ArticleAnnals of thoracic medicine2012
Sleep architecture of consolidated and split sleep due to the dawn (Fajr) prayer among Muslims and its impact on daytime sleepiness.
Article in Annals of thoracic medicine, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 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.
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Who cites it
6 citing papers in PubMed, 26 citations in OpenAlex.
- Effectiveness of Combination Dhikr and Salawat on Anxiety and Sleep Quality in Hemodialysis Patients in Indonesia: A Randomized Controlled Trial.Journal of religion and health · 2025Trial
- Sleep Patterns and Quality among Young Adults of Karachi, Pakistan.Journal of circadian rhythms · 2026Article
- Sleep Quality, Patterns, and Their Impact on Cardiovascular Disease Risk: A Cross-sectional Study Among Omani Adults Attending Primary Healthcare in Muscat.Oman medical journal · 2025Article
- Sleep Patterns and Quality in Omani Adults.Nature and science of sleep · 2020Article
- Qur'anic insights into sleep.Nature and science of sleep · 2012Article
- Joint consensus statement of the Saudi Public Health Authority on the recommended amount of physical activity, sedentary behavior, and sleep duration for healthy Saudis: Background, methodology, and discussion.Annals of thoracic medicineArticle
Corrections and comments
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Authors and funding
4 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundMuslims are required to wake up early to pray (Fajr) at dawn (approximately one and one-half hours before sunrise). Some Muslims wake up to pray Fajr and then sleep until it is time to work (split sleep), whereas others sleep continuously (consolidated sleep) until work time and pray Fajr upon awakening.
aimTo objectively assess sleep architecture and daytime sleepiness in consolidated and split sleep due to the Fajr prayer. SETTING AND
designA cross-sectional, single-center observational study in eight healthy male subjects with a mean age of 32.0 ± 2.4 years.
methodsThe participants spent three nights in the Sleep Disorders Center (SDC) at King Khalid University Hospital, where they participated in the study, which included (1) a medical checkup and an adaptation night, (2) a consolidated sleep night, and (3) a split-sleep night. Polysomnography (PSG) was conducted in the SDC following the standard protocol. Participants went to bed at 11:30 PM and woke up at 7:00 AM in the consolidated sleep protocol. In the split-sleep protocol, participants went to bed at 11:30 PM, woke up at 3:30 AM for 45 minutes, went back to bed at 4:15 AM, and finally woke up at 7:45 AM. PSG was followed by a multiple sleep latency test to assess the daytime sleepiness of the participants.
resultsThere were no differences in sleep efficiency, the distribution of sleep stages, or daytime sleepiness between the two protocols.
conclusionNo differences were detected in sleep architecture or daytime sleepiness in the consolidated and split-sleep schedules when the total sleep duration was maintained.
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