A further systematic review indicates that unhealthy behaviours tend to increase dementia risk. Pooled meta-analysis of previous research demonstrate a 20% increase in the risk of dementia from one risk factor, while the co-occurrence of three risk factors doubles the risk of dementia.
“ … findings showed a significant increase in the risk of a dementia diagnosis when three known risk factors were present; this doubled the likelihood of dementia. There was also a reduction in risk conveyed by having fewer risk factors… ”.
Wagg, A. (2019). A less healthy lifestyle increases the risk of dementia. London: NIHR Signal / NIHR Dissemination Centre, November 26th 2019.
This relates to:
Peters, R. Booth, A. [and] Rockwood, K. [et al] (2019). Combining modifiable risk factors and risk of dementia: a systematic review and meta-analysis. BMJ Open. January 25th 2019; Vol.9(1): e022846.