Abstract Objective/Background: The Epworth Sleepiness Scale (ESS) is one of the most
used self-reported instruments to assess sleepiness. Thus, several adaptations into different …

Untreated sleep disordered breathing (obstructive sleep apnea and/or central sleep apnea)
are an important cause of medical mortality and morbidity. OSA is characterized by recurrent …

Background and Purpose The purposes of this study were to standardize and validate a
Korean version of the Insomnia Severity Index (ISI-K), and to evaluate its clinical usefulness …

Abstract Purpose The Pittsburgh Sleep Quality Index (PSQI) is a self-reported questionnaire
that measures sleep quality during the previous month. The aims of this study were to …

Smartphones deliver light to users through Light Emitting Diode (LED) displays. Blue light is
the most potent wavelength for sleep and mood. This study investigated the immediate …

Objective A validated measure of daytime sleepiness for adolescents is needed to better
explore emerging relationships between sleepiness and the mental and physical health of …

Objectives To compare the accuracy of the commercial Fitbit Flex device (FF) with
polysomnography (PSG; the gold-standard method) in insomnia disorder patients and good …

Purpose The main purpose of this study was to assess the reliability and validity of the
Iranian version of the Epworth Sleepiness Scale (ESS-IR). Methods This was a cross …

Study Objectives: Obstructive sleep apnea (OSA) and chronic insomnia are two common
sleep disorders and both are considered independent risk factors for heart disease. The aim …

Aim We systematically reviewed the quality of sleep measurement instruments applied to
shift-work nurses and analyzed the effects of intervention research. Background There is a …