1
|
Cavaillès C, Letellier N, Berr C, Samieri C, Empana JP, Tzourio C, Dartigues JF, Benmarhnia T, Dauvilliers Y, Jaussent I. The role of cardiovascular health and vascular events in the relationship between excessive daytime sleepiness and dementia risk. J Sleep Res 2024; 33:e14053. [PMID: 37822116 DOI: 10.1111/jsr.14053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 09/08/2023] [Accepted: 09/12/2023] [Indexed: 10/13/2023]
Abstract
Many studies suggest a relationship between excessive daytime sleepiness (EDS) and dementia incidence, but the underlying mechanisms remain uncertain. The study aimed to investigate the role of cardiovascular burden in the relationship between EDS and dementia incidence over a 12-year follow-up in community-dwelling older adults. We performed analyses on 6171 subjects (aged ≥65 years) free of dementia and vascular disease at baseline. Participants self-reported EDS at baseline and an expert committee validated both prevalent and incident dementia. We defined cardiovascular burden by a low Cardiovascular Health score, constructed using the American Heart Association metrics, and incident vascular events. To explore the potential role of the cardiovascular burden in the relationship between EDS and dementia, we conducted mediation analyses with inverse odds ratio-weighted estimation, using multivariable-adjusted proportional hazard Cox and logistic regression models. Subjects with EDS had a higher risk of all-cause dementia (hazard ratio [HR] 1.39, 95% confidence interval [CI] 1.13-1.69) and dementia with vascular component (DVC) (HR 2.14, 95% CI 1.30-3.51), but not Alzheimer's disease (HR 1.18, 95% CI 0.93-1.51). Cardiovascular burden explained 5% (95% CI 4.1-5.2) and 11% (95% CI 9.7-11.3) of the relationship between EDS and all-cause dementia and DVC, respectively. These findings confirm that EDS may be implicated in the development of dementia and indicate a weaker than expected role of cardiovascular burden in the relationship between EDS and DVC.
Collapse
Affiliation(s)
- Clémence Cavaillès
- Institute for Neurosciences of Montpellier INM, Univ Montpellier, INSERM, Montpellier, France
| | - Noémie Letellier
- Herbert Wertheim School of Public Health and Human Longevity Science & Scripps Institution of Oceanography, UC San Diego, La Jolla, California, USA
| | - Claudine Berr
- Institute for Neurosciences of Montpellier INM, Univ Montpellier, INSERM, Montpellier, France
| | - Cecilia Samieri
- University of Bordeaux, INSERM, Bordeaux Population Health Research Center, Bordeaux, France
| | - Jean-Philippe Empana
- Paris Descartes University, Faculty of Medicine, Paris, France; INSERM, UMR-S970, Paris Cardiovascular Research Center, Department of Epidemiology, Paris, France
| | - Christophe Tzourio
- University of Bordeaux, INSERM, Bordeaux Population Health Research Center, Bordeaux, France
| | - Jean-François Dartigues
- University of Bordeaux, INSERM, Bordeaux Population Health Research Center, Bordeaux, France
| | - Tarik Benmarhnia
- Herbert Wertheim School of Public Health and Human Longevity Science & Scripps Institution of Oceanography, UC San Diego, La Jolla, California, USA
| | - Yves Dauvilliers
- Institute for Neurosciences of Montpellier INM, Univ Montpellier, INSERM, Montpellier, France
- National Reference Centre for Orphan Diseases, Narcolepsy- Rare hypersomnias, Sleep Unit, Department of Neurology, CHU Montpellier, Montpellier, France
| | - Isabelle Jaussent
- Institute for Neurosciences of Montpellier INM, Univ Montpellier, INSERM, Montpellier, France
| |
Collapse
|
2
|
Wang S, Zheng X, Huang J, Liu J, Li C, Shang H. Sleep characteristics and risk of Alzheimer's disease: a systematic review and meta-analysis of longitudinal studies. J Neurol 2024:10.1007/s00415-024-12380-7. [PMID: 38656621 DOI: 10.1007/s00415-024-12380-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 04/08/2024] [Accepted: 04/09/2024] [Indexed: 04/26/2024]
Abstract
