{"title":"Dysrhythmia as a prominent feature of Parkinson's disease: An app-based tapping test","authors":"","doi":"10.1016/j.jns.2024.123144","DOIUrl":null,"url":null,"abstract":"<div><h3>Introduction</h3><p>Smartphone applications (apps) are instruments that assist with objective measurements during the clinical assessment of patients with movement disorders. We aim to test the hypothesis that Parkinson's disease (PD) patients will exhibit an increase in tapping variability and a decrease in tapping speed over a one-year period, compared to healthy controls (HC).</p></div><div><h3>Methods</h3><p>Data was prospectively collected from participants enrolled in our Cincinnati Cohort Biomarker Program, in 2021–2023. Participants diagnosed with PD and age-matched HC were examined over a one-year-interval with a tapping test performed with customized smartphone app. Tapping speed (taps/s), inter-tap intervals and variability (movement regularity), and sequence effect were measured.</p></div><div><h3>Results</h3><p>We included 295 PD patients and 62 HC. At baseline, PD subjects showed higher inter-tap variability than HC (coefficient-of-variation-CV, 37 ms [22–64] vs 26 ms [8–51]) (<em>p</em> = 0.007). Conversely, there was no difference in inter-tap intervals (411 ms [199–593] in PD versus 478 ms [243–618] in HC) and tapping speed (3.42[2.70–4.76] taps/s in PD versus 3.21 taps/s [2.57–4.54] in HC) (<em>p</em> > 0.05). Only PD subjects (<em>n</em> = 135), at the one-year follow-up, showed a decreased tapping speed vs baseline (3.44 taps/s [2.86–4.81] versus 3.39 taps/s [2.58,4.30]) (<em>p</em> = 0.036), without significant changes in inter-tap variability (CV, 32 ms [18,55] baseline versus 34 ms [22,59] follow-up) (<em>p</em> = 0.142). No changes were found in HC at the one-year follow up (all <em>p</em> values>0.05).</p></div><div><h3>Conclusions</h3><p>Inter-tap variability (dysrhythmia) but no inter-tap intervals or tapping speed are reliably distinctive feature of an app-based bradykinesia assessment in PD.</p></div>","PeriodicalId":17417,"journal":{"name":"Journal of the Neurological Sciences","volume":null,"pages":null},"PeriodicalIF":3.6000,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0022510X2400279X/pdfft?md5=470e029f72ca594ee1c22262ae218223&pid=1-s2.0-S0022510X2400279X-main.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of the Neurological Sciences","FirstCategoryId":"3","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022510X2400279X","RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CLINICAL NEUROLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Introduction
Smartphone applications (apps) are instruments that assist with objective measurements during the clinical assessment of patients with movement disorders. We aim to test the hypothesis that Parkinson's disease (PD) patients will exhibit an increase in tapping variability and a decrease in tapping speed over a one-year period, compared to healthy controls (HC).
Methods
Data was prospectively collected from participants enrolled in our Cincinnati Cohort Biomarker Program, in 2021–2023. Participants diagnosed with PD and age-matched HC were examined over a one-year-interval with a tapping test performed with customized smartphone app. Tapping speed (taps/s), inter-tap intervals and variability (movement regularity), and sequence effect were measured.
Results
We included 295 PD patients and 62 HC. At baseline, PD subjects showed higher inter-tap variability than HC (coefficient-of-variation-CV, 37 ms [22–64] vs 26 ms [8–51]) (p = 0.007). Conversely, there was no difference in inter-tap intervals (411 ms [199–593] in PD versus 478 ms [243–618] in HC) and tapping speed (3.42[2.70–4.76] taps/s in PD versus 3.21 taps/s [2.57–4.54] in HC) (p > 0.05). Only PD subjects (n = 135), at the one-year follow-up, showed a decreased tapping speed vs baseline (3.44 taps/s [2.86–4.81] versus 3.39 taps/s [2.58,4.30]) (p = 0.036), without significant changes in inter-tap variability (CV, 32 ms [18,55] baseline versus 34 ms [22,59] follow-up) (p = 0.142). No changes were found in HC at the one-year follow up (all p values>0.05).
Conclusions
Inter-tap variability (dysrhythmia) but no inter-tap intervals or tapping speed are reliably distinctive feature of an app-based bradykinesia assessment in PD.
期刊介绍:
The Journal of the Neurological Sciences provides a medium for the prompt publication of original articles in neurology and neuroscience from around the world. JNS places special emphasis on articles that: 1) provide guidance to clinicians around the world (Best Practices, Global Neurology); 2) report cutting-edge science related to neurology (Basic and Translational Sciences); 3) educate readers about relevant and practical clinical outcomes in neurology (Outcomes Research); and 4) summarize or editorialize the current state of the literature (Reviews, Commentaries, and Editorials).
JNS accepts most types of manuscripts for consideration including original research papers, short communications, reviews, book reviews, letters to the Editor, opinions and editorials. Topics considered will be from neurology-related fields that are of interest to practicing physicians around the world. Examples include neuromuscular diseases, demyelination, atrophies, dementia, neoplasms, infections, epilepsies, disturbances of consciousness, stroke and cerebral circulation, growth and development, plasticity and intermediary metabolism.