1
|
Muhammad T, Lee S, Pai M, Mandal B. Association between sleep quality, sleep duration, and physical frailty among adults aged 50 years and older in India. BMC Public Health 2024; 24:3120. [PMID: 39529114 PMCID: PMC11556025 DOI: 10.1186/s12889-024-20606-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Accepted: 11/04/2024] [Indexed: 11/16/2024] Open
Abstract
BACKGROUND Considering the significant growth in India's aging population, it is imperative to identify factors associated with frailty among older Indians. This study examined the association between sleep quality, sleep duration, and physical frailty among older adults in India. Moreover, we examined whether the associations between sleep quality, sleep duration, and physical frailty varied by gender. METHODS In this secondary analysis, we used data from the 2015 wave 2 of the Study on Global Aging and Adult Health (WHO-SAGE) in India, comprising a sample of 6,512 older adults aged 50 years and above. Pre-frailty and frailty were assessed using the modified version of the frailty phenotype developed by Fried and colleagues. Sleep was assessed by self-reported quality and duration. Multinomial and multivariable logistic regression models were used to examine the associations between sleep quality, sleep duration, and physical frailty (including its components), as well as to explore the moderating effect of gender. RESULTS 66.8% of older Indians were pre-frail, while 25.2% were frail. Relative to those with good sleep quality, older adults with poor sleep quality had significantly higher odds of frailty [AOR: 2.79; CI: 1.37-5.66]. Compared to those receiving the recommended age-appropriate 7-8 h of sleep, older adults sleeping ≥ 9 h reported a significantly lower likelihood of both pre-frailty [AOR: 0.73; CI: 0.57-0.93] and frailty [AOR: 0.68; CI: 0.51-0.91]. Analysis of specific components of frailty showed that older adults with long sleep had lower odds of exhaustion [AOR: 0.86; CI: 0.73-1.00] compared to those with age-appropriate sleep duration. Moreover, frailty was more pronounced in older men with poor sleep quality and short sleep duration (< 7 h/night) than in older women with similar sleep patterns. Poor sleep quality was not linked to any of the frailty components in older women; however, in older men, it was associated with exhaustion [AOR: 4.28; CI: 2.28-8.06], weak grip strength [AOR: 2.31; CI: 1.46-3.67], and low physical activity [AOR: 2.81; CI: 1.10-7.21]. CONCLUSION The findings indicate potential associations between sleep quality, sleep quantity, and physical frailty among older Indians. Poor sleep quality was associated with frailty, yet long sleep duration was associated with a lower prevalence of frailty, independent of sleep quality. Moreover, the prevalence of frailty associated with poor sleep quality and shorter sleep duration was more pronounced among older Indian men than women, underscoring the need for targeted interventions to address sleep-related concerns in this demographic.
Collapse
Affiliation(s)
- T Muhammad
- Department of Human Development and Family Studies, Center for Healthy Aging, The Pennsylvania State University, University Park, PA, 16802, USA.
| | - Soomi Lee
- Department of Human Development and Family Studies, The Pennsylvania State University, University Park, State College, PA, 16802, USA
| | - Manacy Pai
- Department of Sociology and Criminology, Kent State University, Kent, OH, 44242, USA
| | - Bittu Mandal
- School of Humanities and Social Sciences, Indian Institute of Technology Indore, Khandwa Road, Simrol, Indore, 453552, India
| |
Collapse
|
2
|
Chen L, Wang J, Geng L, Li Y. Development and validation of a risk prediction model for physical frailty in older adults who are disabled. Geriatr Nurs 2024; 58:26-38. [PMID: 38733746 DOI: 10.1016/j.gerinurse.2024.04.020] [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: 01/05/2024] [Revised: 04/09/2024] [Accepted: 04/18/2024] [Indexed: 05/13/2024]
Abstract
Physical frailty is highly prevalent among the older adults who are disabled. The aim of this study was to explore the risk factors for physical frailty in older adults who are disabled and construct a nomogram prediction model. The data source was the China Health and Retirement Longitudinal Study (CHARLS). The prediction model was validated with a cohort of 1183 older adults who are disabled. The results showed that sleep quality, depression, fatigue, and chronic disease were the best predictive factors. These factors were used to construct the nomogram model, which showed good concordance and accuracy. The prediction model yielded an Area under the curve (AUC) value of 0.760. Calibration curves showed significant agreement between the nomogram model and actual observations. Receiver operating characteristic (ROC) and Decision curve analysis (DCA) showed that the nomogram had good predictive performance. The nomogram is contributed to the screening of specific populations by clinicians.
Collapse
Affiliation(s)
- Lijing Chen
- The Fifth People's Hospital of Zhuhai, Zhuhai, China
| | - Jiaxian Wang
- Zhuhai Campus of Zunyi Medical University, Zhuhai, China
| | - Li Geng
- The Fifth People's Hospital of Zhuhai, Zhuhai, China
| | - Yi Li
- The Fifth People's Hospital of Zhuhai, Zhuhai, China.