BACKGROUND Alzheimer's disease (AD) is on the rise in our aging society, making it crucial to identify additional risk factors to mitigate its increasing incidence. This systematic review and meta-analysis aimed to provide updated evidence regarding the association between sleep and AD. METHODS We conducted a comprehensive search of MEDLINE, EMBASE, and Web of Science databases from inception to July 2023 to identify longitudinal studies. Adjusted relative risks were pooled for each sleep characteristic, and a dose-response analysis was performed specifically for sleep duration. RESULTS A total of 15,278 records were initially retrieved, and after screening, 35 records were ultimately included in the final analysis. The results showed that insomnia (RR, 1.43; 95%CI, 1.17-1.74), sleep-disordered breathing (RR, 1.22; 95%CI, 1.07-1.39), as well as other sleep problems, including sleep fragmentation and sleep-related movement disorders, were associated with a higher risk of developing AD, while daytime napping or excessive daytime sleepiness (RR, 1.18; 95%CI, 1.00-1.40) only exhibited a trend toward a higher risk of AD development. Furthermore, our analysis revealed a significant association between self-reported sleep problems (RR, 1.34; 95%CI, 1.26-1.42) and the incidence of AD, whereas this association was not observed with sleep problems detected by objective measurements (RR, 1.14; 95%CI, 0.99-1.31). Moreover, both quite short sleep duration (< 4 h) and long duration (> 8 h) were identified as potential risk factors for AD. CONCLUSIONS Our study found the association between various types of sleep problems and an increased risk of AD development. However, these findings should be further validated through additional objective device-based assessments. Additional investigation is required to establish a definitive causal connection between sleep problems and AD.
Collapse
Affiliation(s)
- Shichan Wang
- Department of Neurology, Laboratory of Neurodegenerative Disorders, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, No.37, Guoxue Lane, Chengdu, 610041, China
| | - Xiaoting Zheng
- Department of Neurology, Laboratory of Neurodegenerative Disorders, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, No.37, Guoxue Lane, Chengdu, 610041, China
| | - Jingxuan Huang
- Department of Neurology, Laboratory of Neurodegenerative Disorders, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, No.37, Guoxue Lane, Chengdu, 610041, China
| | - Jiyong Liu
- Department of Neurology, Laboratory of Neurodegenerative Disorders, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, No.37, Guoxue Lane, Chengdu, 610041, China
| | - Chunyu Li
- Department of Neurology, Laboratory of Neurodegenerative Disorders, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, No.37, Guoxue Lane, Chengdu, 610041, China.
| | - Huifang Shang
- Department of Neurology, Laboratory of Neurodegenerative Disorders, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, No.37, Guoxue Lane, Chengdu, 610041, China.
| |
Collapse
|
3
|
Xiao X, Rui Y, Jin Y, Chen M. Relationship of Sleep Disorder with Neurodegenerative and Psychiatric Diseases: An Updated Review. Neurochem Res 2024; 49:568-582. [PMID: 38108952 DOI: 10.1007/s11064-023-04086-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 12/08/2023] [Accepted: 12/09/2023] [Indexed: 12/19/2023]
Abstract
Sleep disorders affect many people worldwide and can accompany neurodegenerative and psychiatric diseases. Sleep may be altered before the clinical manifestations of some of these diseases appear. Moreover, some sleep disorders affect the physiological organization and function of the brain by influencing gene expression, accelerating the accumulation of abnormal proteins, interfering with the clearance of abnormal proteins, or altering the levels of related hormones and neurotransmitters, which can cause or may be associated with the development of neurodegenerative and psychiatric diseases. However, the detailed mechanisms of these effects are unclear. This review mainly focuses on the relationship between and mechanisms of action of sleep in Alzheimer's disease, depression, and anxiety, as well as the relationships between sleep and Parkinson's disease, Huntington's disease, and amyotrophic lateral sclerosis. This summary of current research hotspots may provide researchers with better clues and ideas to develop treatment solutions for neurodegenerative and psychiatric diseases associated with sleep disorders.
Collapse
Affiliation(s)
- Xiao Xiao
- School of Mental Health and Psychological Sciences, Anhui Medical University, Hefei, Anhui, China
- Department of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui, China
| | - Yimin Rui
- School of Mental Health and Psychological Sciences, Anhui Medical University, Hefei, Anhui, China
- Department of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui, China
| | - Yu Jin
- Department of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui, China
| | - Ming Chen
- Department of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui, China.
