1
|
Kim DH. Unleashing frailty from laboratory into real world: A critical step toward frailty-guided clinical care of older adults. J Am Geriatr Soc 2024. [PMID: 39166879 DOI: 10.1111/jgs.19151] [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: 03/08/2024] [Revised: 06/21/2024] [Accepted: 06/30/2024] [Indexed: 08/23/2024]
Abstract
Understanding patients' degree of frailty is crucial for tailoring clinical care for older adults based on their physiologic reserve and health needs ("frailty-guided clinical care"). Two prerequisites for frailty-guided clinical care are: (1) access to frailty information at the point of care and (2) evidence to inform decisions based on frailty information. Recent advancements include web-based frailty assessment tools and their electronic health records integration for time-efficient, standardized assessments in clinical practice. Additionally, database frailty scores from administrative claims and electronic health records data enable scalable assessments and evaluation of the effectiveness and safety of medical interventions across different frailty levels using real-world data. Given limited evidence from clinical trials, real-world database studies can complement trial results and help treatment decisions for individuals with frailty. This article, based on the Thomas and Catherine Yoshikawa Award lecture I gave at the American Geriatrics Society Annual Meeting in Long Beach, California, on May 5, 2023, outlines our group's contributions: (1) developing and integrating a frailty index calculator (Senior Health Calculator) into the electronic health records at an academic medical center; (2) developing a claims-based frailty index for Medicare claims; (3) applying this index to evaluate the effect of medical interventions for patients with and without frailty; and (4) efforts to disseminate frailty assessment tools through the launch of the eFrailty website and the forthcoming addition of the claims-based frailty index to the Centers for Medicare and Medicaid Services Chronic Conditions Data Warehouse. This article concludes with future directions for frailty-guided clinical care.
Collapse
Affiliation(s)
- Dae Hyun Kim
- Hinda and Arthur Marcus Institute for Aging Research, Hebrew SeniorLife, Division of Gerontology, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA
| |
Collapse
|
2
|
Pu Y, Sun Z, Zhang H, Huang Q, Wang Z, Mei Z, Wang P, Kong M, Yang W, Lin C, Zhou X, Lin S, Huang Q, Huang L, Sun L, Yuan C, Xu Q, Tang H, Wang X, Zheng Y. Gut microbial features and circulating metabolomic signatures of frailty in older adults. NATURE AGING 2024:10.1038/s43587-024-00678-0. [PMID: 39054372 DOI: 10.1038/s43587-024-00678-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 07/03/2024] [Indexed: 07/27/2024]
Abstract
Frailty, a multidimensional indicator of suboptimal aging, reflects cumulative declines across multiple physiological systems. Although age-related changes have been reported in gut microbiota, their role in healthy aging remains unclear. In this study, we calculated frailty index (FI) from 33 health-related items to reflect the overall health status of 1,821 older adults (62-96 years, 55% female) and conducted multi-omics analysis using gut metagenomic sequencing data and plasma metabolomic data. We identified 18 microbial species and 17 metabolites shifted along with frailty severity, with stronger links observed in females. The associations of nine species, including various Clostridium species and Faecalibacterium prausnitzii, with FI were reproducible in two external populations. Plasma glycerol levels, white blood cell count and kidney function partially mediated these associations. A composite microbial score derived from FI significantly predicted 2-year mortality (adjusted hazard ratio across extreme quartiles, 2.86; 95% confidence interval, 1.38-5.93), highlighting the potential of microbiota-based strategies for risk stratification in older adults.
Collapse
Affiliation(s)
- Yanni Pu
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, School of Life Sciences, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Zhonghan Sun
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, School of Life Sciences, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Hui Zhang
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, School of Life Sciences, Fudan University, Shanghai, China
- School of Global Health, Chinese Center for Tropical Diseases Research, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qingxia Huang
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, School of Life Sciences, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Zhengdong Wang
- Department of Gastroenterology, Rugao People's Hospital, Rugao, China
| | - Zhendong Mei
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, School of Life Sciences, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Peilu Wang
- Ministry of Education Key Laboratory of Public Health Safety, School of Public Health, Institute of Nutrition, Fudan University, Shanghai, China
| | - Mengmeng Kong
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, School of Life Sciences, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Wenjun Yang
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, School of Life Sciences, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Chenhao Lin
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, School of Life Sciences, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Xiaofeng Zhou
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, School of Life Sciences, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Shuchun Lin
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, School of Life Sciences, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Qiumin Huang
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, School of Life Sciences, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Lili Huang
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, School of Life Sciences, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Liang Sun
- Ministry of Education Key Laboratory of Public Health Safety, School of Public Health, Institute of Nutrition, Fudan University, Shanghai, China
| | - Changzheng Yuan
- School of Public Health, Zhejiang University School of Medicine, Hangzhou, China
| | - Qian Xu
- Institute of Gut Microbiota Research and Engineering Development, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Huiru Tang
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, School of Life Sciences, Zhongshan Hospital, Fudan University, Shanghai, China.
