Study type: Epidemiological study

Association of Occupational Factors and Dementia or Cognitive Impairment: A Systematic Review and Meta-Analysis. epidem.

Published in: J Alzheimers Dis 2020; 78 (1): 217-227

Aim of study (acc. to author)

The associations between exposure to extremely low-frequency magnetic fields and other occupational risk factors (e.g., exposure to pesticides, solvents and metals, shift work, job strain) and the risk of dementia or mild cognitive impairment were evaluated in meta-analyses.

Further details

The following 12 publications on occupational magnetic field exposure were included: Qiu et al. (2004), Feychting et al. (2003), Röösli et al. (2007), Sorahan et al. (2014), Davanipour et al. (2007), Li et al. (2002), Noonan et al. (2002), Pedersen et al. (2017), Sobel et al. (1995), Graves et al. (1999), Park et al. (2005) and Savitz et al. (1988a).

Endpoint/type of risk estimation

Type of risk estimation: (relative risk (RR))



Study size

Type Value
Total 7,536,497

7690 participants in case-control studies and 7,528,807 participants in cohort studies

Statistical analysis method: ( adjustment: )

Conclusion (acc. to author)

A higher risk for dementia was observed among workers with occupational exposure to extremely low-frequency magnetic fields (in cohort studies: RR 1.26, CI 1.01–1.57; in case-control studies: RR 1.28, CI 1.06-1,54).
The authors concluded that occupational exposure to extremely low-frequency magnetic fields might elevate the risk for dementia.

Study funded by

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