Peters, RuthBooth, AndrewRockwood, KennethPeters, JeanD'Este, CatherineAnstey, Kaarin2019-07-232019-07-232044-6055http://hdl.handle.net/1885/164664Objective To systematically review the literature relating to the impact of multiple co-occurring modifiable risk factors for cognitive decline and dementia.RP is funded by the Australian Dementia Collaborative Research Centre. AB’s input into the literature search and review design was undertaken under his University of Sheffield employment contract. KR is funded through the Dalhousie Medical Research Foundation as the Kathryn Allen Weldon Professor of Alzheimer’s Research and receives research funding from the Canadian Institutes of Health Research, the Canadian Frailty Network and the Fountain Family Research Fund of the Queen Elizabeth II Health Sciences Centre. JP received no support from any organisation for the submitted work. KJA is funded by NHMRC Fellowship APP1102694.application/pdfen-AU© Author(s) (or their employer(s)) 2019.http://creativecommons.org/licenses/by-nc/4.0/201910.1136/bmjopen-2018-0228462019-03-31Creative Commons Attribution Non Commercial (CC BY-NC 4.0)