| | - Xiaofeng Wang
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, School of Life Sciences, Fudan University, Shanghai, China.
- National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China.
| | - Yan Zheng
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, School of Life Sciences, Zhongshan Hospital, Fudan University, Shanghai, China.
- Ministry of Education Key Laboratory of Public Health Safety, School of Public Health, Institute of Nutrition, Fudan University, Shanghai, China.
- National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China.
| |
Collapse
|
3
|
Courish MK, O'Brien MW, Maxwell SP, Mekari S, Kimmerly DS, Theou O. Relationship between frailty and executive function by age and sex in the Canadian Longitudinal Study on Aging. GeroScience 2024:10.1007/s11357-024-01256-3. [PMID: 39014131 DOI: 10.1007/s11357-024-01256-3] [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: 01/03/2024] [Accepted: 06/12/2024] [Indexed: 07/18/2024] Open
Abstract
Frailty reflects age-related damage to multiple physiological systems. Executive dysfunction is often a presenting symptom of diseases characterized by cognitive impairment. A decline in cardiovascular health is associated with worse executive function. We tested the hypothesis that higher frailty would be associated with executive dysfunction and that cardiovascular health would mediate this relationship. Middle- and older-aged adults at baseline (n = 29,591 [51% female]) and 3-year follow-up (n = 25,488 [49% females]) from the Canadian Longitudinal Study on Aging (comprehensive cohort) were included. Frailty was determined at baseline from a 61-item index, a cumulative cardiovascular health score was calculated from 30 variables at baseline, and participants completed a word-color Stroop task as an assessment of executive function. Multiple linear regressions and mediation analyses of cardiovascular health were conducted between frailty, Stroop interference-condition reaction time, and cardiovascular health in groups stratified by both age and sex (middle-aged males [MM], middle-aged females [MF], older-aged males [OM], older-aged females [OF]). Frailty (MM, 0.15 ± 0.05; MF, 0.16 ± 0.06; OM, 0.21 ± 0.06; OF, 0.23 ± 0.06) was negatively associated with cardiovascular health (MM, 0.12 ± 0.08; MF, 0.11 ± 0.07; OM, 0.20 ± 0.10; OF, 0.18 ± 0.09; β > 0.037, p < 0.001), as well as the Stroop reaction time at 3-year follow-up (MM, 23.7 ± 7.9; MF, 23.1 ± 7.3; OM, 32.9 ± 13.1; OF, 30.9 ± 12.0; β > 2.57, p < 0.001) across all groups when adjusted for covariates. Cardiovascular health was a partial (~ 10%) mediator between frailty and reaction time, aside from MFs. In conclusion, higher frailty levels are associated with executive dysfunction, which was partially mediated by cardiovascular health. Strategies to improve frailty and better cardiovascular health may be useful for combatting the age-related decline in executive function.
Collapse
Affiliation(s)
- Molly K Courish
- Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, NS, Canada
| | - Myles W O'Brien
- Geriatric Medicine Research, Dalhousie University & Nova Scotia Health, Halifax, NS, Canada
- School of Physiotherapy (Faculty of Health) and Department of Medicine (Faculty of Medicine), Division of Geriatric Medicine, & Geriatric Medicine Research, Dalhousie University & Nova Scotia Health, Halifax, NS, B3H 4R2, Canada
- Department of Medicine, Université de Sherbrooke, Sherbrooke, QC, Canada
- Centre de Formation Médicale du Nouveau-Brunswick, Université de Sherbrooke, Moncton, Canada
| | - Selena P Maxwell
- Geriatric Medicine Research, Dalhousie University & Nova Scotia Health, Halifax, NS, Canada
| | - Said Mekari
- Department of Medicine, Université de Sherbrooke, Sherbrooke, QC, Canada
- Centre de Formation Médicale du Nouveau-Brunswick, Université de Sherbrooke, Moncton, Canada
| | - Derek S Kimmerly
- Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, NS, Canada
| | - Olga Theou
- Geriatric Medicine Research, Dalhousie University & Nova Scotia Health, Halifax, NS, Canada.
