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Sleep quality in noise exposed Brazilian workers
Ana Lucia Rios1, Geruza Alves da Silva
1Division of Pulmonology, Department of General Medicine, University of São Paulo School of Medicine at Ribeirão Preto - São Paulo, Brazil.
Noise & Health
|May 5, 2007
Summary
Chronic workplace noise exposure caused hearing loss in male workers but did not affect their sleep quality or quantity. This suggests potential adaptation to noise during sleep, despite abnormal sleep continuity indicators.
Area of Science:
- Occupational Health
- Sleep Medicine
- Audiology
Background:
- Chronic exposure to excessive workplace noise is a significant occupational hazard.
- Understanding the impact of noise on sleep quality is crucial for worker well-being.
- Previous research has not definitively linked noise exposure to sleep disturbances.
Purpose of the Study:
- To investigate the effects of chronic workplace noise exposure on sleep quality in male workers.
- To determine if noise-induced hearing loss correlates with altered sleep patterns.
- To explore potential adaptive mechanisms of hearing to noise during sleep.
Main Methods:
- Study involved 40 male workers (33-50 years), with 20 exposed to noise (≥85 dB) and 20 controls.
- Methods included interviews, physical exams, audiometry, immittance testing, and nocturnal polysomnography.
- Statistical analyses (Fisher's, Mann-Whitney) compared noise-exposed and control groups.
Main Results:
- Noise-exposed workers exhibited mild to moderate noise-induced hearing loss (P < 0.001).
- Both groups showed abnormal sleep continuity, indicating poor sleep quality, but normal sleep quantity.
- No association was found between altered sleep and hearing status.
Conclusions:
- Chronic excessive workplace noise exposure leads to hearing loss but does not significantly impact sleep quality or quantity.
- Poor sleep continuity indicators were present in both groups, irrespective of noise exposure.
- Sensori-neural deafness might be an adaptive response to noise during sleep.
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