| |
Collapse
|
3
|
Canever JB, Zurman G, Vogel F, Sutil DV, Diz JBM, Danielewicz AL, Moreira BDS, Cimarosti HI, de Avelar NCP. Worldwide prevalence of sleep problems in community-dwelling older adults: A systematic review and meta-analysis. Sleep Med 2024; 119:118-134. [PMID: 38669835 DOI: 10.1016/j.sleep.2024.03.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 03/09/2024] [Accepted: 03/23/2024] [Indexed: 04/28/2024]
Abstract
The understanding of the prevalence of sleep problems in older adults can provide a broad and reliable perspective into the occurrence of such issues among older adults. This systematic review and meta-analysis aimed to estimate the worldwide prevalence of sleep problems in community-dwelling older adults. Studies that provide information on the prevalence of sleep problems in community-dwelling older adults (≥60 years) were screened between December 2022 and March 2023. A total of 20,379 studies were identified in database searches, from which 252 were included in this review. These studies covered the last 35 years (from 1988 to 2023) and pooled a sample of 995,544 participants from 36 countries. The most frequent sleep problem worldwide was obstructive sleep apnea (46.0%), followed by poor sleep quality (40.0%), other sleep problems (37.0%), insomnia (29.0%), and excessive daytime sleepiness (19.0%). No significant difference in the prevalence estimates of all sleep problems was observed between the sexes. This systematic review and meta-analysis showed a high prevalence of some sleep problems, mainly obstructive sleep apnea, poor sleep quality, and other sleep problems. Our estimates can be useful for managers and policymakers in planning healthcare strategies for sleep problems aimed at the older population.
Collapse
Affiliation(s)
- Jaquelini Betta Canever
- Laboratory of Aging, Resources and Rheumatology, Department of Health Sciences, Federal University of Santa Catarina, Campus Araranguá, Rod. Governador Jorge Lacerda, Araranguá, Santa Catarina, Urussanguinha, 320188906-072, Brazil; Postgraduate Program in Neuroscience, Center of Biological Sciences, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil.
| | - Gabriela Zurman
- Postgraduate Program in Neuroscience, Center of Biological Sciences, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Felipe Vogel
- Postgraduate Program in Neuroscience, Center of Biological Sciences, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Daiana Vieira Sutil
- Postgraduate Program in Neuroscience, Center of Biological Sciences, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | | | - Ana Lúcia Danielewicz
- Postgraduate Program in Neuroscience, Center of Biological Sciences, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Bruno de Souza Moreira
- Center for Studies in Public Health and Aging, Federal University of Minas Gerais and Oswaldo Cruz Foundation - Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Helena Iturvides Cimarosti
- Laboratory of Aging, Resources and Rheumatology, Department of Health Sciences, Federal University of Santa Catarina, Campus Araranguá, Rod. Governador Jorge Lacerda, Araranguá, Santa Catarina, Urussanguinha, 320188906-072, Brazil
| | - Núbia Carelli Pereira de Avelar
- Postgraduate Program in Neuroscience, Center of Biological Sciences, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil
| |
Collapse
|
4
|
Wang C, Zhang Y, Wang J, Wan L, Li B, Ding H. A study on the falls factors among the older adult with cognitive impairment based on large-sample data. Front Public Health 2024; 12:1376993. [PMID: 38947354 PMCID: PMC11212509 DOI: 10.3389/fpubh.2024.1376993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Accepted: 05/30/2024] [Indexed: 07/02/2024] Open
Abstract
Introduction This study explored the correlative factors of falls among the older adult with cognitive impairment, to provide distinct evidence for preventing falls in the older adult with cognitive impairment compared with the general older adult population. Methods This study was based on a cross-sectional survey, with an older adult population of 124,124 was included. The data was sourced from the Elderly Care Unified Needs Assessment for Long-Term Care Insurance in Shanghai. Binary and multivariable logistic regression analyses were conducted sequentially on the correlative factors of falls. Multivariable logistic regression was performed on variables that were significant, stratified by cognitive function levels. Results The incidence of fall in the past 90 days was 17.67% in this study. Specific variables such as gender (male), advanced age (≥80), residence with a elevator (or lift), mild or moderate disability, quality of sleep (acceptable/poor) were negatively correlated with falls, while higher education level, living alone, residence with indoor steps, unclean and untidy living environment, MCI or dementia, chronic diseases, restricted joints, impaired vision, and the use of diaper were positively correlative factors of falls. Comparing with older adult with normal cognitive functions, older adult with dementia faced a higher risk of falling due to accessibility barrier in the residence. For general older adults, less frequency of going outside and poor social interactions were positively correlated with falls, while for older adult with cognitive impairments, going outside moderately (sometimes) was found positively correlated with falls. Older adults with cognitive impairments have increased fall risks associated with chronic diseases, restricted joints, and the use of diaper. The risk of falling escalated with the greater number of chronic diseases. Discussion For older adult with cognitive impairments, it is advisable to live with others. Additionally, creating an accessible living environment and maintaining the cleanness and tidiness can effectively reduce the risk of falls, particularly for those with MCI or dementia. Optimal outdoor activity plans should be developed separately based on the cognitive function of older adults. Older adult with dementia who have comorbidities should be paid special attention in fall prevention compared to the general older adult population.