- School of Physiotherapy (Faculty of Health) and Department of Medicine (Faculty of Medicine), Division of Geriatric Medicine, & Geriatric Medicine Research, Dalhousie University & Nova Scotia Health, Halifax, NS, B3H 4R2, Canada.
| |
Collapse
|
4
|
Vijenthira A, Li X, Crump M, Hay AE, Shepherd L, Meyer RM, Djurfeldt M, Chen BE, Prica A. Development and testing of a lymphoma clinical trial-specific frailty index: a secondary analysis of the NCIC-CTG LY.12 clinical trial. Leuk Lymphoma 2024:1-8. [PMID: 38982633 DOI: 10.1080/10428194.2024.2370437] [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: 01/03/2024] [Accepted: 06/14/2024] [Indexed: 07/11/2024]
Abstract
The prevalence of frailty in clinical trials of lymphoma is unknown. We conducted a secondary analysis of the phase III LY.12 trial in which patients with relapsed aggressive non-Hodgkin lymphoma were randomized to different salvage regimens before autologous stem cell transplant. The primary objective was to construct a lymphoma clinical trials-specific frailty index (LyFI) using previously described methods. The secondary objective was to describe the association of frailty withover all and event-free survival (OS, EFS). The LyFI was constructed using 619 patients, and11% (N = 70) were classified as frail. Frailty was associated with EFS (HR 1.94, 95%CI 1.53-2.46) and OS (HR 2.01, 95%CI 1.57-2.58) in univariable analysis, but was only significant as a continuous (not binary) variable in multivariable analysis controlling for prognostic score, suggesting limitations of a FI in this trial population. Future work could validate the FI using clinical assessments and/or apply it to an older trial population.
Collapse
Affiliation(s)
- Abi Vijenthira
- Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre, Toronto, ON, USA
| | - Xinzhi Li
- School of Pharmacy, Macau University of Science and Technology, Macau, China
- Canadian Cancer Trials Group, Cancer Research Institute, Kingston, ON, USA
| | - Michael Crump
- Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre, Toronto, ON, USA
| | - Annette E Hay
- Canadian Cancer Trials Group, Cancer Research Institute, Kingston, ON, USA
- Department of Medicine, Queen's University, Kingston, Canada
| | - Lois Shepherd
- Canadian Cancer Trials Group, Cancer Research Institute, Kingston, ON, USA
- Department of Pathology and Molecular Medicine, Kingston, Canada
| | - Ralph M Meyer
- Department of Oncology, Juravinski Hospital and Cancer Centre, Queen's University, Hamilton, Canada
| | - Marina Djurfeldt
- Canadian Cancer Trials Group, Cancer Research Institute, Kingston, ON, USA
| | - Bingshu E Chen
- Canadian Cancer Trials Group, Cancer Research Institute, Kingston, ON, USA
| | - Anca Prica
- Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre, Toronto, ON, USA
| |
Collapse
|
5
|
O'Brien MW, Theou O. Relation between frailty and hypertension is partially mediated by physical activity among males and females in the Canadian Longitudinal Study on Aging. Am J Physiol Heart Circ Physiol 2024; 327:H108-H117. [PMID: 38758123 DOI: 10.1152/ajpheart.00179.2024] [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: 03/21/2024] [Revised: 05/14/2024] [Accepted: 05/14/2024] [Indexed: 05/18/2024]
Abstract
Frailty reflects the heterogeneity in aging and may lead to the development of hypertension and heart disease, but the frailty-cardiovascular relationship and whether physical activity modifies this relationship in males and females are unclear. We tested whether higher frailty was positively associated with hypertension and heart disease in males and females and whether habitual movement mediated this relationship. The relationship between baseline frailty with follow-up hypertension and heart disease was investigated using the Canadian Longitudinal Study on Aging at 3-year follow-up data (males: n = 13,095; females: n = 13,601). Frailty at baseline was determined via a 73-item deficit-based index, activity at follow-up was determined via the Physical Activity Scale for the Elderly, and cardiovascular function was self-reported. Higher baseline frailty level was associated with a greater likelihood of hypertension and heart disease at follow-up, with covariate-adjusted odds ratios of 1.08-1.09 (all, P < 0.001) for a 0.01 increase in frailty index score. Among males and females, sitting time and strenuous physical activity were independently associated with hypertension, with these activity behaviors being partial mediators (except male-sitting time) for the frailty-hypertension relationship (explained 5-10% of relationship). The strength of this relationship was stronger among females. Only light-moderate activity partially mediated the relationship (∼6%) between frailty and heart disease in females, but no activity measure was a mediator for males. Higher frailty levels were associated with a greater incidence of hypertension and heart disease, and strategies that target increases in physical activity and reducing sitting may partially uncouple this relationship with hypertension, particularly among females.NEW & NOTEWORTHY Longitudinally, our study demonstrates that higher baseline frailty levels are associated with an increased risk of hypertension and heart disease in a large sample of Canadian males and females. Movement partially mediated this relationship, particularly among females.
