Evidence map›Paper›PMID 38666299›Full record

ArticleSleep2024

Impact of sleep disturbance in shift workers on hippocampal volume and psychomotor speed.

Yumi Song, Shinhye Kim, Yoonji Joo, Eunji Ha, Youngeun Shim, Hyeonji Lee, Hyeonseok Jeong, InKyoon Lyoo, Sujung Yoon, Suji Lee

Abstract read
PubMed Publisher
In one paragraph

Article in Sleep, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed
3.0field-weighted citation impact, top 9% of its field
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

4 citing papers in PubMed, 6 citations in OpenAlex.

  1. Neurobiophilia.Brain sciences · 2026
    Review
  2. Article
  3. The probioticInternational journal of medical sciences · 2025
    Article
  4. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

10 authors at 3 institutions in 1 country.

Yumi SongEwha Brain Institute, Ewha Womans University, Seoul, South Korea.ORCID 0000-0003-2794-4901
Shinhye KimEwha Brain Institute, Ewha Womans University, Seoul, South Korea.
Yoonji JooEwha Brain Institute, Ewha Womans University, Seoul, South Korea.ORCID 0000-0003-3350-7740
Eunji HaEwha Brain Institute, Ewha Womans University, Seoul, South Korea.
Youngeun ShimEwha Brain Institute, Ewha Womans University, Seoul, South Korea.
Hyeonji LeeEwha Brain Institute, Ewha Womans University, Seoul, South Korea.
Hyeonseok JeongDepartment of Radiology, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea.
InKyoon LyooEwha Brain Institute, Ewha Womans University, Seoul, South Korea.
Sujung YoonEwha Brain Institute, Ewha Womans University, Seoul, South Korea.
Suji LeeCollege of Pharmacy, Dongduk Women's University, Seoul, South Korea.
Ewha Womans University · KRDongduk Women's University · KRThe Catholic University of Korea Incheon St. Mary's Hospital · KR

Funding

National Research Foundation of Korea NRF-2020R1A6A1A03043528
6 · The paper itself

Abstract

STUDY

objectivesShift work interferes with circadian rhythms, affecting sleep quality and cognitive function. Poor sleep quality in shift worker (SW)s can impair psychomotor performance due to fatigue and sleepiness, increasing the risk of errors, accidents, and reduced productivity. Given the potential for atrophic changes in the hippocampus due to sleep disturbances, our study investigates how poor sleep quality correlates with hippocampal structural alterations and impacts psychomotor performance among SWs.

methodsWe recruited 100 SWs, classifying them based on sleep quality into two groups: good sleep-SW group (n = 59) and poor sleep-SW group (n = 41). Sleep quality was assessed using both 7-day actigraphy for sleep efficiency and the Pittsburgh Sleep Quality Index. A control group of 106 non-SWs without sleep problems (non-SW group) was also included for comparison. The outcome measures were psychomotor speed and hippocampal volumes, both total and by subfield.

resultsThe poor sleep-SW group showed significantly smaller hippocampal volumes than both the good sleep-SW group (p < .001) and the non-SW group (p = .003). Longer shift work years correlated with greater reductions in hippocampal volume in this group (r = -0.42, p = .009), unlike in the good sleep-SW group (r = 0.08, p = .541). Furthermore, they demonstrated declines in psychomotor speed relative to the non-SW group (p = .006), which correlated with smaller hippocampal volumes (r = 0.37, p = .020).

conclusionsSWs with poor sleep quality exhibit significant hippocampal volume reductions and psychomotor speed decline, underscoring the importance of early intervention and support for sleep issues in this population.

Indexed as

ActigraphyHippocampusPsychomotor PerformanceAdultFemaleHumansMagnetic Resonance ImagingMaleMiddle AgedProcessing SpeedSleep Disorders, Circadian RhythmSleep Qualityhippocampuspsychomotor speedshift worksleep disturbance

Identifiers

PMID38666299
OpenAlexW4395677842

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.