Collapse
Affiliation(s)
- Changying Wang
- Shanghai Health Development Research Center, (Shanghai Medical Information Center), Shanghai, China
| | - Yunwei Zhang
- Shanghai Health Development Research Center, (Shanghai Medical Information Center), Shanghai, China
| | - Jin Wang
- Shanghai Health Development Research Center, (Shanghai Medical Information Center), Shanghai, China
| | - Lingshan Wan
- Shanghai Health Development Research Center, (Shanghai Medical Information Center), Shanghai, China
| | - Bo Li
- Minhang Hospital, Fudan University, Shanghai, China
| | - Hansheng Ding
- Shanghai Health Development Research Center, (Shanghai Medical Information Center), Shanghai, China
| |
Collapse
|
5
|
Yuan C, Zhang Y. Modifiable risk factors of cognitive frailty in community-dwelling older adults: A systematic review and meta-analysis. Int J Nurs Knowl 2024; 35:177-185. [PMID: 37378541 DOI: 10.1111/2047-3095.12437] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 06/09/2023] [Indexed: 06/29/2023]
Abstract
PURPOSE To perform a meta-analysis identifying the modifiable risk factors of cognitive frailty in the elderly. METHODS We systematically searched databases including PubMed, EMBASE, China National Knowledge Infrastructure, China Science and Technology Journal Database, Wanfang Data Knowledge Service Platform from January 01, 2017 to March 26, 2022. Quantitative, original research reporting associated factors were included. FINDINGS 7,854 records in total were identified, of which 14 articles (1 prospective, 13 cross-sectional) with 36 factors were included. Studies on cognitive frailty included 20,390 community-dwellers (≥60 years) from three countries. Meta-analysis indicated that depression [OR = 3.60, 95%CI (2.25,5.78), p < 0.01] and sleep problems [OR = 2.36, 95%CI (1.62,3.43), p < 0.01] were associated with cognitive frailty. CONCLUSIONS Effective interventions targeting depression and sleep problems may lower the risk of cognitive frailty in the community seniors but need further study in high-quality, prospective studies. IMPLICATIONS FOR NURSING PRACTICE Building on previous work, the objectives of this systematic review and meta-analysis were to explore potential modifiable risk factors for cognitive frailty in community-dwelling older adults, which is expected to throw light on the prevention of cognitive frailty.
Collapse
Affiliation(s)
- Chen Yuan
- Department of Nursing, Nanjing University of Chinese Medicine, Nanjing, China
| | - Yixiong Zhang
- Department of Nursing, Nanjing University of Chinese Medicine, Nanjing, China
| |
Collapse
|
6
|
Ribeiro BC, de Athayde Costa E Silva A, de Souza LBR, de Araújo Moraes JB, Carneiro SR, Neves LMT. Risk stratification for frailty, impairment and assessment of sleep disorders in community-dwelling older adults. Exp Gerontol 2024; 187:112370. [PMID: 38310982 DOI: 10.1016/j.exger.2024.112370] [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: 12/06/2023] [Revised: 01/22/2024] [Accepted: 01/25/2024] [Indexed: 02/06/2024]
Abstract
BACKGROUND Frailty is associated with an increased susceptibility to functional decline, impairment, hospitalization, and mortality among the older adults. However, the potential reversibility of frailty lies in identifying modifiable factors that could prevent, mitigate, or interrupt its progression. While there is a suggestion that sleep disorders may increase the risk of frailty and impairment, the risk stratification of this relationship remains inconclusive. OBJECTIVE Stratify the risk of frailty and impairment and investigate potential connections with sleep quality, excessive daytime sleepiness, and the risk of obstructive sleep apnea in older adults dwelling in the community. METHODS This was a quantitative cross-sectional investigation. Frailty risk and impairment were stratified using the Frail Non-disabled Questionnaire (for impairment) and the FRAIL Scale (for Frailty). The assessment of excessive daytime sleepiness, sleep quality, and the risk of obstructive sleep apnea involved the employment of the Epworth Sleepiness Scale, Pittsburgh Sleep Quality Index, and the STOP-BANG questionnaire, respectively. RESULTS A total of 109 older adults living in the urban area (86 %, p = 0.010), females (61 %; p = 0.030), median age 68 (64-75) years, with overweight (36 %, p < 0.010) and self-identified as belonging to other racial or ethnic categories (71 %, p < 0.010). According to the impairment assessment, 32 % of participants were classified as disable (p < 0.01). Conversely, as per the frailty evaluation, 33 % were pre-frail and 25 % were identified as frail. Additionally, a substantial proportion experienced poor sleep quality (80 %, p = 0.010), exhibited a moderate risk of obstructive sleep apnea (49 %, p < 0.010), and showed no signs of excessive daytime sleepiness (62 %, p < 0.010). There was a modest correlation between frailty and impairment with poor sleep quality (rho = 0.39; p < 0.001) and the risk of obstructive sleep apnea (rho = 0.26; p = 0.000). However, the was no significant relationship was observed between frailty and impairment and excessive daytime sleepiness (rho = 0.04; p = 0.660). Similarly, a modest correlation was observed between sleep quality (rho = 0.33; p < 0.001), the risk of obstructive sleep apnea (rho = 0.27; p = 0.001), and frailty. Conversely, no correlation was found with excessive daytime sleepiness (rho = 0.05; p = 0.590). Also, the poor sleep quality and the risk of obstructive sleep apnea explain 14 % of the risk of frailty in the population of community-dwelling older adults (r2 = 0.14; p = 0.04). CONCLUSION This study reveals a modest risk of frailty and impairment with sleep quality and the risk of obstructive sleep apnea, but not with excessive daytime sleepiness in community-dwelling older adults.
