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A psychometric analysis of the Epworth Sleepiness Scale.

Authors
Heaton-K; Anderson-D
Source
J Nurs Meas 2007 Jan; 15(3):177-188
NIOSHTIC No.
20033240
Abstract
Psychometric performance of the Epworth Sleepiness Scale (ESS) has not been evaluated in groups of workers. This study evaluated its use in a sample of 843 long-haul truckers. Interitem correlations and Cronbach's alpha were conducted. Correlation of the ESS with the sleep problems subscale of the Trucker Strain Monitor (TSM) was performed. Dimensionality was evaluated using factor analysis. Cronbach's alpha (.79) was strong. Interitem correlations were significant. A weak but significant correlation between the ESS and TSM sleep problems subscale (r = .18, p = < .001) was shown. Factor analysis yielded two factors that explained 56.2% of scale variance. The ESS performed well in the current sample. It is an inexpensive, time/cost-effective instrument. It should be considered for use in studies of workers in naturalistic settings.
Keywords
Truck-drivers; Trucking; Sleep-deprivation; Shift-work; Drivers; Work-intervals; Work-performance; Work-practices; Worker-motivation; Humans; Author Keywords: Epworth Sleepiness Scale; Psychometrics; Sleep; Truck Drivers; Trucker Strain Monitor
Contact
University of Kentucky, Lexington 40215
Publication Date
20070101
Document Type
Journal Article
Email Address
karen.heaton@uky.edu
Funding Type
Grant
Fiscal Year
2007
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-007931
Issue of Publication
3
ISSN
1061-3749
Source Name
Journal of Nursing Measurement
State
KY
Performing Organization
University of Kentucky
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