ArticleSingapore medical journal2018
Sleep, activity and fatigue reported by Postgraduate Year 1 residents: a prospective cohort study comparing the effects of night float versus the traditional overnight on-call system.
Article in Singapore medical journal, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 2 of them syntheses that pooled it.
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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.
Who cites it
12 citing papers in PubMed, 2 syntheses or guidelines pooled it.
- Insomnia-A Systematic Review and Comparison of Medical Resident's Average Off-Call Sleep Times.International journal of environmental research and public health · 2023Pooled it
- Pooled it
- A Scoping Review of Physical Activity Interventions for Physician Wellness.American journal of lifestyle medicine · 2025Review
- Unintended consequences of a night float system in Paediatric Residency.Paediatrics & child health · 2025Article
- A national survey of on-call responsibilities and night float systems at neurological surgery residency programs.Surgical neurology international · 2025Article
- Sleep, Well-Being, and Cognition in Medical Interns on a Float or Overnight Call Schedule.JAMA network open · 2024Observational
- Resident Sleep During Traditional Home Call Compared to Night Float.Journal of academic ophthalmology (2017) · 2023Article
- Current status and problems of orthopaedic residents in Thailand and Myanmar.MedEdPublish (2016) · 2022Article
- Objective Assessment of Sleep Patterns among Night-Shift Workers: A Scoping Review.International journal of environmental research and public health · 2021Article
- Pediatric resident's perception of night float system compared to 24 hours system, a prospective study.BMC medical education · 2021Article
- Nationwide survey comparing residents' perceptions of overnight duty systems in Singapore: night float versus full overnight call.Singapore medical journal · 2020Article
- Winds of change in medical education in Singapore: what does the future hold?Singapore medical journal · 2018Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
introductionAs the traditional overnight call system was shown to contribute to fatigue, Singapore implemented a shift system in 2014. We aimed to compare activity levels, sleep (using a wrist actigraph), fatigue and professional quality of life between residents working on night float and those on overnight calls.
methodsAll Postgraduate Year 1 (PGY1) residents at our institution were invited to participate. Participants were required to wear a wrist actigraph for four months and complete two validated surveys (Epworth Sleepiness Scale [ESS] and Professional Quality of Life [ProQOL] scale) once each at the start and end of the study.
results49 residents were recruited. Night float and on-call residents showed a comparable median (range) number of steps (10,061 [1,195-15,923] vs. 10,649 [308-21,910]; p = 0.429), amount of sleep logged (361 [149-630] minutes vs. 380 [175-484] minutes; p = 0.369) and time taken to fall asleep (6 [0-14] minutes vs. 6 [range 0-45] minutes; p = 0.726), respectively. Night float residents had less efficient sleep, with 90.5% having sleep efficiency of over 85% compared to 100% of on-call residents (p = 0.127). More night float residents reported ESS scores > 10 (73.1% vs. 38.5%) and higher burnout scores on ProQOL scale (41.4% vs. 21.4%) at the start of the study. However, this was similar to the end of the study and not statistically significant.
conclusionPhysical activity and amount of sleep were not significantly different between night float and on-call residents. Residents on night float reported comparatively more fatigue and burnout.
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