Collapse
Affiliation(s)
- Breno Caldas Ribeiro
- Graduate Program in Human Movement Sciences, Federal University of Pará, Belém, Pará, Brazil
| | | | | | | | - Saul Rassy Carneiro
- Graduate Program in Human Movement Sciences, Federal University of Pará, Belém, Pará, Brazil
| | | |
Collapse
|
7
|
Xu L, Tao X, Lou Y, Engström M. Sleep quality, frailty and overall health among community-dwelling older people: A longitudinal study. J Adv Nurs 2024; 80:328-338. [PMID: 37438957 DOI: 10.1111/jan.15790] [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: 10/10/2022] [Revised: 05/18/2023] [Accepted: 06/28/2023] [Indexed: 07/14/2023]
Abstract
AIMS The aims of the study were to describe sleep quality among community-dwelling older people; determine the association between sleep quality (total and multidimensional), frailty and overall health; study frailty as a mediator in the association between sleep quality and overall health. DESIGN This longitudinal, correlative study used data from 2020 to 2022. METHODS A total of 181 community-dwelling older people in a city in Southeast China were assessed twice. Sleep quality was measured using the Pittsburgh Sleep Quality Index at Time 1 (year 2020); frailty was measured using the FRAIL scale, and overall health was measured using the EuroQol visual analogue scale at Time 1 and 2 (1 year later). Associations and indirect effects were examined using linear regression analyses using the PROCESS Macro (Model 4). RESULTS Poor sleep quality (higher scores) was associated with increased frailty over time (total scale), as well as subjective sleep quality, sleep duration, sleep efficiency and daytime dysfunction. Mediation analyses indicated that frailty change had an indirect effect on the association between sleep quality total score Time (T) 1 and overall health T2 and between the dimensions subjective sleep quality, sleep duration, sleep efficiency and daytime dysfunction and overall health. All analyses were adjusted for age, multimorbidity and overall health T1. CONCLUSIONS Poor sleep quality is a common problem associated with poor overall health after 1 year, and the progression of frailty mediates this association. IMPACT The findings provide a better understanding of the association between sleep quality and overall health and elucidate the mediating effect of frailty. Regular screening and effective treatment by healthcare providers for sleep problems and frailty in older people are necessary to improve their overall health and enhance healthy ageing. PATIENT OR PUBLIC CONTRIBUTION Participants in the study provided the data used for all data analysis in the manuscript. Patient or public were not involved in data analysis, interpretation or manuscript preparation. Staff in the community health centre helped with data collection.
Collapse
Affiliation(s)
- Lijuan Xu
- Medicine College, Lishui University, Lishui, China
| | - Xuemei Tao
- Medicine College, Lishui University, Lishui, China
| | - Yan Lou
- Medicine College, Lishui University, Lishui, China
| | - Maria Engström
- Department of Caring Science, Faculty of Health and Occupational Studies, University of Gävle, Gävle, China
| |
Collapse
|
8
|
Pradeep Kumar D, Zanotto T, Cozart JS, Bruce AS, Befort C, Siengsukon C, Shook R, Lynch S, Mahmoud R, Simon S, Hibbing PR, Drees B, Huebner J, Bradish T, Robichaud J, Sosnoff JJ, Bruce JM. Association between frailty and sleep quality in people living with multiple sclerosis and obesity: An observational cross-sectional study. Mult Scler Relat Disord 2024; 81:105154. [PMID: 38043367 DOI: 10.1016/j.msard.2023.105154] [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: 08/15/2023] [Revised: 11/20/2023] [Accepted: 11/23/2023] [Indexed: 12/05/2023]
Abstract
BACKGROUND A majority of the people with multiple sclerosis (pwMS) experience sleep disturbances. Frailty is also common in pwMS. The geriatric literature strongly suggests that frailty is associated with worse sleep outcomes in community-dwelling older adults, but this association has yet to be explored among pwMS. This study focused on examining the association between frailty and sleep quality in pwMS. METHODS Seventy-six people with both MS and obesity (mean age: 47.6 ± 10.9 years, 81.6 % female, mean body mass index (BMI): 37.10 ± 5.5 kg/m2, mean Patient Determined Disease Steps (PDDS): 0.82 ± 1.20) were included in this cross-sectional secondary analysis. A comprehensive frailty index (FI) based on 41 health deficits from various health domains was calculated based on standardized procedures. Sleep quality was determined by the Pittsburgh Sleep Quality Index questionnaire (PSQI). RESULTS Overall, 67.1 % of the participants were identified as non-frail (FI ≤ 0.25), and 32.9 % were identified as frail (FI > 0.25). A significant correlation was observed between FI scores and global PSQI scores (ρ = 0.43, p < 0.05). Cross-tabulation analyses revealed that frail participants had worse subjective sleep quality, sleep latency, habitual sleep efficiency, sleep disturbances, daytime dysfunction, and higher use of sleep medications compared to non-frail participants (p < 0.05). CONCLUSIONS The current study identified a significant association between frailty and sleep quality in people with both MS and obesity with minimal disability. These findings underscore the importance of untangling the relationship between frailty and sleep quality in pwMS. These results could lead to a more targeted approach for rehabilitation interventions aiming to improve frailty in MS.