Collapse
Affiliation(s)
- Myles W O'Brien
- Faculty of Health, School of Physiotherapy, Dalhousie University, Halifax, Nova Scotia, Canada
- Faculty of Medicine, Department of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada
- Geriatric Medicine Research, Dalhousie University, Halifax, Nova Scotia, Canada
- Nova Scotia Health, Halifax, Nova Scotia, Canada
- Department of Medicine, Université de Sherbrooke, Sherbrooke, Quebec, Canada
- Centre de Formation Médicale Du Nouveau-Brunswick, Université de Sherbrooke, Moncton, New Brunswick, Canada
| | - Olga Theou
- Faculty of Health, School of Physiotherapy, Dalhousie University, Halifax, Nova Scotia, Canada
- Faculty of Medicine, Department of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada
- Geriatric Medicine Research, Dalhousie University, Halifax, Nova Scotia, Canada
- Nova Scotia Health, Halifax, Nova Scotia, Canada
| |
Collapse
|
6
|
Blodgett JM, Pérez-Zepeda MU, Godin J, Kehler DS, Andrew MK, Kirkland S, Rockwood K, Theou O. Prognostic accuracy of 70 individual frailty biomarkers in predicting mortality in the Canadian Longitudinal Study on Aging. GeroScience 2024; 46:3061-3069. [PMID: 38182858 PMCID: PMC11009196 DOI: 10.1007/s11357-023-01055-2] [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: 08/15/2023] [Accepted: 12/22/2023] [Indexed: 01/07/2024] Open
Abstract
The frailty index (FI) uses a deficit accumulation approach to derive a single, comprehensive, and replicable indicator of age-related health status. Yet, many researchers continue to seek a single "frailty biomarker" to facilitate clinical screening. We investigated the prognostic accuracy of 70 individual biomarkers in predicting mortality, comparing each with a composite FI. A total of 29,341 individuals from the comprehensive cohort of the Canadian Longitudinal Study on Aging were included (mean, 59.4 ± 9.9 years; 50.3% female). Twenty-three blood-based biomarkers and 47 test-based biomarkers (e.g., physical, cardiac, cardiology) were examined. Two composite FIs were derived: FI-Blood and FI-Examination. Mortality status was ascertained using provincial vital statistics linkages and contact with next of kin. Areas under the curve were calculated to compare prognostic accuracy across models (i.e., age, sex, biomarker, FI) in predicting mortality. Compared to an age-sex only model, the addition of individual biomarkers demonstrated improved model fit for 24/70 biomarkers (11 blood, 13 test-based). Inclusion of FI-Blood or FI-Examination improved mortality prediction when compared to any of the 70 biomarker-age-sex models. Individual addition of seven biomarkers (walking speed, chair rise, time up and go, pulse, red blood cell distribution width, C-reactive protein, white blood cells) demonstrated an improved fit when added to the age-sex-FI model. FI scores had better mortality risk prediction than any biomarker. Although seven biomarkers demonstrated improved prognostic accuracy when considered alongside an FI score, all biomarkers had worse prognostic accuracy on their own. Rather than a single biomarker test, implementation of routine FI assessment in clinical settings may provide a more accurate and reliable screening tool to identify those at increased risk of adverse outcomes.
Collapse
Affiliation(s)
- Joanna M Blodgett
- Division of Geriatric Medicine, Dalhousie University and Nova Scotia Health, Halifax, NS, Canada.
