Evidence map›Paper›PMID 30732633›Full record

ArticleHealth and quality of life outcomes2019

Psychometric properties of the Epworth sleepiness scale in Ethiopian university students.

Md Dilshad Manzar, Mohammed Salahuddin, Majed Alamri, Abdulrhman Albougami, Mohammad Yunus Ali Khan, Dejen Nureye, D Warren Spence, Seithikurippu R Pandi-Perumal

Open access · goldAbstract readValidation Study
In one paragraph

Article in Health and quality of life outcomes, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed, 1 pooled it
3.8field-weighted citation impact, top 7% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

27 citing papers in PubMed, 1 synthesis or guideline pooled it, 46 citations in OpenAlex.

  1. Measuring Subjective Sleep Quality: A Review.International journal of environmental research and public health · 2021
    Pooled it
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  3. The ventilatory response to arousal from sleep is elevated in young individuals with post-traumatic stress disorder symptoms.Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine · 2026
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 2 institutions in 2 countries.

Md Dilshad ManzarDepartment of Nursing, College of Applied Medical Sciences, Majmaah University, Majmaah, 11952, Saudi Arabia.
Mohammed SalahuddinDepartment of Pharmacy, College of Medicine and Health Sciences, Mizan-Tepi University (Mizan Campus), Mizan-Aman, Ethiopia. salahuddin.mmohammed@gmail.com.
Majed AlamriDepartment of Nursing, College of Applied Medical Sciences, Majmaah University, Majmaah, 11952, Saudi Arabia.
Abdulrhman AlbougamiDepartment of Nursing, College of Applied Medical Sciences, Majmaah University, Majmaah, 11952, Saudi Arabia.
Mohammad Yunus Ali KhanBiomedical Sciences, College of Medicine and Health Sciences, Mizan-Tepi University (Mizan Campus), Mizan-Aman, Ethiopia.
Dejen NureyeDepartment of Pharmacy, College of Medicine and Health Sciences, Mizan-Tepi University (Mizan Campus), Mizan-Aman, Ethiopia.
D Warren SpenceIndependent researcher, 652 Dufferin Street, Toronto, ON, M6K 2B4, Canada.
Seithikurippu R Pandi-PerumalSomnogen Canada Inc., College Street, Toronto, ON, Canada.
Majmaah University · SAMizan Tepi University · ET

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundDaytime sleepiness is highly prevalent across the globe. The Epworth sleepiness scale (ESS) is the most widely used tool for screening daytime sleepiness. The psychometric properties of the ESS have not been comprehensively examined in African populations. MATERIAL AND

methodsA cross-sectional design with simple random sampling was used in the present study. The study recruited 600 students from Mizan-Tepi University, Ethiopia, of which 329 (age = 18-28 years and body mass index = 21.19 ± 3.17 kg/m

resultsAll except one item of the ESS showed a floor effect, while only one item score showed ceiling effect. However, no ceiling/floor effect was observed in the ESS total score. The Cronbach's alpha (0.75) and composite reliability (0.75), indicated good internal consistency, while a moderate item-total score correlation (r = 0.55-0.67) implied favorable internal homogeneity. The known-group validity was established by significantly higher scores for all the ESS item scores and the ESS total scores among those with symptoms of insomnia than among non-symptomatic students. Fit indices along with the consideration of inter-factor correlation coefficient, measures of item retention favored the unidimensional structure of the ESS.

conclusionThe ESS has excellent psychometric validity for screening daytime sleepiness in Ethiopian university students.

Indexed as

SleepinessAdultCross-Sectional StudiesEthiopiaFemaleHumansMalePsychometricsQuality of LifeReproducibility of ResultsSleep Wake DisordersStudentsSurveys and QuestionnairesUniversitiesYoung AdultDaytime sleepinessESSFloor effectInsomniaKnown-group validity

Identifiers

PMID30732633
PMCPMC6367806
OpenAlexW2921164219

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.