Association between mobile phone use and incidence of dementia: A prospective cohort study using the UK Biobank

Authors: Zhao H, Wen Q, Zhuo L, Wang S, Zhan S

Year: 2023 Jul 26

Category: Epidemiology

Journal: Gerontology

DOI: 10.1159/000531847

URL: https://pubmed.ncbi.nlm.nih.gov/37494916/

Abstract

Overview

This study investigates the potential relationship between daily mobile phone use and the risk of developing dementia, using extensive data from the UK Biobank. With the widespread adoption of mobile phones, questions have risen about possible long-term health effects, especially concerning neurodegenerative diseases due to electromagnetic field (EMF) exposure.

Methods

  • Participants: UK Biobank adults aged 60+ without dementia at study entry.
  • Analysis: A prospective cohort approach with Cox regression models, adjusting for sociodemographic, health, mental, lifestyle, and medication factors.
  • Population: 213,181 individuals, monitored over a median of 12.4 years.

Findings

  • During the follow-up, 6,344 new dementia cases were recorded.
  • Mobile phone use was linked to a modestly lower risk of dementia compared to non-users. Hazard ratios (HRs) for incident dementia were:
    • <5 minutes/week: HR 0.85 (95% CI: 0.79-0.91)
    • 5-29 minutes/week: HR 0.85 (95% CI: 0.80-0.91)
    • 30-59 minutes/week: HR 0.78 (95% CI: 0.71-0.86)
    • 1-3 hours/week: HR 0.86 (95% CI: 0.77-0.96)
    • >3 hours/week: HR 0.83 (95% CI: 0.70-0.98)
  • Social engagement through family/friend visits and other activities accounted for part of the observed association.

Conclusion

Daily mobile phone use among community-dwelling older adults was significantly associated with a reduced risk of developing dementia in this large UK population study. The findings suggest benefits mediated by increased social and mental activity, though it's important to recognize ongoing public concerns regarding EMF and its potential health impacts. Research continues to monitor the connection between electromagnetic field exposure and neurological health risks.

mobile phones dementia electromagnetic fields cohort study UK Biobank social activity cognitive health
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