| |
Collapse
|
4
|
Lam A, Kong S, Naismith SL. Recent advances in understanding of sleep disorders and disturbances for dementia risk and prevention. Curr Opin Psychiatry 2024; 37:94-100. [PMID: 38226546 DOI: 10.1097/yco.0000000000000921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/17/2024]
Abstract
PURPOSE OF REVIEW To synthesise the recent work examining the relationship between sleep disturbances and dementia, emphasising studies involving individuals with mild cognitive impairment (MCI) or Alzheimer's disease (AD) and/or those investigating AD biomarkers. Additionally, we provide an update on recent interventions targeting sleep-related issues in older adults with MCI or AD. RECENT FINDINGS Various studies have examined obstructive sleep apnoea, sleep duration, and circadian alterations in relation to Alzheimer's pathology and dementia risk, with an emerging body of evidence suggesting that cardiovascular disease, hypertension, glymphatic function, and inflammation might serve as plausible pathophysiological mechanisms contributing to dementia during critical brain periods. Conversely, recent studies investigating insomnia have produced disparate results. Regarding intervention studies, the scarcity of prospective randomised control trials poses a challenge in establishing the benefits of addressing sleep disorders and disturbances. SUMMARY Recent work examining the pathophysiological links between sleep and dementia is strongest for obstructive sleep apnoea and sleep duration, while findings in insomnia studies exhibit inconsistency, possibly due to varied associations with dementia among different insomnia subtypes. It is apparent that more longitudinal studies examining the underlying pathophysiological mechanisms are necessary, alongside more rigorous clinical trials. Although some trials are underway in this field, there is still scarcity in trials examining interventions for circadian disturbances.
Collapse
Affiliation(s)
- Aaron Lam
- Healthy Brain Ageing Program, Brain and Mind Centre
- School of Psychology, Faculty of Science
- Charles Perkins Centre, The University of Sydney, Camperdown
- The Woolcock Institute of Medical Research, Sydney, NSW, Australia
| | - Shawn Kong
- Healthy Brain Ageing Program, Brain and Mind Centre
- School of Psychology, Faculty of Science
- Charles Perkins Centre, The University of Sydney, Camperdown
| | - Sharon L Naismith
- Healthy Brain Ageing Program, Brain and Mind Centre
- School of Psychology, Faculty of Science
- Charles Perkins Centre, The University of Sydney, Camperdown
| |
Collapse
|
5
|
Catikkas NM, Tunc M, Soysal P. The prevalence of excessive daytime sleepiness and associated factors in older diabetic patients. Aging Clin Exp Res 2023; 35:3205-3214. [PMID: 38064108 DOI: 10.1007/s40520-023-02602-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 10/20/2023] [Indexed: 12/18/2023]
Abstract
OBJECTIVES Sleep disorders are a frequent health problem in older patients with diabetes mellitus (DM). There has been no study investigating the factors associated with excessive daytime sleepiness (EDS) in older diabetic patients. We aimed to investigate the prevalence and associated factors of EDS. METHODS We performed a retrospective cross-sectional study in older diabetic patients. The Epworth Sleepiness Scale score of ≥ 11 points indicated EDS. All patients underwent comprehensive geriatric assessment including demographic characteristics, blood pressures, comorbid diseases, cognitive and nutritional states, basic and instrumental daily living activity indexes, lower urinary tract symptoms, and laboratory values. RESULTS Of 227 patients, 73.1% were females, with a mean age of 78.8 ± 6.5. The prevalence of EDS was 19.8%. Patients with EDS were mostly males with dementia and used significantly more medication with more anticholinergic drug burden, falls, urge incontinence, and nocturia (p < 0.05). They had higher SARC-F and lower Barthel index, Lawton-Brodie, Tinetti, MMSE scores, and high-density lipoprotein than the patients without EDS (p < 0.05). After adjusting for age, sex, and dementia, all parameters that were significant in univariate analysis remained associated with EDS, except for falls, and MMSE scores. CONCLUSION The EDS was found in one in five older diabetic patients. There was a significant relationship between EDS and drug use, anticholinergic drug burden, impaired excretory functions, sarcopenia, decreased functional capacity, falls, gait-balance disorder, and cognitive dysfunction. The recognization of EDS and the implementation of interventions may be helpful in the management of geriatric syndromes.
