Evidence map›Paper›PMID 40665465›Full record

Trial reportJournal of physiological anthropology2025

Effects of taking a nap or break immediately after night shift on nurses' fatigue recovery and sleep episodes: a quasi-experimental study.

Issei Konya, Inaho Shishido, Kazuhiro Watanabe, Masayuki Ikebuchi, Toshiyasu Tanaka, Hisao Kataoka, Rika Yano

Abstract readRandomized Controlled Trial
PubMed Full text at PMC Publisher
In one paragraph

Trial report in Journal of physiological anthropology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
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

2 citing papers in PubMed.

  1. Observational
  2. Article
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

7 authors.

Issei KonyaDivision of Nursing, Hokkaido University Hospital, Kita 14, Nishi 5, Kita-ku, Sapporo, 060-8648, Japan.ORCID http://orcid.org/0000-0002-7274-5955
Inaho ShishidoFaculty of Health Sciences, Hokkaido University, Kita 12, Nishi 5, Kita-ku, Sapporo, 060-0812, Japan.ORCID http://orcid.org/0000-0002-8865-111X
Kazuhiro WatanabeGraduate School of Health Sciences, Hokkaido University, Kita 12, Nishi 5, Kita-ku, Sapporo, 060-0812, Japan.ORCID http://orcid.org/0000-0002-4069-0785
Masayuki IkebuchiLighting Development Center, Electric Works Company, Panasonic Corporation, 1048 Kadoma, Kadoma City, Osaka, 571-8686, Japan.
Toshiyasu TanakaLighting Development Center, Electric Works Company, Panasonic Corporation, 1048 Kadoma, Kadoma City, Osaka, 571-8686, Japan.
Hisao KataokaLighting Development Center, Electric Works Company, Panasonic Corporation, 1048 Kadoma, Kadoma City, Osaka, 571-8686, Japan.
Rika YanoFaculty of Health Sciences, Hokkaido University, Kita 12, Nishi 5, Kita-ku, Sapporo, 060-0812, Japan. r-yano@med.hokudai.ac.jp.ORCID http://orcid.org/0000-0002-5243-8763

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundExcessive fatigue, sleep deprivation, and poor intershift recovery after night shifts are associated with an increased risk of traffic accidents and maladaptive chronic fatigue. However, little is known about whether taking a nap or break immediately after a night shift improves fatigue recovery and sleep among nurses. This study aimed to examine the effects of taking a 30-min nap or break immediately after a 16-h night shift on fatigue recovery and sleep episodes among nurses.

methodsA quasi-experimental crossover study was conducted with 62 nurses who worked 16-h night shifts. Nurses were randomly assigned to two condition sequences (AB or BA): (A) intervention (the nurses took a 30-min nap or break in a nap environment control system after a night shift) and (B) control (the nurses went home as usual after a night shift). Fatigue was measured immediately after the night shift, after taking a nap or break, and after getting up from nighttime sleep on the day after the night shift. Sleep episodes were assessed using a wearable device. Outcomes were compared between the two conditions.

resultsIn the intervention condition, fatigue immediately after the night shift was significantly reduced by taking a nap or break, with a large effect size. Recovery from "local pain or dullness," one of the symptoms of work-related fatigue, was significantly higher in the intervention than control condition. Compared to the control condition, the intervention condition significantly delayed the timing of the first sleep episode, whereas no significant differences were observed in the main sleep parameters.

conclusionsTaking a nap or break immediately after the night shift could be a countermeasure to address fatigue/sleep-related problems among nurses. For nursing managers, encouraging nurses to take a nap or break immediately after the night shift could be a viable option in comprehensive fatigue risk management. Therefore, appropriate napping environments should be installed in clinical settings.

trial registrationUMIN000038444 (date of registration: 30 Oct 2019).

Indexed as

FatigueNursesShift Work ScheduleSleepWork Schedule ToleranceAdultCross-Over StudiesFemaleHumansMaleMiddle AgedYoung AdultFatigueNight shiftNursesQuasi-experimental studiesRecoveryShift workSleep

Identifiers

PMID40665465
PMCPMC12261775

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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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.