Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 362

The DOI matches its Crossref record; 23 of the 23 references it cites were found in a registry or an index.

The reliability and validity of the Korean version of the Epworth sleepiness scale

Open access
Cho, Yong Won, Lee, Joo Hwa, Son, Hyo Kyung, Lee, Seung Hoon, Shin, Chol, Johns, Murray W.·2011·Sleep and Breathing

Abstract

ObjectiveThe Epworth sleepiness scale (ESS) is widely used to measure the subject's average sleep propensity across those different situations in daily life, particularly in patients with sleep-disordered breathing. The purposes of this study were to test the hypothesis that the Korean version of the ESS (KESS) is valid and evaluate its usefulness.Materials and methodsWe developed the KESS, which involved translating into Korean and then translating back into English to check its accuracy. A total of 273 participants (181 obstructive sleep apnea (OSA)—37 mild, 61 moderate, 83 severe, 32 simple snoring and 60 normal) were included in this study. All subjects completed the overnight polysomnograph and 53 of the total subjects were randomly selected for a retest with the questionnaire approximately 2∼4 weeks later. The associations between KESS and the degree of OSA were examined through ANCOVA, adjusted for age, sex and BMI.ResultsThe total score and each item's score of KESS in patients with OSA were significantly higher than subjects with normal controls (p < 0.01). As the severity of OSA increased, the KESS showed significantly increasing patterns (p for trend <0.01). The KESS in patient groups showed good internal consistency (Cronbach's α = 0.90) and test–retest reliability (r = 0.78 to 0.93).ConclusionThe KESS is a reliable and valid tool for screening patients with daytime sleepiness in Korea.

Overview

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1007/s11325-010-0343-6

Cites

23 of 23 references verified0 citation errors · 0 not checkable

Statistics

Verification

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Citations

Cites

Show all 23 references

Cited by

See all 362

Metadata

Authors
Cho, Y. W., Lee, J. H., Son, H. K., Lee, S. H., Shin, C., & Johns, M. W.
Venue
Sleep and Breathing
Published
2010-04-01
Volume
15
Issue
3
Pages
377-384
ISSN
  • 1520-9512 (ISSN-L)
  • 1522-1709
OpenAlex
W1966183340
Cited by
362
References
23
FWCI
5.52
Type
journal article
Language
en
Open access
green

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review

How to cite

Cite CoChat for the checks on this page, and the paper for its own findings.

This page
CoChat. (2026). Citation check: The reliability and validity of the Korean version of the Epworth sleepiness scale. https://app.cochat.ai/papers/10.1007/s11325-010-0343-6
The paper
Cho, Y. W., Lee, J. H., Son, H. K., Lee, S. H., Shin, C., & Johns, M. W. (2011). The reliability and validity of the Korean version of the Epworth sleepiness scale. Sleep and Breathing. https://doi.org/10.1007/s11325-010-0343-6

Data sources

Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.