ArticleBMC geriatrics2021
Short daytime napping reduces the risk of cognitive decline in community-dwelling older adults: a 5-year longitudinal study.
Article in BMC geriatrics, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 3 of them syntheses that pooled 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.
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
23 citing papers in PubMed, 3 syntheses or guidelines pooled it, 34 citations in OpenAlex.
- Daytime Napping and Cognitive Health in Older Adults: A Systematic Review.The journals of gerontology. Series A, Biological sciences and medical sciences · 2023Pooled it
- Napping and cognitive decline: a systematic review and meta-analysis of observational studies.BMC geriatrics · 2022Pooled it
- Daytime naps and depression risk: A meta-analysis of observational studies.Frontiers in psychology · 2022Pooled it
- Associations of sleep behaviors with white matter hyperintensity volume in middle-aged to older adults.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2026Article
- Breaking the nap habit: one-year nap restriction mitigates memory decline in older adults.GeroScience · 2026Article
- Association between depressive symptoms and cognitive impairment among older adults in China: a mediation analysis of proactive health.BMC geriatrics · 2025Article
- Daytime napping and nighttime sleep and motoric cognitive risk syndrome among Chinese older adults: a nationwide cohort study.BMC geriatrics · 2025Observational
- Association between sleep duration, depression and cognitive decline trajectories: findings from a prospective cohort study in China.BMC psychiatry · 2025Article
- Alpha rhythm and Alzheimer's disease: Has Hans Berger's dream come true?Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology · 2025Article
- Association between midday napping and long-term trajectories of cognitive function among middle-aged and older Chinese adults.PloS one · 2025Article
- Nap duration and its association with hypertension-diabetes comorbidity in minority populations: evidence from the CMEC study.Frontiers in endocrinology · 2025Article
- The existing state of knowledge about sleep health in community-dwelling older persons - a scoping review.Annals of medicine · 2024Article
- Association between nighttime sleep duration, nap time, and mild cognitive impairment in Chinese older adults: a cross-sectional study.BMC public health · 2024Article
- Association between nocturnal sleep duration and midday napping and the incidence of sarcopenia in middle-aged and older adults: a 4-year longitudinal study.Environmental health and preventive medicine · 2024Article
- Article
- Dementia and the history of disease in older adults in community.BMC public health · 2023Article
- Article
- Sleep-Related Changes Prior to Cognitive Dysfunction.Current neurology and neuroscience reports · 2023Review
- A scoping review of neurodegenerative manifestations in explainable digital phenotyping.NPJ Parkinson's disease · 2023Article
- Association between napping and 24-hour blood pressure variability among university students: A pilot study.Frontiers in pediatrics · 2023Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundBeneficial effects of napping on cognition have been suggested in cross-sectional studies. This study aimed to clarify longitudinal associations between cognitive decline and sleep characteristics, particularly daytime napping, over a 5-year period in older adults.
methodsStudy participants were 389 community-dwelling individuals aged ≥65 years living in Ojiya City, Niigata, Japan. Baseline and follow-up examinations were conducted in 2011-2013 and 2016-2018, respectively. Trained nurses visited and interviewed participants to collect the following information at baseline and follow-up: demographic characteristics, disease history, lifestyle habits including bedtime, sleeping hours, and daytime nap duration, and cognitive function. The assessment of cognitive function was performed using the revised Hasegawa's dementia scale (HDS-R), with cognitive decline defined as a change in the HDS-R of ≤ - 3 over 5 years. Odds ratios (ORs) for cognitive decline were calculated using multiple logistic regression analysis.
resultsMean age of participants was 74.6 years (SD 6.4), and the cumulative incidence of cognitive decline was 106/389 (27.3%). The adjusted OR for 1-29 min daytime napping was significantly lower compared to that for no napping (OR = 0.47, 95%CI: 0.23-0.96). Earlier bedtime was associated with cognitive decline (adjusted P for trend = 0.0480).
conclusionShort daytime napping (< 30 min) reduces the risk of cognitive decline over 5 years for community-dwelling older people. A future study will be necessary to confirm the effect of short napping on the reduction of risk for clinically diagnosed dementia.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
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.