Cited by 77Context-Aware Activity Recognition SystemsStroke Rehabilitation and RecoveryPhysical Activity and Health

Improving activity recognition using a wearable barometric pressure sensor in mobility-impaired stroke patients

Open access
Massé, Fabien, Gonzenbach, Roman R., Arami, Arash, Paraschiv-Ionescu, Anisoara, Luft, Andreas R., Aminian, Kamiar·2015·Journal of NeuroEngineering and Rehabilitation

Abstract

BACKGROUND: Stroke survivors often suffer from mobility deficits. Current clinical evaluation methods, including questionnaires and motor function tests, cannot provide an objective measure of the patients' mobility in daily life. Physical activity performance in daily-life can be assessed using unobtrusive monitoring, for example with a single sensor module fixed on the trunk. Existing approaches based on inertial sensors have limited performance, particularly in detecting transitions between different activities and postures, due to the inherent inter-patient variability of kinematic patterns. To overcome these limitations, one possibility is to use additional information from a barometric pressure (BP) sensor. METHODS: Our study aims at integrating BP and inertial sensor data into an activity classifier in order to improve the activity (sitting, standing, walking, lying) recognition and the corresponding body elevation (during climbing stairs or when taking an elevator). Taking into account the trunk elevation changes during postural transitions (sit-to-stand, stand-to-sit), we devised an event-driven activity classifier based on fuzzy-logic. Data were acquired from 12 stroke patients with impaired mobility, using a trunk-worn inertial and BP sensor. Events, including walking and lying periods and potential postural transitions, were first extracted. These events were then fed into a double-stage hierarchical Fuzzy Inference System (H-FIS). The first stage processed the events to infer activities and the second stage improved activity recognition by applying behavioral constraints. Finally, the body elevation was estimated using a pattern-enhancing algorithm applied on BP. The patients were videotaped for reference. The performance of the algorithm was estimated using the Correct Classification Rate (CCR) and F-score. The BP-based classification approach was benchmarked against a previously-published fuzzy-logic classifier (FIS-IMU) and a conventional epoch-based classifier (EPOCH). RESULTS: The algorithm performance for posture/activity detection, in terms of CCR was 90.4 %, with 3.3 % and 5.6 % improvements against FIS-IMU and EPOCH, respectively. The proposed classifier essentially benefits from a better recognition of standing activity (70.3 % versus 61.5 % [FIS-IMU] and 42.5 % [EPOCH]) with 98.2 % CCR for body elevation estimation. CONCLUSION: The monitoring and recognition of daily activities in mobility-impaired stoke patients can be significantly improved using a trunk-fixed sensor that integrates BP, inertial sensors, and an event-based activity classifier.

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  • In study [48], the Hierarchical Fuzzy Inference System achieved 70.3% accuracy.

    “70.3%”

    From Wearable sensors and machine learning in post-stroke rehabilitation assessment: A systematic review (2022) · cites this paper as [48]

    The Results (Overall performance, Table 6; page not available) report a 90.4% correct classification rate for H-FIS activity recognition, not 70.3%. Table 7 reports 98.2% for classification of activity levels. A search for 70.3% found no matching result in our copy. (LLM, conf=0.88)

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  • In activity recognition, researchers also covered kitchen tasks and routine activities such as making a drink, chopping food, making the bed, reading, lacing shoes, folding, sweeping, and brushing teeth.

    “performing kitchen tasks like making a drink, chopping food [42] and other routine activities like making the bed, reading and lacing shoes [48], folding, sweeping and brushing teeth [46,48,49].”

    From Wearable sensors and machine learning in post-stroke rehabilitation assessment: A systematic review (2022) · cites this paper as [48]

    The Data collection section (page unavailable) lists reading the newspaper and shoe lacing, and also pouring and drinking water. It does not list making the bed, folding, sweeping, or brushing teeth. In the citing sentence, the kitchen-task citation is [42], so those tasks need not be supported by this source. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Designing efficient ML-based assessment systems that generalise to new users requires a large number of participants with different and variant degrees of severity.

    “In addition, in order to design efficient ML-based assessment systems that generalises to new users a large number of participants should take part with different and variant degrees of severity [43,48,49,69,70], which is not always available and taken into account.”

    From Wearable sensors and machine learning in post-stroke rehabilitation assessment: A systematic review (2022) · cites this paper as [48]

    The Discussion identifies the small sample as a limitation and proposes validation with more stroke patients. It also discusses the risk that machine-learning activity classifiers may not perform similarly in real-life settings. It does not say that participants spanning different degrees of severity are required for generalisation to new users. (LLM, conf=0.84)

    Experimental — accuracy not yet measured

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Research works printed but not linked: 1

  1. [37]Labatut V, Cherifi H. Accuracy measures for the comparison of classifiers, presented at the The 5th International Conference on Information Technology, Amman, Jordanie. 2012.

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Authors
Massé, F., Gonzenbach, R. R., Arami, A., Paraschiv-Ionescu, A., Luft, A. R., & Aminian, K.
Affiliations
  • École Polytechnique Fédérale de Lausanne (CH)
  • University Hospital Zurich (CH)
Corresponding author
Aminian, Kamiar
Venue
Journal of NeuroEngineering and Rehabilitation
Published
2015-08-25
Volume
12
Issue
1
Pages
72-72
ISSN
1743-0003 (ISSN-L)
OpenAlex
W1911839968
Cited by
77
References
48
Citations by year
2026: 2 · 2025: 5 · 2024: 4 · 2023: 10 · 2022: 12 · 2021: 4 · 2020: 14 · 2019: 7 · 2018: 9 · 2017: 3 · 2016: 6 · 2015: 1
FWCI
5.50
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Journal of NeuroEngineering and Rehabilitation (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Zurich Open Repository and Archive (University of Zurich) (acceptedVersion, cc-by)
  • Infoscience (Ecole Polytechnique Fédérale de Lausanne) (submittedVersion)
  • Infoscience (Ecole Polytechnique Fédérale de Lausanne) (submittedVersion, cc-by-nc-nd)
  • Zurich Open Repository and Archive (University of Zurich) (submittedVersion, cc-by)
  • Zurich Open Repository and Archive (University of Zurich)
Funders
European Commission (287713)
Topics
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Context-Aware Activity Recognition Systems
  • Health Sciences › Medicine › Rehabilitation › Stroke Rehabilitation and Recovery
  • Health Sciences › Medicine › Physiology › Physical Activity and Health
Keywords
stroke, activity recognition, barometric pressure sensor, inertial sensors, mobility impairment, postural transitions, fuzzy inference system, non-intrusive monitoring, daily activity monitoring
MeSH terms
Stroke Rehabilitation, Aged, Algorithms, Biomechanical Phenomena, Female, Humans, Locomotion, Male, Middle Aged, Motor Activity, Movement, Posture, Pressure, Reproducibility of Results, Walking, Fuzzy Logic, Monitoring, Ambulatory, Mobility Limitation

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