The Epworth Sleepiness Scale: Validation of One-Dimensional Factor Structure in a Large Clinical Sample.

ABSTRACT:

Study objectives

The Epworth Sleepiness Scale (ESS) is used by clinicians and researchers to determine level of daytime sleepiness. The number of factors included in the scale has been debated. Our study objective was to clarify the dimensionality of the ESS using a large clinical sample.

Methods

A retrospective cohort study included all patients presenting for care in a tertiary care sleep disorders center who answered all items on the ESS from January 8, 2008 to September 28, 2012. Dimensionality was assessed using scree plot, eigenvalues, factor loadings, principal factor analysis, and confirmatory factor analysis. Multigroup confirmatory factor analysis (MGCFA) evaluated dimensionality within 10 subgroups of clinical interest.

Results

The mean age of the 10,785 st

SUBMITTER: Lapin BR 

PROVIDER: S-EPMC6086944 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature