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Analysis of a hearing conservation program data base: factors other than workplace noise.

Authors
Franks-JR; Davis-RR; Kreig-EF Jr.
Source
Ear Hear 1989 Oct; 10(5):273-280
NIOSHTIC No.
00204424
Abstract
Factors contributing to standard threshold shifts (STSs) other than workplace noise exposure were examined. The study material consisted of sequential audiograms of 1693 employees at six sites of a large publishing company who were in a hearing conservation program. The data were analyzed to assess the effects of occupational noise exposure, nonoccupational noise exposures, self reported medical conditions, sex, and age on the STS according to OSHA criteria. OSHA considered an STS to be an average change in hearing threshold of 10 decibels or more occurring in either ear at 2000, 3000, or 4000 hertz relative to the baseline audiogram. Noise exposures at the worksites ranged from 88 to 92 decibels-A (dBA), average 90dBA. Increases in STS were not significantly related to occupational noise exposure. Males were more likely to develop increases in STS than females. Females who showed increases in STS were older than males who developed STSs. Hypertension, histories of head injury, high fever, and measles, and participating in hunting and shooting were significantly associated with increases in STS. Employees who had impaired hearing when they entered a hearing conservation program were more likely to show increases in STS than those with normal hearing. The authors conclude that factors outside the work environment can contribute to increases in STS. When evaluating the effect of noisy workplace environments, companies should assess each employee individually according to his medical history and nonoccupational noise exposures.
Keywords
NIOSH-Author; Noise-induced-hearing-loss; Printing-industry; Occupational-health-programs; Occupational-exposure; Environmental-exposure; Hearing-threshold; Sex-factors; Noise-exposure
CODEN
EAHEDS
Publication Date
19891001
Document Type
Journal Article
Fiscal Year
1990
NTIS Accession No.
NTIS Price
Issue of Publication
5
ISSN
0196-0202
NIOSH Division
DBBS
Priority Area
Noise-induced-hearing-loss
Source Name
Ear and Hearing
State
OH
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