- Division of Surgery Interventional Science, Institute of Sport Exercise and Health, University College London, London, UK.
| | - Mario Ulisses Pérez-Zepeda
- Division of Geriatric Medicine, Dalhousie University and Nova Scotia Health, Halifax, NS, Canada
- Instituto Nacional de Geriatría, Mexico City, Mexico
- Centro de Investigación en Ciencias de La Salud (CICSA), FCS, Universidad Anáhuac México Campus Norte, Huixquilucan, Edo. de México, Lomas Anahuac, Mexico
| | - Judith Godin
- Division of Geriatric Medicine, Dalhousie University and Nova Scotia Health, Halifax, NS, Canada
| | - Dustin Scott Kehler
- Division of Geriatric Medicine, Dalhousie University and Nova Scotia Health, Halifax, NS, Canada
- School of Physiotherapy, Dalhousie University, Halifax, NS, Canada
| | - Melissa K Andrew
- Division of Geriatric Medicine, Dalhousie University and Nova Scotia Health, Halifax, NS, Canada
| | - Susan Kirkland
- Division of Geriatric Medicine, Dalhousie University and Nova Scotia Health, Halifax, NS, Canada
- Department of Community Health and Epidemiology, Dalhousie University, Halifax, NS, Canada
| | - Kenneth Rockwood
- Division of Geriatric Medicine, Dalhousie University and Nova Scotia Health, Halifax, NS, Canada
| | - Olga Theou
- Division of Geriatric Medicine, Dalhousie University and Nova Scotia Health, Halifax, NS, Canada
- School of Physiotherapy, Dalhousie University, Halifax, NS, Canada
| |
Collapse
|
7
|
O’Brien MW, Maxwell SP, Moyer R, Rockwood K, Theou O. Development and validation of a frailty index for use in the osteoarthritis initiative. Age Ageing 2024; 53:afae125. [PMID: 38935532 PMCID: PMC11210396 DOI: 10.1093/ageing/afae125] [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: 11/01/2023] [Indexed: 06/29/2024] Open
Abstract
BACKGROUND The Osteoarthritis Initiative (OAI) evaluates the development and progression of osteoarthritis. Frailty captures the heterogeneity in aging. Use of this resource-intensive dataset to answer aging-related research questions could be enhanced by a frailty measure. OBJECTIVE To: (i) develop a deficit accumulation frailty index (FI) for the OAI; (ii) examine its relationship with age and compare between sexes, (iii) validate the FI versus all-cause mortality and (iv) compare this association with mortality with a modified frailty phenotype. DESIGN OAI cohort study. SETTING North America. SUBJECTS An FI was determined for 4,755/4,796 and 4,149/4,796 who had a valid FI and frailty phenotype. METHODS Fifty-nine-variables were screened for inclusion. Multivariate Cox regression evaluated the impact of FI or phenotype on all-cause mortality at follow-up (up to 146 months), controlling for age and sex. RESULTS Thirty-one items were included. FI scores (0.16 ± 0.09) were higher in older adults and among females (both, P < 0.001). By follow-up, 264 people had died (6.4%). Older age, being male, and greater FI were associated with a higher risk of all-cause mortality (all, P < 0.001). The model including FI was a better fit than the model including the phenotype (AIC: 4,167 vs. 4,178) and was a better predictor of all-cause mortality than the phenotype with an area under receiver operating characteristic curve: 0.652 vs. 0.581. CONCLUSION We developed an FI using the OAI and validated it in relation to all-cause mortality. The FI may be used to study aging on clinical, functional and structural aspects of osteoarthritis included in the OAI.
