Evidence map›Paper›PMID 28841694›Full record

ArticlePloS one2017

Differential diagnosis between Parkinson's disease and essential tremor using the smartphone's accelerometer.

Sergi Barrantes, Antonio J Sánchez Egea, Hernán A González Rojas, Maria J Martí, Yaroslau Compta, Francesc Valldeoriola, Ester Simo Mezquita, Eduard Tolosa, Josep Valls-Solè

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed
6.3field-weighted citation impact, top 3% 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

34 citing papers in PubMed, 108 citations in OpenAlex.

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  7. A comprehensive guide to digital neurology. An update on current development on digital neurology derived from the Digital Neuro Hub project.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2025
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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

9 authors at 4 institutions in 1 country.

Sergi BarrantesSchool of Medicine, University of Barcelona (UB). Barcelona, Catalonia, Spain.
Antonio J Sánchez EgeaMechanical Engineering Department (EPSEVG). Politechnical University of Catalonia (UPC). Barcelona, Spain.
Hernán A González RojasMechanical Engineering Department (EPSEVG). Politechnical University of Catalonia (UPC). Barcelona, Spain.
Maria J MartíSchool of Medicine, University of Barcelona (UB). Barcelona, Catalonia, Spain.
Yaroslau ComptaSchool of Medicine, University of Barcelona (UB). Barcelona, Catalonia, Spain.
Francesc ValldeoriolaSchool of Medicine, University of Barcelona (UB). Barcelona, Catalonia, Spain.
Ester Simo MezquitaMathematica Department (EPSEVG). Politechnical University of Catalonia (UPC). Barcelona, Spain.
Eduard TolosaSchool of Medicine, University of Barcelona (UB). Barcelona, Catalonia, Spain.
Josep Valls-SolèSchool of Medicine, University of Barcelona (UB). Barcelona, Catalonia, Spain.ORCID http://orcid.org/0000-0001-6779-0156
Biomedical Research Networking Center on Neurodegenerative Diseases · ESUniversitat Politècnica de Catalunya · ESUniversitat de Barcelona · ESHospital Clínic de Barcelona · ES

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe differential diagnosis between patients with essential tremor (ET) and those with Parkinson's disease (PD) whose main manifestation is tremor may be difficult unless using complex neuroimaging techniques such as 123I-FP-CIT SPECT. We considered that using smartphone's accelerometer to stablish a diagnostic test based on time-frequency differences between PD an ET could support the clinical diagnosis.

methodsThe study was carried out in 17 patients with PD, 16 patients with ET, 12 healthy volunteers and 7 patients with tremor of undecided diagnosis (TUD), who were re-evaluated one year after the first visit to reach the definite diagnosis. The smartphone was placed over the hand dorsum to record epochs of 30 s at rest and 30 s during arm stretching. We generated frequency power spectra and calculated receiver operating characteristics curves (ROC) curves of total spectral power, to establish a threshold to separate subjects with and without tremor. In patients with PD and ET, we found that the ROC curve of relative energy was the feature discriminating better between the two groups. This threshold was then used to classify the TUD patients.

resultsWe could correctly classify 49 out of 52 subjects in the category with/without tremor (97.96% sensitivity and 83.3% specificity) and 27 out of 32 patients in the category PD/ET (84.38% discrimination accuracy). Among TUD patients, 2 of 2 PD and 2 of 4 ET were correctly classified, and one patient having PD plus ET was classified as PD.

conclusionsBased on the analysis of smartphone accelerometer recordings, we found several kinematic features in the analysis of tremor that distinguished first between healthy subjects and patients and, ultimately, between PD and ET patients. The proposed method can give immediate results for the clinician to gain valuable information for the diagnosis of tremor. This can be useful in environments where more sophisticated diagnostic techniques are unavailable.

Indexed as

SmartphoneAccelerometryCase-Control StudiesDiagnosis, DifferentialEssential TremorHumansParkinson DiseaseProspective Studies

Identifiers

PMID28841694
PMCPMC5571972
OpenAlexW2747786350

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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.