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Related Experiment Videos

Serum cotinine level and incident hearing loss: a case-control study.

David M Nondahl1, Karen J Cruickshanks, Dayna S Dalton

  • 1Department of Ophthalmology and Visual Sciences, The University of Wisconsin-Madison, USA. nondahl@epi.ophth.wisc.edu

Archives of Otolaryngology--Head & Neck Surgery
|November 17, 2004
PubMed
Summary

This study found no link between serum cotinine levels and new cases of hearing loss. Further longitudinal research is needed to clarify the relationship between smoking and hearing impairment.

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Area of Science:

  • Audiology
  • Epidemiology
  • Toxicology

Background:

  • Growing evidence links cigarette smoking to hearing loss.
  • Serum cotinine is a reliable biomarker for tobacco smoke exposure.

Purpose of the Study:

  • To investigate the association between serum cotinine levels and the incidence of hearing loss.

Main Methods:

  • Cross-sectional, incident, case-control study.
  • 197 participants with incident hearing loss and 394 controls (aged 53-75) from a population-based cohort.
  • Hearing loss defined by pure-tone average thresholds at 500-4000 Hz > 25-dB HL.

Main Results:

  • No significant associations were observed between serum cotinine levels and incident hearing loss.

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Conclusions:

  • Findings contradict previous reports suggesting links between smoking and prevalent hearing loss.
  • Longitudinal studies are recommended to further explore smoking's impact on hearing loss development.