Collapse
Affiliation(s)
- Myles W O’Brien
- Department of Medicine (Faculty of Medicine), Dalhousie University, Halifax, Nova Scotia, Canada
- School of Physiotherapy (Faculty of Health), Dalhousie University, Halifax, Nova Scotia, Canada
- Department of Medicine, Université de Sherbrooke, Sherbrooke, Quebec, Canada
- Centre de Formation Médicale du Nouveau-Brunswick, Université de Sherbrooke, Moncton, New Brunswick, Canada
| | - Selena P Maxwell
- Department of Medicine (Faculty of Medicine), Dalhousie University, Halifax, Nova Scotia, Canada
| | - Rebecca Moyer
- School of Physiotherapy (Faculty of Health), Dalhousie University, Halifax, Nova Scotia, Canada
| | - Kenneth Rockwood
- Department of Medicine (Faculty of Medicine), Dalhousie University, Halifax, Nova Scotia, Canada
| | - Olga Theou
- Department of Medicine (Faculty of Medicine), Dalhousie University, Halifax, Nova Scotia, Canada
- School of Physiotherapy (Faculty of Health), Dalhousie University, Halifax, Nova Scotia, Canada
| |
Collapse
|
8
|
Pasquet R, Xu M, Sylvestre MP, Keezer MR. Comparison of three frailty measures for predicting hospitalization and mortality in the Canadian Longitudinal Study on Aging. Aging Clin Exp Res 2024; 36:48. [PMID: 38418612 PMCID: PMC10902012 DOI: 10.1007/s40520-024-02706-w] [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: 08/14/2023] [Accepted: 01/17/2024] [Indexed: 03/02/2024]
Abstract
BACKGROUND Few studies have compared different measures of frailty for predicting adverse outcomes. It remains unknown which frailty measurement approach best predicts healthcare utilization such as hospitalization and mortality. AIMS This study aims to compare three approaches to measuring frailty-grip strength, frailty phenotype, and frailty index-in predicting hospitalization and mortality among middle-aged and older Canadians. METHODS We analyzed baseline and the first 3-year follow-up data for 30,097 participants aged 45 to 85 years from the comprehensive cohort of the Canadian Longitudinal Study on Aging (CLSA). Using separate logistic regression models adjusted for multimorbidity, age and biological sex, we predicted participants' risks for overnight hospitalization in the past 12 months and mortality, at the first 3-year follow-up, using each of the three frailty measurements at baseline. Model discrimination was assessed using Harrell's c-statistic and calibration assessed using calibration plots. RESULTS The predictive performance of all three measures of frailty were roughly similar when predicting overnight hospitalization and mortality risk among CLSA participants. Model discrimination measured using c-statistics ranged from 0.67 to 0.69 for hospitalization and 0.79 to 0.80 for mortality. All measures of frailty yielded strong model calibration. DISCUSSION AND CONCLUSION All three measures of frailty had similar predictive performance. Discrimination was modest for predicting hospitalization and superior in predicting mortality. This likely reflects the objective nature of mortality as an outcome and the challenges in reducing the complex concept of healthcare utilization to a single variable such as any overnight hospitalization.
Collapse
Affiliation(s)
- Romain Pasquet
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), 1000, Rue Saint-Denis, Montréal, QC, H2X 0C1, Canada
| | - Mengting Xu
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), 1000, Rue Saint-Denis, Montréal, QC, H2X 0C1, Canada
- School of Public Health, Université de Montréal, Montreal, QC, Canada
| | - Marie-Pierre Sylvestre
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), 1000, Rue Saint-Denis, Montréal, QC, H2X 0C1, Canada
- School of Public Health, Université de Montréal, Montreal, QC, Canada
| | - Mark R Keezer
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), 1000, Rue Saint-Denis, Montréal, QC, H2X 0C1, Canada.
- School of Public Health, Université de Montréal, Montreal, QC, Canada.
- Department of Neurosciences, Université de Montréal, Montreal, QC, Canada.
| |
Collapse
|
9
|
Evans JK, Usoh CO, Simpson FR, Espinoza S, Hazuda H, Pandey A, Beckner T, Espeland MA. Long-term Impact of a 10-Year Intensive Lifestyle Intervention on a Deficit Accumulation Frailty Index: Action for Health in Diabetes Trial. J Gerontol A Biol Sci Med Sci 2023; 78:2119-2126. [PMID: 36946420 PMCID: PMC10613011 DOI: 10.1093/gerona/glad088] [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: 11/13/2022] [Indexed: 03/23/2023] Open
Abstract
BACKGROUND Multidomain lifestyle interventions may slow aging as captured by deficit accumulation frailty indices; however, it is unknown whether benefits extend beyond intervention delivery. METHODS We developed a deficit accumulation frailty index (FI-E) to span the 10 years that the Action for Health in Diabetes (Look AHEAD) randomized controlled clinical trial delivered interventions (a multidomain lifestyle intervention focused on caloric restriction, increased physical activity, and diet compared to a control condition) and to extend across an additional 8 years post-delivery. The study cohort included 5 145 individuals, aged 45-76 years at enrollment, who had type 2 diabetes and either obesity or overweight. RESULTS Overall, FI-E scores were relatively lower among lifestyle participants throughout follow-up, averaging 0.0130 [95% confidence interval: 0.0104, 0.0156] (p < .001) less across the 18 years. During Years 1-8, the mean relative difference between control and lifestyle participants' FI-E scores was 0.0139 [0.0115, 0.0163], approximately 10% of the baseline level. During Years 9-18, this average difference was 0.0107 [0.0066, 0.0148]. Benefits were comparable for individuals grouped by baseline age and body mass index and sex but were not evident for those entering the trial with a history of cardiovascular disease. CONCLUSIONS Multidomain lifestyle intervention may slow biological aging long term, as captured by an FI-E. Clinical Trials Registration Number: NCT00017953.
