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Background: Aortic stenosis (AS) is the most common acquired valvar disease and is associated with increased risk for frailty. Frailty as a geriatric syndrome is associated with muscle weakness and a compromised autonomic nervous system…

Quantitative Methods · Quantitative Biology 2024-04-25 Patricio Arrué , Kaveh Laksari , Nancy Sweitzer , Mindy Fain , Nima Toosizadeh

Frailty and functional decline strongly influence treatment tolerance and outcomes in older patients with cancer, yet assessment is typically limited to infrequent clinic visits. We propose a multimodal wearable framework to estimate…

To better understand mortality change with age capturing the variability in individuals' rates of aging, we performed comprehensive analysis of statistical properties of a cumulative index of age-associated disorders (deficits), called a…

Populations and Evolution · Quantitative Biology 2007-05-23 A. Kulminski , A. Yashin , I. Akushevich , S. Ukraintseva , K. Land , K. Arbeev , K. Manton

Background: Frailty, a state of increased vulnerability to adverse health outcomes, has garnered significant attention in research and clinical practice. Existing constructs aggregate clinical features or health deficits into a single…

Applications · Statistics 2024-03-04 Lara Johnson , Bruce Guthrie , Paul A T Kelly , Atul Anand , Alan Marshall , Sohan Seth

Cardiovascular diseases are best diagnosed using multiple modalities that assess both the heart's electrical and mechanical functions. While effective, imaging techniques like echocardiography and nuclear imaging are costly and not widely…

Medical Physics · Physics 2024-10-28 Sajjad Karimi , Shirin Karimi , Amit J. Shah , Gari D. Clifford , Reza Sameni

We predict the Fried physical frailty phenotype health deficits (FPFP5: slow gait, weakness, weight loss, low activity, and exhaustion) using two measures of frailty: frailty index (FI) or frailty phenotype (FP). The FP theorizes that the…

Quantitative Methods · Quantitative Biology 2025-01-07 Glen Pridham , Kenneth Rockwood , Andrew Rutenberg

The overarching goal of the present work is to contribute to the understanding of the relations between fetal heart rate (FHR) temporal dynamics and the well-being of the fetus, notably in terms of predicting cardiovascular decompensation…

Medical Physics · Physics 2021-10-19 Stéphane G. Roux , Nicolas B. Garnier , Patrice Abry , Nathan Gold , Martin G. Frasch

Identifying frail older adults in an ageing population is essential for improving healthcare services. This study proposes a composite indicator to assess individual frailty levels using administrative healthcare data. Given the complex and…

Methodology · Statistics 2025-10-07 Sara Rebottini , Pietro Belloni

Frailty is a common and critical condition in elderly adults, which may lead to further deterioration of health. However, difficulties and complexities exist in traditional frailty assessments based on activity-related questionnaires. These…

Computer Vision and Pattern Recognition · Computer Science 2021-10-18 Muhammad Zeeshan Arshad , Dawoon Jung , Mina Park , Hyungeun Shin , Jinwook Kim , Kyung-Ryoul Mun

Objective: We aimed to determine the relationship between day-to-day sleep efficiency variability and cognitive function among older adults using accelerometer data and three cognitive tests. Methods: Older adults aged 65+ with 5 days of…

Applications · Statistics 2023-11-07 Collin Sakal , Tingyou Li , Juan Li , Xinyue Li

To explore the mechanistic relationships between ageing, frailty and mortality, we developed a computational model in which possible health attributes are represented by the nodes of a complex network. Each node can be either damaged (i.e.…

Populations and Evolution · Quantitative Biology 2017-06-30 Andrew D. Rutenberg , Arnold B. Mitnitski , Spencer Farrell , Kenneth Rockwood

Physical activity during hip fracture rehabilitation is essential for mitigating long-term functional decline in geriatric patients. However, it is rarely quantified in clinical practice. Existing continuous monitoring systems with…

Computer Vision and Pattern Recognition · Computer Science 2026-02-09 Shuhao Que , Dieuwke van Dartel , Ilse Heeringa , Han Hegeman , Miriam Vollenbroek-Hutten , Ying Wang

This study addresses the challenge of predicting post-stroke rigidity by emphasizing feature interactions through graph-based explainable AI. Post-stroke rigidity, characterized by increased muscle tone and stiffness, significantly affects…

Heart failure (HF) affects 11.8% of adults aged 65 and older, reducing quality of life and longevity. Preventing HF can reduce morbidity and mortality. We hypothesized that artificial intelligence (AI) applied to 24-hour single-lead…

Signal Processing · Electrical Eng. & Systems 2026-01-05 Eran Zvuloni , Ronit Almog , Michael Glikson , Shany Brimer Biton , Ilan Green , Izhar Laufer , Offer Amir , Joachim A. Behar

The growing global elderly population is expected to increase the prevalence of frailty, posing significant challenges to healthcare systems. Frailty, a syndrome associated with ageing, is characterised by progressive health decline,…

Machine Learning · Computer Science 2023-10-02 Eugenio Lomurno , Simone Toffoli , Davide Di Febbo , Matteo Matteucci , Francesca Lunardini , Simona Ferrante

In many countries life expectancy gains have been substantially higher than predicted by even recent forecasts. This is primarily due to increasing rates of improvement in old-age mortality not captured by existing models. In this paper we…

Methodology · Statistics 2021-09-07 Søren Fiig Jarner

The fractality of human gait, namely, the long-range correlation that characterizes scale-free fluctuations of gait descriptors, such as the stride intervals during steady-state walking, depends on the well-tuned organization of the…

Adaptation and Self-Organizing Systems · Physics 2021-09-07 Chunjiang Fu , Yasuyuki Suzuki , Pietro Morasso , Taishin Nomura

In this work we study the characteristics of the heart rate variability (HRV) as a function of age and gender. The analyzed data include previous results reported in the literature. The data obtained in this work expand the range of age…

Quantitative Methods · Quantitative Biology 2018-10-11 Isabel M. Irurzun , Magdalena M. Defeo , L. Garavaglia , Thomas Mailland , E. E. Mola

Frailty is a condition in aging medicine characterized by diminished physiological reserve and increased vulnerability to stressors. However, frailty assessment remains subjective, heterogeneous, and difficult to scale in clinical practice.…

Computer Vision and Pattern Recognition · Computer Science 2026-04-21 Laura McDaniel , Basudha Pal , Crystal Szczesny , Yuxiang Guo , Zhaoyang Wang , Ryan Roemmich , Peter Abadir , Rama Chellappa

Background: The relative contribution of different aging-associated processes to the age phenotype may differ among individuals, creating variability in aging manifestations among age-peers. Capturing this variability can significantly…

Populations and Evolution · Quantitative Biology 2007-05-23 A. Kulminski , A. Yashin , S. Ukraintseva , I. Akushevich , K. Arbeev , K. Land , K. Manton
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