Evidence map›Paper›PMID 35861853›Full record

ArticleJournal of neurology2022

Are smartphones and machine learning enough to diagnose tremor?

Arjun Balachandar, Musleh Algarni, Lais Oliveira, Luca Marsili, Aristide Merola, Andrea Sturchio, Alberto J Espay, William D Hutchison, Aniruddh Balasubramaniam, Frank Rudzicz and 1 more

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In one paragraph

Article in Journal of neurology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed, 2 pooled it
4.4field-weighted citation impact, top 4% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

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.

2 · The registry

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.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

18 citing papers in PubMed, 2 syntheses or guidelines pooled it, 35 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Review
  4. Expanding the Clinical Spectrum of Head Snap Sign.Movement disorders clinical practice · 2026
    Article
  5. Machine Learning for Differentiating Essential Tremor: A Scoping Review.Tremor and other hyperkinetic movements (New York, N.Y.) · 2026
    Article
  6. Phenotypical Differentiation of Tremor Using Time Series Feature Extraction and Machine Learning.Movement disorders : official journal of the Movement Disorder Society · 2025
    Article
  7. Article
  8. Review
  9. Subclinical tremor differentiation using long short-term memory networks.Physical and engineering sciences in medicine · 2025
    Article
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  11. Article
  12. Review
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

11 authors at 6 institutions in 3 countries.

Arjun BalachandarDepartment of Medicine, University of Toronto, Toronto, Canada.ORCID http://orcid.org/0000-0002-7658-4749
Musleh AlgarniDivision of Neurology, Edmond J. Safra Program in Parkinson's Disease and Morton and Gloria Shulman Movement Disorders Clinic, Toronto Western Hospital, UHN, University of Toronto, 399 Bathurst St, 7MacL412, Toronto, ON, M5T 2S8, Canada.
Lais OliveiraDivision of Neurology, Edmond J. Safra Program in Parkinson's Disease and Morton and Gloria Shulman Movement Disorders Clinic, Toronto Western Hospital, UHN, University of Toronto, 399 Bathurst St, 7MacL412, Toronto, ON, M5T 2S8, Canada.
Luca MarsiliJames J and Joan A. Gardner Center for Parkinson's Disease and Movement Disorders, University of Cincinnati Medical Center, Cincinnati, OH, USA.
Aristide MerolaDepartment of Neurology, Ohio State University Wexner Medical Center, Columbus, OH, USA.
Andrea SturchioJames J and Joan A. Gardner Center for Parkinson's Disease and Movement Disorders, University of Cincinnati Medical Center, Cincinnati, OH, USA.
Alberto J EspayJames J and Joan A. Gardner Center for Parkinson's Disease and Movement Disorders, University of Cincinnati Medical Center, Cincinnati, OH, USA.
William D HutchisonDepartment of Physiology, University of Toronto, Toronto, ON, Canada.
Aniruddh BalasubramaniamDepartment of Mathematics, Indian Institute of Science, Bangalore, India.
Frank RudziczDepartment of Computer Science, University of Toronto, Toronto, ON, Canada.
Alfonso FasanoDivision of Neurology, Edmond J. Safra Program in Parkinson's Disease and Morton and Gloria Shulman Movement Disorders Clinic, Toronto Western Hospital, UHN, University of Toronto, 399 Bathurst St, 7MacL412, Toronto, ON, M5T 2S8, Canada. alfonso.fasano@uhn.ca.
University of Toronto · CAUniversity of Cincinnati · USIndian Institute of Science Bangalore · INSt. Michael's Hospital · CAThe Ohio State University Wexner Medical Center · USToronto Western Hospital · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundPatients with essential tremor (ET), Parkinson's disease (PD) and dystonic tremor (DT) can be difficult to classify and often share similar characteristics.

objectivesTo use ubiquitous smartphone accelerometers with and without clinical features to automate tremor classification using supervised machine learning, and to use unsupervised learning to evaluate if natural clusterings of patients correspond to assigned clinical diagnoses.

methodsA supervised machine learning classifier was trained to classify 78 tremor patients using leave-one-out cross-validation to estimate performance on unseen accelerometer data. An independent cohort of 27 patients were also studied. Next, we focused on a subset of 48 patients with both smartphone-based tremor measurements and detailed clinical assessment metrics and compared two separate machine learning classifiers trained on these data.

resultsThe classifier yielded a total accuracy of 74.4% and F1-score of 0.74 for a trinary classification with an area under the curve of 0.904, average F1-score of 0.94, specificity of 97% and sensitivity of 84% in classifying PD from ET or DT. The algorithm classified ET from non-ET with 88% accuracy, but only classified DT from non-DT with 29% accuracy. A poorer performance was found in the independent cohort. Classifiers trained on accelerometer and clinical data respectively obtained similar results.

conclusionsMachine learning classifiers achieved a high accuracy of PD, however moderate accuracy of ET, and poor accuracy of DT classification. This underscores the difficulty of using AI to classify some tremors due to lack of specificity in clinical and neuropathological features, reinforcing that they may represent overlapping syndromes.

Indexed as

Essential TremorParkinson DiseaseHumansMachine LearningSmartphoneTremorDystonic tremorEssential tremorMachine learningParkinson’s diseaseSmartphone

Identifiers

PMID35861853
OpenAlexW4286492794

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.