Collapse
Affiliation(s)
- Nezahat Muge Catikkas
- Hamidiye Faculty of Medicine, Sancaktepe Prof. Dr. Ilhan Varank Training and, Research Hospital, Department of Internal Medicine, Division of Geriatrics, University of Health Sciences Istanbul, 34785, Sancaktepe, Istanbul, Turkey
| | - Muhammed Tunc
- Faculty of Medicine, Department of Internal Medicine, Bezmialem Vakif University, 34093, Fatih, Istanbul, Turkey
| | - Pinar Soysal
- Faculty of Medicine, Department of Geriatric Medicine, Bezmialem Vakif University, 34093, Fatih, Istanbul, Turkey.
| |
Collapse
|
6
|
Wong R, Lovier MA. Sleep Disturbances and Dementia Risk in Older Adults: Findings From 10 Years of National U.S. Prospective Data. Am J Prev Med 2023; 64:781-787. [PMID: 36707315 DOI: 10.1016/j.amepre.2023.01.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 01/05/2023] [Accepted: 01/06/2023] [Indexed: 01/28/2023]
Abstract
INTRODUCTION Previous research has identified a link between sleep disturbances and cognitive impairment; however, no study has examined this relationship using a national United States sample. This study examines how multiple longitudinal measures of sleep disturbances (sleep-initiation insomnia, sleep-maintenance insomnia, sleep-medication usage) are associated with dementia risk. METHODS Ten annual waves (2011-2020) of prospective cohort data from a nationally representative U.S. sample of adults aged ≥65 years were analyzed from the National Health and Aging Trends Study. Sleep disturbances were converted into a longitudinal score and measured as sleep-initiation insomnia (trouble falling asleep in 30 minutes), sleep-maintenance insomnia (trouble falling asleep after waking up early), and sleep-medication usage (taking medication to help sleep). Cox regression models analyzed time to dementia diagnosis for a sample of 6,284 respondents. RESULTS In the unadjusted model, sleep-initiation insomnia was significantly associated with a 51% increased dementia risk (hazard ratio=1.51, 95% CI=1.19, 1.90). Adjusted for sociodemographics, sleep-medication usage was significantly associated with a 30% increased dementia risk (adjusted hazard ratio=1.30, 95% CI=1.08-1.56). Adjusted for sociodemographics and health, sleep-maintenance insomnia was significantly associated with a 40% decreased dementia risk (adjusted hazard ratio=0.60, 95% CI=0.46, 0.77). CONCLUSIONS These findings suggest that sleep-initiation insomnia and sleep-medication usage may elevate dementia risk. On the basis of the current evidence, sleep disturbances should be considered when assessing the risk profile for dementia. Future research is needed to examine other sleep disturbance measures and to explore the mechanisms for decreased dementia risk among older adults with sleep-maintenance insomnia.
Collapse
Affiliation(s)
- Roger Wong
- Department of Public Health and Preventive Medicine, Norton College of Medicine, SUNY Upstate Medical University, Syracuse, New York.
| | - Margaret Anne Lovier
- Department of Public Health and Preventive Medicine, Norton College of Medicine, SUNY Upstate Medical University, Syracuse, New York
| |
Collapse
|
7
|
Shao H, Li N, Chen M, Zhang J, Chen H, Zhao M, Yang J, Xia J. A voxel-based morphometry investigation of brain structure variations in late-life depression with insomnia. Front Psychiatry 2023; 14:1201256. [PMID: 37275990 PMCID: PMC10232904 DOI: 10.3389/fpsyt.2023.1201256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Accepted: 04/28/2023] [Indexed: 06/07/2023] Open
Abstract
Background Late-life depression (LLD) is linked to various medical conditions and influenced by aging-related processes. Sleep disturbances and insomnia symptoms may be early indicators or risk factors for depression. Neuroimaging studies have attempted to understand the neural mechanisms underlying LLD, focusing on different brain networks. This study aims to further delineate discriminative brain structural profiles for LLD with insomnia using MRI. Methods We analyzed 24 cases in the LLD with insomnia group, 26 cases in the LLD group, and 26 in the healthy control (HC) group. Patients were evaluated using the Hamilton Depression Rating Scale (HAMD-17), Hamilton Anxiety Rating Scale (HAMA), Mini-Mental State Examination (MMSE), and Pittsburgh Sleep Quality Index (PSQI). Structural MRI data were gathered and analyzed using voxel-based morphometry (VBM) to identify differences in gray matter volume (GMV) among the groups. Correlation analyses were conducted to explore the relationships between GMV and clinical characteristics. Results Significant difference in sex distribution was observed across the groups (p = 0.029). However, no significant differences were detected in age and MMSE scores among the groups. LLD with insomnia group exhibited significantly higher HAMA (p = 0.041) and PSQI scores (p < 0.05) compared to the LLD group. ANOVA identified significant difference in GMV of anterior lobe of cerebellum (peak MNI coordinate: x = 52, y = -40, z = -30) among HC, LLD, and LLD with insomnia. Post-hoc two-sample t-tests revealed that the significant difference in GMV was only found between the LLD group and the HC group (p < 0.05). The mean GMV in the cerebellum was positively correlated with HAMA scale in LLD patients (r = 0.47, p < 0.05). Conclusion There is significant difference in GMV in the LLD group, the association between late-life depression and insomnia may be linked to anxiety. This study provides insights into the discriminative brain structural profiles of LLD and LLD with insomnia, advancing the understanding of the underlying neural mechanisms and potential targets for intervention.
