Evidence map›Paper›PMID 42902426›Full record

ArticleBMC psychology2026

Relationship between objective sleep efficiency and psychological distress in middle-aged and older Japanese: Results by work in the Shika study.

Kuniko Sato, Hiromasa Tsujiguchi, Sakae Miyagi, Emi Morita, Fumihiko Suzuki, Akinori Hara, Keita Suzuki, Takayuki Kannon, Masaharu Nakamura, Chie Takazawa and 12 more

Abstract read
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In one paragraph

Article in BMC psychology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
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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

0 citing papers in PubMed.

No citing paper in PubMed yet.

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

22 authors.

Kuniko SatoDepartment of Public Health, Graduate School of Advanced Preventive Medical Sciences, Kanazawa University, 13-1 Takaramachi, Kanazawa, 920-8640, Ishikawa, Japan.
Hiromasa TsujiguchiDepartment of Public Health, Graduate School of Advanced Preventive Medical Sciences, Kanazawa University, 13-1 Takaramachi, Kanazawa, 920-8640, Ishikawa, Japan. t-hiromasa@med.kanazawa-u.ac.jp.
Sakae MiyagiInnovative Clinical Research Center, Kanazawa University, 13-1 Takaramachi, Kanazawa, 920-8641, Ishikawa, Japan.
Emi MoritaInternational Institute for Integrative Sleep Medicine (WPI-IIIS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8577, Ibaraki, Japan.
Fumihiko SuzukiDepartment of Hygiene and Public Health, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, 920-8640, Ishikawa, Japan.
Akinori HaraDepartment of Public Health, Graduate School of Advanced Preventive Medical Sciences, Kanazawa University, 13-1 Takaramachi, Kanazawa, 920-8640, Ishikawa, Japan.
Keita SuzukiDepartment of Hygiene and Public Health, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, 920-8640, Ishikawa, Japan.
Takayuki KannonDepartment of Biomedical Data Science, School of Medicine, Fujita Health University, 1-98 Dengakugakubo Kutsukake-cho, Toyoake city, 470- 1192, Aichi, Japan.
Masaharu NakamuraDepartment of Hygiene and Public Health, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, 920-8640, Ishikawa, Japan.
Chie TakazawaDepartment of Hygiene and Public Health, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, 920-8640, Ishikawa, Japan.
Hirohito TsuboiDepartment of Hygiene and Public Health, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, 920-8640, Ishikawa, Japan.
Sumire MatsumotoInternational Institute for Integrative Sleep Medicine (WPI-IIIS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8577, Ibaraki, Japan.
Asuka IshiharaInternational Institute for Integrative Sleep Medicine (WPI-IIIS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8577, Ibaraki, Japan.
Daisuke HoriInstitute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8575, Ibaraki, Japan.
Shotaro DokiInstitute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8575, Ibaraki, Japan.
Shin-Ichiro SasaharaInstitute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8575, Ibaraki, Japan.
Makoto SatohInternational Institute for Integrative Sleep Medicine (WPI-IIIS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8577, Ibaraki, Japan.
Ichiyo MatsuzakiInternational Institute for Integrative Sleep Medicine (WPI-IIIS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8577, Ibaraki, Japan.
Masashi YanagisawaInternational Institute for Integrative Sleep Medicine (WPI-IIIS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305-8577, Ibaraki, Japan.
Toshiharu IkagaSchool of Science for Open and Environmental Systems, Graduate School of Science and Technology, Keio University, Hiyoshi 3 14 1, Kohoku, Yokohama, 223-8522, Japan.
Atsushi TajimaDepartment of Bioinformatics and Genomics, Graduate School of Advanced Preventive Medical Sciences, Kanazawa University, 13-1 Takaramachi, Kanazawa, 920-8640, Ishikawa, Japan.
Hiroyuki NakamuraDepartment of Public Health, Graduate School of Advanced Preventive Medical Sciences, Kanazawa University, 13-1 Takaramachi, Kanazawa, 920-8640, Ishikawa, Japan.

Funding

AMED JP21zf0127005Japan Society for the Promotion of Science 16H03245Japan Society for the Promotion of Science 17H06151Japan Society for the Promotion of Science 18K11065Japan Society for the Promotion of Science 19H03882Japan Society for the Promotion of Science 24K2280024
6 · The paper itself

Abstract

backgroundSleep quality and work, as factors related to psychological distress, have not yet been elucidated. Additionally, few studies have examined the association between sleep efficiency and psychological distress, which may affect psychological distress in middle-aged and older adults according to their work status. This study aimed to examine and clarify the relationship between sleep efficiency and psychological distress in middle-aged and older Japanese stratified by work and sex.

methodsA cross-sectional study was performed among community dwellers aged 40-90 years living in Shika-machi, Ishikawa, Japan, between January 2018 and April 2020. Psychological distress was assessed utilizing the Kessler 6 scale (K6), a psychological distress scale. Sleep efficiency was measured using actigraphy (MTI-220, ACOS Co., Ltd., Nagano, Japan) that includes the sleep index, and analyses were stratified by work status and sex. A multiple logistic regression analysis was conducted setting the high K6 group as an objective variable.

resultsA total of 360 middle-aged and older adults (women = 54.4%; mean age = 63.09 ± 10.48 years) were included in this study. Psychological distress, adjusted for confounders, was associated with low sleep efficiency (β = -0.060, p = 0.013) only among working women. We found no evidence of a relationship between other indicators of psychological distress in men with or without work and women without work.

conclusionsThese results reveal a relationship between psychological distress and sleep efficiency among middle-aged and older working women, suggesting that work and poor sleep efficiency may be associated with greater psychological distress. Future studies should examine the relationship between psychological distress and sleep efficiency in women middle-aged and older using longitudinal studies that consider work-related effects.

Indexed as

EmploymentPsychological DistressSleepSleep QualityStress, PsychologicalActigraphyAdultAgedAged, 80 and overCross-Sectional StudiesEast Asian PeopleFemaleHumansJapanMaleMiddle AgedCross-sectional studyJapanPsychological distressSexSleep efficiencyWork

Identifiers

PMID42902426
PMCPMC13685070

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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.