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Short daytime napping reduces the risk of cognitive decline in community-dwelling older adults: a 5-year longitudinal study
BACKGROUND: Beneficial 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. METHODS: Study partici...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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BioMed Central
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8401113/ https://www.ncbi.nlm.nih.gov/pubmed/34454431 http://dx.doi.org/10.1186/s12877-021-02418-0 |
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author | Kitamura, Kaori Watanabe, Yumi Nakamura, Kazutoshi Takano, Chikako Hayashi, Naomi Sato, Hisami Someya, Toshiyuki |
author_facet | Kitamura, Kaori Watanabe, Yumi Nakamura, Kazutoshi Takano, Chikako Hayashi, Naomi Sato, Hisami Someya, Toshiyuki |
author_sort | Kitamura, Kaori |
collection | PubMed |
description | BACKGROUND: Beneficial 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. METHODS: Study 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. RESULTS: Mean 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). CONCLUSION: Short 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. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12877-021-02418-0. |
format | Online Article Text |
id | pubmed-8401113 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-84011132021-08-30 Short daytime napping reduces the risk of cognitive decline in community-dwelling older adults: a 5-year longitudinal study Kitamura, Kaori Watanabe, Yumi Nakamura, Kazutoshi Takano, Chikako Hayashi, Naomi Sato, Hisami Someya, Toshiyuki BMC Geriatr Research Article BACKGROUND: Beneficial 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. METHODS: Study 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. RESULTS: Mean 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). CONCLUSION: Short 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. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12877-021-02418-0. BioMed Central 2021-08-28 /pmc/articles/PMC8401113/ /pubmed/34454431 http://dx.doi.org/10.1186/s12877-021-02418-0 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/ (https://creativecommons.org/publicdomain/zero/1.0/) ) applies to the data made available in this article, unless otherwise stated in a credit line to the data. |
spellingShingle | Research Article Kitamura, Kaori Watanabe, Yumi Nakamura, Kazutoshi Takano, Chikako Hayashi, Naomi Sato, Hisami Someya, Toshiyuki Short daytime napping reduces the risk of cognitive decline in community-dwelling older adults: a 5-year longitudinal study |
title | Short daytime napping reduces the risk of cognitive decline in community-dwelling older adults: a 5-year longitudinal study |
title_full | Short daytime napping reduces the risk of cognitive decline in community-dwelling older adults: a 5-year longitudinal study |
title_fullStr | Short daytime napping reduces the risk of cognitive decline in community-dwelling older adults: a 5-year longitudinal study |
title_full_unstemmed | Short daytime napping reduces the risk of cognitive decline in community-dwelling older adults: a 5-year longitudinal study |
title_short | Short daytime napping reduces the risk of cognitive decline in community-dwelling older adults: a 5-year longitudinal study |
title_sort | short daytime napping reduces the risk of cognitive decline in community-dwelling older adults: a 5-year longitudinal study |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8401113/ https://www.ncbi.nlm.nih.gov/pubmed/34454431 http://dx.doi.org/10.1186/s12877-021-02418-0 |
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