Collapse
Affiliation(s)
- Heng Shao
- Department of Psychiatry, First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Na Li
- Department of Psychiatry, First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Meiling Chen
- Department of Clinical Psychology, The First People’s Hospital of Yunnan Province, Kunming, China
- The Affiliated Hospital of Kunming University of Science and Technology, Kunming, China
| | - Jie Zhang
- The Affiliated Hospital of Kunming University of Science and Technology, Kunming, China
- Department of MRI, The First People’s Hospital of Yunnan Province, Kunming, China
| | - Hui Chen
- Department of Clinical Psychology, The First People’s Hospital of Yunnan Province, Kunming, China
- The Affiliated Hospital of Kunming University of Science and Technology, Kunming, China
| | - Minjun Zhao
- The Affiliated Hospital of Kunming University of Science and Technology, Kunming, China
- Department of Geriatrics, The First People’s Hospital of Yunnan Province, Kunming, China
| | - Jingjing Yang
- The Affiliated Hospital of Kunming University of Science and Technology, Kunming, China
- Department of Geriatrics, The First People’s Hospital of Yunnan Province, Kunming, China
| | - Jian Xia
- School of Medicine, Kunming University of Science and Technology, Kunming, China
| |
Collapse
|
8
|
Selbaek-Tungevåg S, Selbaek G, Strand BH, Myrstad C, Livingston G, Lydersen S, Bergh S, Ernstsen L. Insomnia and risk of dementia in a large population-based study with 11-year follow-up: The HUNT study. J Sleep Res 2023:e13820. [PMID: 36689779 DOI: 10.1111/jsr.13820] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 12/09/2022] [Accepted: 12/18/2022] [Indexed: 01/25/2023]
Abstract
Despite evidence suggesting that insomnia is associated with the risk of dementia and cognitive dysfunction, studies have shown mixed results. Dementia has a long prodromal phase, and studies with long follow-up are required to avoid reverse causality. In our 11-year follow-up study, we assessed whether probable insomnia disorder (PID) based on diagnostic criteria, and insomnia symptoms were associated with risk of all-cause dementia, Alzheimer's disease (AD) and cognition, measured with the Montreal Cognitive Assessment scale. We also examined if Apolipoprotein E genotype modified any associations with dementia through interaction. We analysed data from 7492 participants in the Norwegian Trøndelag Health Study. PID was not associated with all-cause dementia (odds ratio = 1.03, 95% confidence interval = 0.74-1.43), AD (odds ratio = 1.07, 95% confidence interval = 0.71-1.60) or Montreal Cognitive Assessment score (regression coefficient = 0.37, 95% confidence interval = -0.06 to 0.80). The insomnia symptom "difficulties maintaining sleep" was associated with a lower risk of all-cause dementia (odds ratio = 0.81, 95% confidence interval = 0.67-0.98), AD (odds ratio = 0.73, 95% confidence interval = 0.57-0.93), and better Montreal Cognitive Assessment score, mean 0.40 units (95% confidence interval = 0.15-0.64). No interaction with Apolipoprotein E genotype was found. PID and insomnia symptoms did not increase the risk of dementia in our study. More research with longer follow-up is needed, and future studies should explore if the associations to dementia risk vary across insomnia subtypes.
