ArticleSensors (Basel, Switzerland)2019
Optimization and Validation of an Adjustable Activity Classification Algorithm for Assessment of Physical Behavior in Elderly.
Article in Sensors (Basel, Switzerland), 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT05931068 (Pre- and Postoperative Energy Expenditure in Major Liver Resection), which is not on this map. Cited by 18 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Pre- and Postoperative Energy Expenditure in Major Liver Resection: What do we Ask From a Patient?
Who cites it
18 citing papers in PubMed.
- A randomized crossover study of functional electrical stimulation during walking in spastic cerebral palsy: the FES on participation (FESPa) trial.BMC pediatrics · 2022Trial
- Activity profiles and their correlates in patients with localised renal and colorectal cancer shortly after treatment: a cross-sectional analysis.Journal of cancer survivorship : research and practice · 2026Article
- Associations between fatigue, physical fitness, and physical activity in patients with inflammatory bowel disease.Crohn's & colitis 360 · 2026Article
- Physical Activity and Fear Avoidance Over Time in Patients With Acute/Subacute Versus Chronic Unilateral Vestibulopathy: A Prospective Study.Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology · 2026Article
- An empirical study of 15-minute fitness circles and the health of Chinese older adults-based on the mediating effect of physical activity.International journal for equity in health · 2025Article
- Physical Activity Levels of Community-Dwelling Older Adults During Daily Life Activities: A Descriptive Study.Healthcare (Basel, Switzerland) · 2024Article
- Physical Activity and Frailty Are Impaired in Older Adults with Benign Paroxysmal Positional Vertigo.Journal of clinical medicine · 2024Article
- Longitudinal associations of diurnal rest-activity rhythms with fatigue, insomnia, and health-related quality of life in survivors of colorectal cancer up to 5 years post-treatment.The international journal of behavioral nutrition and physical activity · 2024Article
- The "Can Do, Do Do" Framework Applied to Assess the Association between Physical Capacity, Physical Activity and Prospective Falls, Subsequent Fractures, and Mortality in Patients Visiting the Fracture Liaison Service.Journal of personalized medicine · 2024Article
- The DizzyQuest Combined with Accelerometry: Daily Physical Activities and Limitations among Patients with Bilateral Vestibulopathy Due to DFNA9.Journal of clinical medicine · 2024Article
- Prediction of Physical Activity Patterns in Older Patients Rehabilitating After Hip Fracture Surgery: Exploratory Study.JMIR rehabilitation and assistive technologies · 2023Article
- Physical Functioning in Patients with a Recent Fracture: The "Can Do, Do Do" Framework Applied to Explore Physical Capacity, Physical Activity and Fall Risk Factors.Calcified tissue international · 2023Article
- Wearable Motion Sensors in Older Adults: On the Cutting Edge of Health and Mobility Research.Sensors (Basel, Switzerland) · 2022Article
- Optimization and Validation of a Classification Algorithm for Assessment of Physical Activity in Hospitalized Patients.Sensors (Basel, Switzerland) · 2021Article
- Daily Life Benefits and Usage Characteristics of Dynamic Arm Supports in Subjects with Neuromuscular Disorders.Sensors (Basel, Switzerland) · 2020Observational
- Smartphone App with an Accelerometer Enhances Patients' Physical Activity Following Elective Orthopedic Surgery: A Pilot Study.Sensors (Basel, Switzerland) · 2020Article
- The Role of Bedroom Privacy in Social Interaction among Elderly Residents in Nursing Homes: An Exploratory Case Study of Hong Kong.Sensors (Basel, Switzerland) · 2020Article
- The Validation of a Pocket Worn Activity Tracker for Step Count and Physical Behavior in Older Adults during Simulated Activities of Daily Living.Gerontology & geriatric medicineArticle
Corrections and comments
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Authors and funding
5 authors.
Funding
Abstract
Due to a lack of transparency in both algorithm and validation methodology, it is difficult for researchers and clinicians to select the appropriate tracker for their application. The aim of this work is to transparently present an adjustable physical activity classification algorithm that discriminates between dynamic, standing, and sedentary behavior. By means of easily adjustable parameters, the algorithm performance can be optimized for applications using different target populations and locations for tracker wear. Concerning an elderly target population with a tracker worn on the upper leg, the algorithm is optimized and validated under simulated free-living conditions. The fixed activity protocol (FAP) is performed by 20 participants; the simulated free-living protocol (SFP) involves another 20. Data segmentation window size and amount of physical activity threshold are optimized. The sensor orientation threshold does not vary. The validation of the algorithm is performed on 10 participants who perform the FAP and on 10 participants who perform the SFP. Percentage error (PE) and absolute percentage error (APE) are used to assess the algorithm performance. Standing and sedentary behavior are classified within acceptable limits (±10% error) both under fixed and simulated free-living conditions. Dynamic behavior is within acceptable limits under fixed conditions but has some limitations under simulated free-living conditions. We propose that this approach should be adopted by developers of activity trackers to facilitate the activity tracker selection process for researchers and clinicians. Furthermore, we are convinced that the adjustable algorithm potentially could contribute to the fast realization of new applications.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.