Collapse
Affiliation(s)
- Joni K Evans
- Department of Biostatistics and Data Science, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - Chinenye O Usoh
- Department of Internal Medicine, Section on Endocrinology and Metabolism, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - Felicia R Simpson
- Department of Mathematics, Winston-Salem State University, Winston-Salem, North Carolina, USA
| | - Sara Espinoza
- Division of Geriatrics, Gerontology & Palliative Medicine, University of Texas Health San Antonio, San Antonio, Texas, USA
| | - Helen Hazuda
- Department of Medicine, University of Texas Health San Antonio, San Antonio, Texas, USA
| | - Ambarish Pandey
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Tara Beckner
- Department of Biostatistics and Data Science, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - Mark A Espeland
- Department of Biostatistics and Data Science, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
- Sticht Center for Healthy Aging and Alzheimer’s Prevention, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| |
Collapse
|
10
|
Huffman C, Nájera H, Pérez Zepeda MU. On the comparability of frailty scores under the accumulation of deficits approach. PLoS One 2023; 18:e0292129. [PMID: 37756306 PMCID: PMC10530008 DOI: 10.1371/journal.pone.0292129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 09/12/2023] [Indexed: 09/29/2023] Open
Abstract
BACKGROUND While the cumulative deficit model is arguably the most popular instrument for population-level frailty screening, several questions remain unanswered regarding the comparability of the resulting scores across subpopulations. METHODS Based on data from the five waves of the Mexican Health and Aging Study (MHAS) we draw upon the alignment method to test for measurement invariance of frailty scores as per the accumulation of deficits approach. RESULTS Our results show that adjusting for measurement non-invariance not only improves predictive validity of our frailty measures, but resulting scores are more consistent with what is theoretically expected from them in longitudinal research. CONCLUSIONS There are clear potential benefits of measurement invariance testing as a general analytical framework from which to tackle with issues of comparability in frailty research.
Collapse
Affiliation(s)
- Curtis Huffman
- Programa Universitario de Estudios del Desarrollo, Coordinación de Humandiades, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico City, Mexico
| | - Héctor Nájera
- Programa Universitario de Estudios del Desarrollo, Coordinación de Humandiades, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico City, Mexico
| | - Mario Ulises Pérez Zepeda
- Departamento de Investigación, Instituo Nacional de Geriatría, Secretaría de Salud, Mexico City, Mexico
| |
Collapse
|
11
|
Efficient representations of binarized health deficit data: the frailty index and beyond. GeroScience 2023:10.1007/s11357-022-00723-z. [PMID: 36705846 PMCID: PMC10400752 DOI: 10.1007/s11357-022-00723-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 12/29/2022] [Indexed: 01/28/2023] Open
Abstract
We investigated efficient representations of binarized health deficit data using the 2001-2002 National Health and Nutrition Examination Survey (NHANES). We compared the abilities of features to compress health deficit data and to predict adverse outcomes. We used principal component analysis (PCA) and several other dimensionality reduction techniques, together with several varieties of the frailty index (FI). We observed that the FI approximates the first - primary - component obtained by PCA and other compression techniques. Most adverse outcomes were well predicted using only the FI. While the FI is therefore a useful technique for compressing binary deficits into a single variable, additional dimensions were needed for high-fidelity compression of health deficit data. Moreover, some outcomes - including inflammation and metabolic dysfunction - showed high-dimensional behaviour. We generally found that clinical data were easier to compress than lab data. Our results help to explain the success of the FI as a simple dimensionality reduction technique for binary health data. We demonstrate how PCA extends the FI, providing additional health information, and allows us to explore system dimensionality and complexity. PCA is a promising tool for determining and exploring collective health features from collections of binarized biomarkers.