Collapse
Affiliation(s)
- Selma Selbaek-Tungevåg
- Department of Public Health and Nursing, Norwegian University of Science and Technology, Trondheim, Norway.,Surgical Department, Innlandet Hospital Trust, Lillehammer, Norway
| | - Geir Selbaek
- Norwegian National Centre for Ageing and Health, Vestfold Hospital Trust, Tønsberg, Norway.,Department of Geriatric Medicine, Oslo University Hospital, Oslo, Norway.,Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Bjørn Heine Strand
- Norwegian National Centre for Ageing and Health, Vestfold Hospital Trust, Tønsberg, Norway.,Department of Geriatric Medicine, Oslo University Hospital, Oslo, Norway.,Department for Physical Health and Ageing, Norwegian Institute of Public Health, Oslo, Norway
| | - Christian Myrstad
- Norwegian National Centre for Ageing and Health, Vestfold Hospital Trust, Tønsberg, Norway.,Department of Medicine, Levanger Hospital, Nord-Trøndelag Hospital Trust, Levanger, Norway
| | - Gill Livingston
- Division of Psychiatry, University College London, London, UK.,Camden and Islington NHS Foundation Trust, London, UK
| | - Stian Lydersen
- Regional Centre for Child and Youth Mental Health and Child Welfare, Department of Mental Health, Norwegian University of Science and Technology, Trondheim, Norway
| | - Sverre Bergh
- Norwegian National Centre for Ageing and Health, Vestfold Hospital Trust, Tønsberg, Norway.,Research Centre for Age-Related Functional Decline, Innlandet Hospital Trust, Brumunddal, Norway
| | - Linda Ernstsen
- Department of Public Health and Nursing, Norwegian University of Science and Technology, Trondheim, Norway
| |
Collapse
|
9
|
Teräs T, Rovio S, Pentti J, Head J, Kivimäki M, Stenholm S. Association of sleep with cognitive function during retirement transition: the Whitehall II study. Sleep 2023; 46:6722579. [PMID: 36165428 PMCID: PMC9832514 DOI: 10.1093/sleep/zsac237] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 08/12/2022] [Indexed: 01/14/2023] Open
Abstract
STUDY OBJECTIVES Sleep duration and difficulties have been shown to associate with cognitive function. This study examined how changes in sleep and in cognitive function are associated during retirement transition. METHODS The study population consisted of 2980 Whitehall II study participants, who retired during the follow-up, whose sleep was queried, and cognitive function measured (inductive reasoning and verbal memory) before and after retirement (follow-up 16 years). Using the last information on sleep before and the first after retirement, participants were categorized into constantly without (59%), increasing (13%), decreasing (11%), and constantly with (18%) sleep difficulties; and constantly short (26%), increasing (19%), decreasing (8.5%), and constantly mid-range (47%) sleep duration. Change in cognitive function during retirement transition was examined by sleep change groups using linear regression analyses with generalized estimating equations. RESULTS More pronounced decline in inductive reasoning during retirement transition was observed among participants with increasing sleep difficulties (-1.96, 95% CI -2.52 to -1.41) compared to those constantly without sleep difficulties (-1.25, 95% CI -1.52 to -0.98) and constantly with sleep difficulties (-1.26, 95% CI -1.75 to -0.92). Decreasing sleep difficulties (-0.64, 95% CI -0.86 to -0.43) were associated with a more pronounced decline in verbal memory when compared to constantly without sleep difficulties (-0.42, 95% CI -0.52 to -0.32) in post-retirement period. No statistically significant differences across sleep duration groups in cognitive function were observed. CONCLUSIONS Increasing and decreasing sleep difficulties may be associated with accelerated decline in cognitive function during retirement transition and post-retirement.
Collapse
Affiliation(s)
- Tea Teräs
- Department of Public Health, University of Turku and Turku University Hospital, Turku, Finland.,Centre for Population Health Research, University of Turku and Turku University Hospital, Turku, Finland
| | - Suvi Rovio
- Centre for Population Health Research, University of Turku and Turku University Hospital, Turku, Finland.,Research Center of Applied and Preventive Cardiovascular Medicine, University of Turku, Turku, Finland
| | - Jaana Pentti
- Department of Public Health, University of Turku and Turku University Hospital, Turku, Finland.,Centre for Population Health Research, University of Turku and Turku University Hospital, Turku, Finland.,Clinicum, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Jenny Head
- Department of Epidemiology and Public Health, University College London, London, UK
| | - Mika Kivimäki
- Clinicum, Faculty of Medicine, University of Helsinki, Helsinki, Finland.,Department of Epidemiology and Public Health, University College London, London, UK.,Finnish Institute of Occupational Health, Helsinki, Finland
| | - Sari Stenholm
- Department of Public Health, University of Turku and Turku University Hospital, Turku, Finland.,Centre for Population Health Research, University of Turku and Turku University Hospital, Turku, Finland
| |
Collapse
|