ArticleJournal of clinical neurology (Seoul, Korea)2024
Validation of the Karolinska Sleepiness Scale in Korean.
Article in Journal of clinical neurology (Seoul, Korea), 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
What it found
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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.
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.
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Who cites it
3 citing papers in PubMed.
- The intervention effect of caffeine oral tablets on mental fatigue induced by nap deprivation: based on assessments of heart rate variability, cognitive performance and subjective fatigue-a pilot study.Frontiers in public health · 2026Article
- Mental Fatigue Detection of Crane Operators Based on Electroencephalogram Signals Acquired by a Novel Rotary Switch-Type Semi-Dry Electrode Using Multifractal Detrend Fluctuation Analysis.Sensors (Basel, Switzerland) · 2025Article
- Impact of Noise from Heat Pumps on Sleep, Noise Annoyance, and Concentration in Healthy Adults in a Laboratory Setting.Noise & healthArticle
Corrections and comments
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Authors and funding
5 authors.
Funding
Abstract
background and purposeThe Karolinska Sleepiness Scale (KSS) is widely used for assessing current level of sleepiness, but it has not been validated in South Korea. This study aimed to validate the KSS using the Stanford Sleepiness Scale (SSS), polysomnography (PSG), and electroencephalography (EEG).
methodsThe sample consisted of 27 adult participants in this study aged 40.5±7.7 years (mean±standard deviation) and included 22 males. They completed questionnaires and underwent EEG recording and overnight PSG. The KSS was completed from 18:00 to 24:00 every 2 hours and following PSG (at 07:00). KSS scores changed over time and in particular increased with the time since waking, with the score peaking at 24:00.
resultsConvergent validity of the KSS was verified by performing a Spearman correlation analysis between the KSS and SSS (
conclusionsThis study verified the convergent validity and concurrent validity of the KSS, and confirmed the capabilities of this scale in assessing sleepiness changes over time.
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Registered trials
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