Evidence map›Paper›PMID 33432918›Full record

ArticleJournal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine2021

Sex differences in deterioration of sleep properties associated with aging: a 12-year longitudinal cohort study.

Hyeon Jin Kim, Regina E Y Kim, Soriul Kim, Sol Ah Kim, Song E Kim, Seung Ku Lee, Hyang Woon Lee, Chol Shin

Open access · bronzeAbstract read
In one paragraph

Article in Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
4.0field-weighted citation impact, top 6% 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

19 citing papers in PubMed, 32 citations in OpenAlex.

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  6. Self-Efficacy is Key: Examining the Role of Motivation to Engage in Healthy Lifestyle Behaviors for Dementia Prevention in Midlife.Journal of applied gerontology : the official journal of the Southern Gerontological Society · 2026
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  7. Review
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  12. Sex Differences in the Role of Sleep on Cognition in Older Adults.medRxiv : the preprint server for health sciences · 2024
    Article
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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

8 authors at 3 institutions in 2 countries.

Hyeon Jin KimDepartments of Neurology and Medical Science, College of Medicine, Ewha Womans University and Ewha Medical Research Institute, Seoul, Republic of Korea.
Regina E Y KimInstitute of Human Genomic Study, College of Medicine, Korea University, Ansan, Republic of Korea.
Soriul KimInstitute of Human Genomic Study, College of Medicine, Korea University, Ansan, Republic of Korea.
Sol Ah KimDepartments of Neurology and Medical Science, College of Medicine, Ewha Womans University and Ewha Medical Research Institute, Seoul, Republic of Korea.
Song E KimDepartments of Neurology and Medical Science, College of Medicine, Ewha Womans University and Ewha Medical Research Institute, Seoul, Republic of Korea.
Seung Ku LeeInstitute of Human Genomic Study, College of Medicine, Korea University, Ansan, Republic of Korea.
Hyang Woon LeeDepartments of Neurology and Medical Science, College of Medicine, Ewha Womans University and Ewha Medical Research Institute, Seoul, Republic of Korea.
Chol ShinInstitute of Human Genomic Study, College of Medicine, Korea University, Ansan, Republic of Korea.
Korea University · KREwha Womans University Medical Center · KREwha Womans University · KR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

STUDY

objectivesThe sleep patterns of humans are greatly influenced by age and sex and have various effects on overall health as they change continuously during the lifespan. We investigated age-dependent changes in sleep properties and their relation to sex in middle-aged individuals.

methodsWe analyzed data from 2,640 participants (mean age of 49.8 ± 6.8 years at baseline, 50.6% women) in the Korean Genome and Epidemiology Study, which assessed sleep habits using the Pittsburgh Sleep Quality Index and other clinical characteristics. We analyzed the sleep habit changes that occurred between baseline and a follow-up point (mean interval: 12.00 ± 0.16 years). Associations of age and sex with 9 sleep characteristics were evaluated.

resultsAge was associated with most of the sleep characteristics cross-sectionally and longitudinally (P < .05), except for the time in bed at baseline (P = .455) and change in sleep duration (P = .561). Compared with men, women had higher Pittsburgh Sleep Quality Index scores, shorter time in bed, shorter sleep duration, and longer latency at baseline (P ≤ .001). Longitudinal deterioration in Pittsburgh Sleep Quality Index score, habitual sleep efficiency, duration, and latency was more prominent in women (P < .001). The sex differences in these longitudinal sleep changes were mainly noticeable before age 60 years (P < .05). Worsening of Pittsburgh Sleep Quality Index scores, habitual sleep efficiency, and latency was most evident in perimenopausal women. Men presented with greater advancement of chronotype (P = .006), with the peak sex-related difference occurring when they were in their late 40s (P = .048).

conclusionsAging is associated with substantial deterioration in sleep quantity and quality as well as chronotype advancement, with the degree and timing of these changes differing by sex.

Indexed as

Sex CharacteristicsSleepAdultAgingCohort StudiesFemaleHumansLongitudinal StudiesMaleMiddle Agedagechronotypecohortmenopausesexsleep

Identifiers

PMID33432918
PMCPMC8320492
OpenAlexW3120097303

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.