Sleep quality in noise exposed Brazilian workers.

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dc.contributor.authorRios, Ana Luciaen_US
dc.contributor.authorda Silva, Geruza Alvesen_US
dc.date.accessioned2005-10-05en_US
dc.date.accessioned2009-06-03T14:44:19Z
dc.date.available2005-10-05en_US
dc.date.available2009-06-03T14:44:19Z
dc.date.issued2005-10-05en_US
dc.description.abstractThis study investigated the effect of chronic workplace exposure to excessive noise on sleep quality. It involved 40 male workers aged 33 to 50 years, 20 of whom had been exposed to environmental workplace noise levels of 85 dB or more on 40-hour-a-week jobs. Another 20 workers who were not exposed to excessive noise were used as controls. All subjects were interviewed and submitted to physical examination, pure tone and speech audiometry, immittance testing and nocturnal polysomnography. Comparative analysis demonstrated that the two groups were similar, except for the exposure to noise. Fisher's test comparison of pure tone and speech audiometry and immittance testing revealed mild to moderate noise-induced hearing loss (P < 0.001) in the > or = 85-dB group. Indicators of sleep continuity were abnormal in both groups, demonstrating poor sleep quality; however, sleep quantity was normal. Of the 40 individuals, 13 (32.5%) presented respiratory sleep disorders. Of those 13, 10 presented daytime somnolence according to the Epworth Scale. The Mann-Whitney test showed that sleep was identical in the two groups. Fisher's exact test revealed no association between altered sleep and hearing status in either group. Our results show that active men working 40-hour-a-week in the presence of excessive noise without adequate protection for more than eight years presented with noise-induced hearing loss but their quality or quantity of night sleep was unaffected. Sensori-neural deafness may represent an element of adaptation against noise during sleep.en_US
dc.description.affiliationDivision of Pulmonology, Department of General Medicine, University of São Paulo School of Medicine at Ribeirão Preto - São Paulo, Brazil.en_US
dc.identifier.citationRios AL, da Silva GA. Sleep quality in noise exposed Brazilian workers. Noise & Health. 2005 Oct-Dec; 7(29): 1-6en_US
dc.identifier.urihttps://imsear.searo.who.int/handle/123456789/122112
dc.language.isoengen_US
dc.source.urihttps://www.noiseandhealth.orgen_US
dc.subject.meshAdulten_US
dc.subject.meshAudiometry, Pure-Toneen_US
dc.subject.meshAudiometry, Speechen_US
dc.subject.meshBrazilen_US
dc.subject.meshCase-Control Studiesen_US
dc.subject.meshEar Protective Devices --utilizationen_US
dc.subject.meshHearing Loss, Noise-Induced --diagnosisen_US
dc.subject.meshHumansen_US
dc.subject.meshInterviews as Topicen_US
dc.subject.meshMaleen_US
dc.subject.meshMiddle Ageden_US
dc.subject.meshNoise, Occupational --adverse effectsen_US
dc.subject.meshOccupational Diseases --etiologyen_US
dc.subject.meshPhysical Examinationen_US
dc.subject.meshPolysomnographyen_US
dc.subject.meshSleep --physiologyen_US
dc.subject.meshSleep Disorders --diagnosisen_US
dc.titleSleep quality in noise exposed Brazilian workers.en_US
dc.typeComparative Studyen_US
dc.typeJournal Articleen_US
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