Key risk factors

Nine potentially modifiable risk factors were identified by the Lancet Commission in 2017

  • Less education
  • Hypertension
  • Hearing impairment
  • Smoking
  • Obesity
  • Depression
  • Physical inactivity
  • Diabetes
  • Low social contact

Their most recent report, published in 2020 added three more risk factors for dementia with newer and convincing evidence (Livingston et al., 2020)

  • Excessive alcohol consumption
  • Traumatic brain injury
  • Air pollution

Together these 12 modifiable risk factors account for around 40% of dementias around the world, which could, in theory be prevented or delayed (Livingston et al., 2020).