Intended for healthcare professionals

Letters Physical inactivity and cognitive health

Postmodern epidemiology: public health informed by evidence

BMJ 2019; 365 doi: https://doi.org/10.1136/bmj.l2379 (Published 04 June 2019) Cite this as: BMJ 2019;365:l2379
  1. Arnaud Chiolero, public health physician and epidemiologist
  1. Institute of Primary Health Care (BIHAM), University of Bern, CH-3012 Bern, Switzerland
  1. achiolero{at}gmail.com

Kivimäki and colleagues show that physical activity probably has no effect on dementia risk.1 This is bad news for population health, as there was hope that physical activity could help prevent dementia.2 But it …

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