Collapse
Affiliation(s)
- Danya Pradeep Kumar
- Department of Physical Therapy and Rehabilitation Science, School of Health Professions, University of Kansas Medical Center, Kansas City, KS, USA
| | - Tobia Zanotto
- Department of Occupational Therapy Education, School of Health Professions, University of Kansas Medical Center, Kansas City, KS, USA; Mobility Core, University of Kansas Centre for Community Access, Rehabilitation Research, Education and Service, Kansas City, KS, USA; Landon Center on Aging, University of Kansas Medical Center, Kansas City, KS, USA
| | - Julia S Cozart
- Department of Biomedical and Health Informatics, University of Missouri - Kansas City School of Medicine, University of Missouri - Kansas City, Kansas City, MO, USA
| | - Amanda S Bruce
- Center for Children's Healthy Lifestyles and Nutrition, Children's Mercy Hospital, Kansas City, MO, USA; Department of Pediatrics, University of Kansas Medical Center, Kansas City, KS, USA
| | - Christie Befort
- Department of Population Health, University Kansas Medical Center, Kansas City, KS, USA
| | - Catherine Siengsukon
- Department of Physical Therapy and Rehabilitation Science, School of Health Professions, University of Kansas Medical Center, Kansas City, KS, USA
| | - Robin Shook
- Center for Children's Healthy Lifestyles and Nutrition, Children's Mercy Hospital, Kansas City, MO, USA; Department of Pediatrics, University of Kansas Medical Center, Kansas City, KS, USA; School of Medicine, University of Missouri-Kansas City, Kansas City, MO USA
| | - Sharon Lynch
- Department of Neurology, University of Kansas Medical Center, Kansas City, KS, USA
| | - Rola Mahmoud
- Department of Neurology, University of Missouri, Kansas City, Saint Luke's Hospital, Kansas City, MO, USA
| | - Steve Simon
- Department of Biomedical and Health Informatics, University of Missouri - Kansas City School of Medicine, University of Missouri - Kansas City, Kansas City, MO, USA
| | - Paul R Hibbing
- Department of Kinesiology & Nutrition, University of Illinois Chicago, Chicago, IL, USA
| | - Betty Drees
- Department of Biomedical and Health Informatics, University of Missouri - Kansas City School of Medicine, University of Missouri - Kansas City, Kansas City, MO, USA; Department of Internal Medicine, University of Missouri-Kansas City School of Medicine, Kansas City, MO, USA; Graduate School of the Stowers Institute for Medical Research, USA
| | - Joanie Huebner
- UMKC Department of Community and Family Medicine, University Health Lakewood Medical Center, Kansas City, MO, USA
| | - Taylor Bradish
- Department of Biomedical and Health Informatics, University of Missouri - Kansas City School of Medicine, University of Missouri - Kansas City, Kansas City, MO, USA
| | - Jade Robichaud
- Department of Biomedical and Health Informatics, University of Missouri - Kansas City School of Medicine, University of Missouri - Kansas City, Kansas City, MO, USA
| | - Jacob J Sosnoff
- Department of Physical Therapy and Rehabilitation Science, School of Health Professions, University of Kansas Medical Center, Kansas City, KS, USA; Department of Occupational Therapy Education, School of Health Professions, University of Kansas Medical Center, Kansas City, KS, USA; Mobility Core, University of Kansas Centre for Community Access, Rehabilitation Research, Education and Service, Kansas City, KS, USA; Landon Center on Aging, University of Kansas Medical Center, Kansas City, KS, USA
| | - Jared M Bruce
- Department of Biomedical and Health Informatics, University of Missouri - Kansas City School of Medicine, University of Missouri - Kansas City, Kansas City, MO, USA; Departments of Neurology and Psychiatry, University Health, Kansas City, MO, USA.
| |
Collapse
|
9
|
Zeidan RS, McElroy T, Rathor L, Martenson MS, Lin Y, Mankowski RT. Sex differences in frailty among older adults. Exp Gerontol 2023; 184:112333. [PMID: 37993077 DOI: 10.1016/j.exger.2023.112333] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 10/24/2023] [Accepted: 11/14/2023] [Indexed: 11/24/2023]
Abstract
By definition, aging is a natural, gradual and continuous process. On the other hand, frailty reflects the increase in vulnerability to stressors and shortens the time without disease (health span) while longevity refers to the length of life (lifespan). The average life expectancy has significantly increased during the last few decades. A longer lifespan has been accompanied by an increase in frailty and decreased independence in older adults, with major differences existing between men and women. For example, women tend to live longer than men but also experience higher rates of frailty and disability. Sex differences prevent optimization of lifestyle interventions and therapies to effectively prevent frailty. Sex differences in frailty and aging are rooted in a complex interplay between uncontrollable (genetic, epigenetic, physiological), and controllable factors (psychosocial and lifestyle factors). Thus, understanding the underlying causes of sex differences in frailty and aging is essential for developing personalized interventions to promote healthy aging and improve quality of life in older men and women. In this review, we have discussed the key contributors and knowledge gaps related to sex differences in aging and frailty.
Collapse
Affiliation(s)
- Rola S Zeidan
- Department of Physiology and Aging, College of Medicine, University of Florida, Gainesville, FL, United States of America; Department of Health Outcomes and Biomedical Informatics, College of Medicine, University of Florida, Gainesville, FL, United States of America.
| | - Taylor McElroy
- Department of Physiology and Aging, College of Medicine, University of Florida, Gainesville, FL, United States of America; Department of Health Outcomes and Biomedical Informatics, College of Medicine, University of Florida, Gainesville, FL, United States of America.
| | - Laxmi Rathor
- Department of Physiology and Aging, College of Medicine, University of Florida, Gainesville, FL, United States of America.
| | - Matthew S Martenson
- Department of Physiology and Aging, College of Medicine, University of Florida, Gainesville, FL, United States of America.
| | - Yi Lin
- Department of Physiology and Aging, College of Medicine, University of Florida, Gainesville, FL, United States of America.
| | - Robert T Mankowski
- Department of Physiology and Aging, College of Medicine, University of Florida, Gainesville, FL, United States of America.
