meetings. The Health Services Research Unit, University of Aberdeen, receives core funding from the Chief Scientist Office of the Scottish Government Health Directorates. The Parker Institute, Bispebjerg and Frederiksberg Hospital is supported by a core grant from the Oak Foundation (OCAY-13-309). SVK is funded by a NRS Scottish Senior Clinical Fellowship (SCAF/15/02), the Medical Research Council (MC_UU_12017/13 & MC_UU_12017/15) and Chief Scientist’s Office (SPHSU13 & SPHSU15).Peer reviewedPublisher PD

Flow diagram showing the literature search strategy.

<p>Flow diagram chart showing the literature search strategy with the number of retrieved abstracts, included and excluded articles.</p