Collapse
|
12
|
Sapp DG, Cormier BM, Rockwood K, Howlett SE, Heinze SS. The frailty index based on laboratory test data as a tool to investigate the impact of frailty on health outcomes: a systematic review and meta-analysis. Age Ageing 2023; 52:afac309. [PMID: 36626319 PMCID: PMC9831271 DOI: 10.1093/ageing/afac309] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Indexed: 01/11/2023] Open
Abstract
The frailty index (FI) quantifies frailty as deficit accumulation. It has been adapted to employ laboratory test data (FI-Lab). Our objective was to systematically review and meta-analyse the FI-Lab's ability to predict mortality. Secondary objectives were to review the FI-Lab's association with adverse health outcomes and whether FI-Lab scores differed between the sexes. A systematic literature search was carried out using six online databases to identify studies that measured the FI-Lab in humans. Hazard ratios (HRs) were combined in a meta-analysis to create a pooled risk estimate for mortality. Of the 1,201 papers identified, spanning January 2010 until 11 July 2022, 38 were included. FI-Lab scores per 0.01 unit increase predicted mortality overall (HR = 1.04; 95% confidence interval (CI) = 1.03-1.05) and for studies with a mean age of 81+ years (HR = 1.04; 95% CI = 1.03-1.05). The quality of evidence for these meta-analyses are moderate and high, respectively. Further, higher FI-Lab scores were associated with more frequent adverse health outcomes. Sex differences in FI-Lab scores varied, with no consistent indication of a sex effect. The FI-Lab is associated with mortality and with a variety of adverse health outcomes. No consistent sex differences in FI-Lab scores were observed, with several studies in disagreement. Notably, these conclusions were most relevant to older (65+ years old) individuals; further evidence in younger people is needed in both clinical and population representative studies.
Collapse
Affiliation(s)
- David G Sapp
- Department of Pathology, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
| | - Brianna M Cormier
- Department of Pharmacology, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
| | - Kenneth Rockwood
- Department of Medicine (Geriatric Medicine), Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
| | - Susan E Howlett
- Department of Pharmacology, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
- Department of Medicine (Geriatric Medicine), Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
| | - Stefan S Heinze
- Department of Pharmacology, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
| |
Collapse
|
13
|
Association between the frailty index and vascular brain damage: The Treviso Dementia (TREDEM) registry. Exp Gerontol 2022; 167:111894. [PMID: 35843350 DOI: 10.1016/j.exger.2022.111894] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Revised: 07/10/2022] [Accepted: 07/11/2022] [Indexed: 11/21/2022]
Abstract
PURPOSE An association between frailty and vascular brain damage (VBD) has been described in older adults. However, most studies have identified frailty according to the phenotypic model. It is less clear whether frailty, operationalized as an accumulation of health deficits, is associated with the presence and severity of VBD. The present study was therefore undertaken to verify whether a 50-item frailty index (FI) is related to VBD in a large and relatively unselected cohort of attendees of a memory clinic. MATERIALS AND METHODS The TREDEM (Treviso Dementia) registry includes retrospective observational data of 1584 participants. A modified FI was calculated from 50 variables comprising diseases, disability, behavioral disorders, and blood biochemistry. The presence and severity of VBD, including leukoaraiosis, lacunes, larger infarctions and the hierarchical vascular rating scale (HVRS), were determined based on brain computerized tomography imaging. Multiple logistic regression models were built according to the stepwise method. RESULTS Mean age of the 1584 participants was 79.6 ± 7.5 years and 1033 (65.2 %) were females. The average number of health deficits was 11.6 ± 6.2, corresponding to an FI of 0.23 ± 0.12 (range: 0.00-0.56). Each 0.01-point increase in the FI was associated with an increased probability of leukoaraiosis (+2.3 %) and severe leukoaraiosis (+5 %), lacunas in the basal ganglia (+1.73 %), occipital lobes (+2.7 %), parietal lobes (+3 %), frontal lobes (+3.6 %), temporal lobes (+4.2 %), and thalamus (+4.4 %). Moreover, an increase of 0.01 points in the FI was associated with a 3.1 % increase in the probability of HVRS score (≥2). CONCLUSION An FI based on routine clinical and laboratory variables was associated with the presence, degree, and some localizations of VBD in a population of older adults with cognitive decline. This frailty assessment tool may therefore be used to identify individuals at risk of developing cerebrovascular disease and, consequently, to implement strategies for vascular risk factor control.
Collapse
|