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[Correspondence] Prevention of dementia by targeting risk factors

The report by Gill Livingston and colleagues (Dec 16, 2017 p 2673)1 is a valuable collation of a large body of medical research evidence that aims to combat the dementia epidemic, the greatest global challenge for health and social care in the 21st century. One of the key messages of the Commission is the need to be ambitious in terms of prevention. Using population attributable fractions (PAF), the authors estimate that as much as 35% of dementia cases could be prevented by targeting nine modifiable risk factors.