| |
Collapse
|
10
|
Chang YH, Chen YC, Ku LJE, Chou YT, Chen HY, Su HC, Liu CH, Wu YL, Cheng HJ, Yang YC, Li CY. Association between sleep health and intrinsic capacity among older adults in Taiwan. Sleep Med 2023; 109:98-103. [PMID: 37423025 DOI: 10.1016/j.sleep.2023.06.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 06/11/2023] [Accepted: 06/17/2023] [Indexed: 07/11/2023]
Abstract
Although the association between poor sleep quality and frailty has been previously reported, the relationship between sleep health and intrinsic capacity (IC) remains largely unknown. We aimed to examine the association between sleep health and IC among older adults. This was a cross-sectional study, and 1268 eligible participants completed a questionnaire collecting information on demographic, socioeconomic, lifestyle, sleep health, and IC. Sleep health was measured by the RU-SATED V2.0 scale. High, moderate, and low levels of IC were defined using the Integrated Care for Older People Screening Tool for Taiwanese. The ordinal logistic regression model estimated the odds ratio and corresponding 95% confidence interval. Low IC was significantly associated with age of 80 years or above, female, currently unmarried, uneducated, currently not working, financially dependent, and having emotional disorders. A one-point increase in sleep health was significantly associated with a 9% reduction in the odds of poor IC. An increase in daytime alertness was related to the greatest reduction in poor IC (aOR, 0.64; 95% CI, 0.52-0.79). In addition, the subitems sleep regularity (aOR, 0.77; 95% CI, 0.60-0.99), sleep timing (aOR, 0.80; 95% CI, 0.65-0.99), and sleep duration (aOR, 0.77; 95% CI, 0.61-0.96) were associated with a reduced OR of poor IC but with marginal statistical significance. Our findings showed that sleep health across multiple dimensions is related to IC, particularly daytime alertness in older adults. We suggest developing interventions to improve sleep health and prevent IC decline, which is crucial in causing poor health outcomes.
Collapse
Affiliation(s)
- Ya-Hui Chang
- Department of Public Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Department of Surgery, Massachusetts General Hospital, Boston, MA, United States
| | - Yen-Chin Chen
- Department of Nursing, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Department of Nursing, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Li-Jung Elizabeth Ku
- Department of Public Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Yu-Tsung Chou
- Department of Health Management Center, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Department of Family Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Hung-Yu Chen
- Department of Health Management Center, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Department of Family Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Hui-Chen Su
- Department of Neurology, National Cheng-Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Chieh-Hsiu Liu
- Department of Family Medicine, Taoyuan General Hospital, Ministry of Health and Welfare, Taoyuan, Taiwan
| | - Yi-Lin Wu
- Department of Nursing, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Hsiang-Ju Cheng
- Department of Family Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Yi-Ching Yang
- Department of Public Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Department of Family Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Chung-Yi Li
- Department of Public Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Department of Public Health, College of Public Health, China Medical University, Taichung, Taiwan; Department of Healthcare Administration, College of Medical and Health Science, Asia University, Taichung, Taiwan.
| |
Collapse
|
11
|
Peng S, Chen Y, Li J, Wang Y, Liu X, Wang Y, Gu S, Pei M, Zhang P. Correlation among sleep quality, physical frailty and cognitive function of the older adults in China: the mediating role. Front Public Health 2023; 11:1143033. [PMID: 37680277 PMCID: PMC10482234 DOI: 10.3389/fpubh.2023.1143033] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 08/04/2023] [Indexed: 09/09/2023] Open
Abstract
Objective To explore the correlation among sleep quality, physical frailty, and cognitive function in the older adults in community, and to explore the mediating role of sleep quality. Methods A total of 1,182 community-based older adults were investigated with frailty phenotype (FP), Pittsburgh sleep quality index (PISQI), Montreal cognitive assessment (MoCA) and self-made general information questionnaire. Results The incidence of physical frailty among the older adults in the community was 25.8% and the incidence of cognitive decline was 19.5%. Cognitive function was negatively correlated with physical frailty (r = -0.236, p < 0.01) and sleep quality (r = -0.558, p < 0.01). Sleep quality was positively correlated with physical frailty (r = 0.337, p < 0.01). Conclusion The physical frailty of the older adults has a direct prediction effect on cognitive function, and is regulated by the mediating role of sleep quality. Sleep quality partially mediates the relationship between cognitive dysfunction and physical frailty, which is a new insight into the study of cognition and physical frailty in the older adults. In the future, we can take measures to improve the sleep quality of the older adults, so as to reduce the occurrence of cognitive dysfunction and physical frailty of the older adults.
Collapse
Affiliation(s)
- Shuzhi Peng
- Graduate School of Nursing, Shanghai University of Medicine and Health Sciences, Shanghai, China
- Graduate School of Nursing, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yanping Chen
- Department of General Surgery, Funing People’s Hospital, Yancheng, Jiangsu, China
- School of Nursing, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Jie Li
- School of Public Health, Anhui Medical University, Hefei, Anhui, China
| | - Yan Wang
- Graduate School of Nursing, Huzhou University, Huzhou, Zhejiang, China
| | - Xingyue Liu
- Graduate School of Nursing, Shanghai University of Medicine and Health Sciences, Shanghai, China
- Graduate School of Nursing, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Ying Wang
- Graduate School of Nursing, Shanghai University of Medicine and Health Sciences, Shanghai, China
- Graduate School of Nursing, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Sainan Gu
- Graduate School of Nursing, Shanghai University of Medicine and Health Sciences, Shanghai, China
- Graduate School of Nursing, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Mengyun Pei
- Graduate School of Nursing, Shanghai University of Medicine and Health Sciences, Shanghai, China
- Graduate School of Nursing, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Peng Zhang
- School of Management, Hainan Medical University, Haikou, Hainan, China
- School of Clinical Medicine, Shanghai University of Medicine and Health Sciences, Shanghai, China
| |
Collapse
|
12
|
Alshanberi AM. Frailty in Kingdom of Saudi Arabia-Prevalence and Management, Where Are We? Healthcare (Basel) 2023; 11:1715. [PMID: 37372833 PMCID: PMC10298653 DOI: 10.3390/healthcare11121715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 06/06/2023] [Accepted: 06/08/2023] [Indexed: 06/29/2023] Open
Abstract
A recent report from the United Nations state that the percentage of elderly individuals in the Kingdom of Saudi Arabia (KSA) will witness a sharp increase in the next three decades (5.6% in 2017 to 23% by 2050). This situation will lead to an increased prevalence of comorbidities and hence, will require close monitoring and constant care of such individuals who are prone to suffer from complications such as arthritis, cardiovascular disorders, diabetes, neurological disorders, etc. Frailty is one such age-related phenomenon which enhances the risk of falling, functional restrictions and greater vulnerability to adverse consequences, which tend to lead to institutionalization. Such factors highlight the importance of the urgent awareness for circumventing the progression of frailty toward a compromised health status. This concise report is an attempt to sum up the relevant research articles published with regard to frailty and concomitant diseases in the last 5 years. It also sums up the research on frailty in the KSA elderly population, till date. This article reflects the opinions of an author on tackling such issues through a well-directed mechanism involving interdisciplinary transitional care and geriatric co-management.
Collapse
Affiliation(s)
- Asim Muhammed Alshanberi
- Department of Community Medicine and Pilgrims Health Care, Umm Alqura University, Makkah 24382, Saudi Arabia; or ; Tel.: +966-555-533-389
- Medicine Program, Batterjee Medical College, Jeddah 21442, Saudi Arabia
| |
Collapse
|
13
|
Wahabi H, Fayed AA, Shata Z, Esmaeil S, Alzeidan R, Saeed E, Amer Y, Titi M, Bahkali K, Hneiny L. The Impact of Age, Gender, Temporality, and Geographical Region on the Prevalence of Obesity and Overweight in Saudi Arabia: Scope of Evidence. Healthcare (Basel) 2023; 11:1143. [PMID: 37107976 PMCID: PMC10137821 DOI: 10.3390/healthcare11081143] [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: 03/13/2023] [Revised: 04/04/2023] [Accepted: 04/12/2023] [Indexed: 04/29/2023] Open
Abstract
OBJECTIVES The objectives of this scoping review are to estimate the prevalence of obesity and overweight in the Saudi community and in different age groups, genders, and geographical location, in addition to the change in prevalence over time. METHODS This scoping review of evidence was conducted in accordance with the Joanna Briggs Institute methodology for scoping reviews and was reported following the Preferred Reporting Items for Systematic reviews and Meta-Analyses extension for Scoping Reviews (PRISMA-ScR) guidelines. The population of this review was categorized into four age groups: young adults (18-25 years), adults (26-45), (mid-life adults) (46-60) and old people (60+). Each group was then categorized by gender into males and females. We included studies of adults aged 18 years and above. The pooled prevalence of obesity and overweight of the population, based on BMI, was estimated after stratification based on the age, gender, and geographical area. In addition, the change in the prevalence of obesity/overweight over time from 2011 to 2021 was investigated from the pooled data. The Metaprop program in Stata was used for statistical analysis. RESULTS A total of 39 studies with 640,952 participants were included in this review. The pooled prevalence of obesity and overweight in the age group of ≤25 years old, including both genders, was 30%. However, it was higher in young males (40%) compared to young females (25%). The prevalence of obesity and overweight among young adults has dropped by over 40% between 2012 and 2021. The overall pooled prevalence rate of obesity and overweight in the age groups >25 years old (adults, mid-life, and old people), including both genders, was 66%, with similar prevalence among males (68%) and females (71%). In addition, a similar prevalence was observed among both adult and old people (62% and 65%, respectively), but was higher in the mid-life group (76%). Furthermore, mid-life women had the highest prevalence among all groups (87%), compared to 77% among males in the same age group. The same difference in prevalence between the gender persisted in older females compared to older males (79% vs. 65%, respectively). There is a noticeable drop in the pooled prevalence of overweight and obesity among adults > 25 years old of over 28% between 2011 and 2021. There was no difference in the prevalence of obesity/overweight by geographical region. CONCLUSIONS Despite the noticeable drop in the prevalence of obesity in the Saudi community, the prevalence of high BMI is high in Saudi Arabia irrespective of age, gender, or geographical location. Mid-life women have the highest prevalence of high BMI, which makes them the focus of a tailored strategy for intervention. Further research is needed to investigate which are the most effective interventions to address obesity in the country.
Collapse
Affiliation(s)
- Hayfaa Wahabi
- Research Chair for Evidence-Based Health Care and Knowledge Translation, King Saud University, Riyadh 11362, Saudi Arabia; (H.W.); (S.E.); (Y.A.); (M.T.)
- Department of Family and Community Medicine, College of Medicine, King Saud University Medical City, Riyadh 12372, Saudi Arabia
| | - Amel A. Fayed
- Department of Clinical Sciences, College of Medicine, Princess Nourah Bint Abdulrahman University, Riyadh 84428, Saudi Arabia
| | - Zeinab Shata
- High Institute of Public Health, Alexandria University, Alexandria 21544, Egypt;
| | - Samia Esmaeil
- Research Chair for Evidence-Based Health Care and Knowledge Translation, King Saud University, Riyadh 11362, Saudi Arabia; (H.W.); (S.E.); (Y.A.); (M.T.)
| | - Rasmieh Alzeidan
- College of Medicine, Cardiac Sciences Department, King Saud University, Riyadh 11362, Saudi Arabia;
| | - Elshazaly Saeed
- College of Medicine, King Saud University, Riyadh 11362, Saudi Arabia;
- Pediatric Department, King Saud University, Riyadh 11362, Saudi Arabia
- Prince Abdullah Bin Khaled Coeliac Disease Research Chair, Pediatric Department, King Saud University, Riyadh 11362, Saudi Arabia
| | - Yasser Amer
- Research Chair for Evidence-Based Health Care and Knowledge Translation, King Saud University, Riyadh 11362, Saudi Arabia; (H.W.); (S.E.); (Y.A.); (M.T.)
- Pediatric Department, King Saud University, Riyadh 11362, Saudi Arabia
- Corporate Quality Management Department, King Saud University Medical City, Riyadh 11362, Saudi Arabia
| | - Maher Titi
- Research Chair for Evidence-Based Health Care and Knowledge Translation, King Saud University, Riyadh 11362, Saudi Arabia; (H.W.); (S.E.); (Y.A.); (M.T.)
- Corporate Quality Management Department, King Saud University Medical City, Riyadh 11362, Saudi Arabia
| | - Khawater Bahkali
- Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London WC1E 7HT, UK;
- Department of Public Health Intelligence, Public Health Authority, Riyadh 11614, Saudi Arabia
| | - Layal Hneiny
- Wegner Health Sciences Library, University of South Dakota, Sioux Falls, SD 57069, USA;
| |
Collapse
|
14
|
Lorber M, Kmetec S, Davey A, Mlinar Reljić N, Fekonja Z, Kegl B. Associations between Sleep Quality, Frailty, and Quality of Life among Older Adults in Community and Nursing Home Settings. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:4937. [PMID: 36981847 PMCID: PMC10049428 DOI: 10.3390/ijerph20064937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 03/03/2023] [Accepted: 03/08/2023] [Indexed: 06/18/2023]
Abstract
Poor sleep quality is prevalent among older adults, but limited data document associations between frailty and quality of life comparing individuals living in the community with those in nursing homes. This cross-sectional study (conducted between August and November 2019) included 831 older adults (mean age 76.5 years) from Slovenia's community and nursing home settings. The results showed comorbidity in 38% of community-dwelling older adults and 31% of older adults in nursing homes. The prevalence of frailty among community-dwelling older adults was 36.5%, and among older adults in a nursing home was 58.5%. A total of 76% of community-dwelling older adults and 95.8% of nursing home residents reported poor sleep quality. Sleep quality and frailty predict 42.3% of the total variability of quality of life for older adults in nursing homes and 34.8% for community-dwelling older adults. The study's results indicate that the quality of life can be affected by factors (e.g., worse sleep quality and frailty) among older adults, regardless of being a resident or from the community. Understanding how sleep quality is affected by social, environmental, and biological factors can help improve sleep quality and potentially the quality of life of older adults.
Collapse
Affiliation(s)
- Mateja Lorber
- Faculty of Health Sciences, University of Maribor, Zitna Ulica 15, 2000 Maribor, Slovenia
| | - Sergej Kmetec
- Faculty of Health Sciences, University of Maribor, Zitna Ulica 15, 2000 Maribor, Slovenia
| | - Adam Davey
- College of Health Sciences, University of Delaware, 210 South College Avenue, Newark, NJ 19716, USA
| | - Nataša Mlinar Reljić
- Faculty of Health Sciences, University of Maribor, Zitna Ulica 15, 2000 Maribor, Slovenia
| | - Zvonka Fekonja
- Faculty of Health Sciences, University of Maribor, Zitna Ulica 15, 2000 Maribor, Slovenia
| | - Barbara Kegl
- Faculty of Health Sciences, University of Maribor, Zitna Ulica 15, 2000 Maribor, Slovenia
| |
Collapse
|
15
|
Kume Y, Kodama A. Association between recovery of frailty state and the nonparametric rest-activity rhythm patterns in the elderly community-dwellers: A 6-month follow-up study during Covid-19 pandemic. Chronobiol Int 2022; 39:1665-1673. [PMID: 36303416 DOI: 10.1080/07420528.2022.2136524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Reversibility of frailty in the elderly has been discussed comprehensively and but association between recovery of frail state and rest-activity rhythm (RAR) patterns remains unclear. The aim of the current study was to examine a predictor of RAR patterns at the baseline against change of frail state after the intervention in the elderly community-dwellers. This study was performed during Covid-19 pandemic, at the period from April in 2020 to March in 2022. Participants were publicly recruited from senior's exercise program hosted by Akita city or Yurihonjo city. The revised Japanese version of the Cardiovascular Health Study criteria (revised J-CHS criteria) was used to assess frail state in each participant before and after the 6-month intervention. To measure the nonparametric RAR parameters consisting of interdaily stability (IS), intra-daily variability (IV), relative amplitude (RA) and average physical activity for the most active 10-h span (M10) or for the least active 5-h span (L5) over the average 24-h profile, an Actiwatch Spectrum Plus device was worn on each participant's non-dominant wrist for seven continuous days. The final samples were 75 participants except for persons with uncompleted data, classified into the improved group (n = 12), the maintained group (n = 53) and the deteriorated group (n = 10) according to frail alteration after the six-month intervention. As a result of the multinomial logistic regression analysis with the reference of the maintained group, the improvement of frail state associated with a low value of IS and total night-sleep time at the baseline, and M10 and L5 at the initial time were also able to predict worsening of frail state after the six-months intervention. A result of this follow-up study provides grounds for our proposal that alterations of RAR patterns in the elderly could be observed in association with recovery or worsening of frail state after the intervention. The potential finding, however, warrants further longitudinal investigation.
Collapse
Affiliation(s)
- Yu Kume
- Department of Occupational Therapy, Akita University, Graduate School of Medicine, Course of Health Sciences, Akita, Japan
| | - Ayuto Kodama
- Department of Occupational Therapy, Akita University, Graduate School of Medicine, Course of Health Sciences, Akita, Japan
| |
Collapse
|