Evidence map›Paper›PMID 33869758›Full record

ArticleLaryngoscope investigative otolaryngology2021

Classification of vocal tremor using updated consensus-based tremor classification criteria.

Vanessa Torrecillas, Kaitlyn Dwenger, Julie M Barkmeier-Kraemer

Open access · goldAbstract read
In one paragraph

Article in Laryngoscope investigative otolaryngology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
1.3field-weighted citation impact, top 21% 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

13 citing papers in PubMed, 22 citations in OpenAlex.

  1. Sodium Oxybate in Alcohol-Responsive Essential Tremor of Voice: An Open-Label Phase II Study.Movement disorders : official journal of the Movement Disorder Society · 2023
    Trial
  2. Review
  3. Comprehensive description of clinical features of laryngeal dystonia and dystonic vocal tremor.Acta otorhinolaryngologica Italica : organo ufficiale della Societa italiana di otorinolaringologia e chirurgia cervico-facciale · 2026
    Article
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  8. Laryngeal dystonia and vocal tremor response to botulinum toxin injection.European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery · 2025
    Article
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  12. Article
  13. Tremor Syndromes: An Updated Review.Frontiers in neurology · 2021
    Review
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

3 authors at 1 institution in 1 country.

Vanessa TorrecillasDivision of Otolaryngology - Head and Neck Surgery University of Utah Salt Lake City Utah USA.ORCID https://orcid.org/0000-0003-3430-9877
Kaitlyn DwengerDivision of Otolaryngology - Head and Neck Surgery University of Utah Salt Lake City Utah USA.
Julie M Barkmeier-KraemerDivision of Otolaryngology - Head and Neck Surgery University of Utah Salt Lake City Utah USA.ORCID https://orcid.org/0000-0002-5037-3070
University of Utah · US

Funding

Physiologic Correlates of Vocal Tremor affecting those with Essential TremorR01DC016838 · NIDCD · UNIVERSITY OF UTAH · PI BARKMEIER-KRAEMER, JULIE M · 2019 to 2023
$3.0M
NIDCD NIH HHS R01 DC016838
6 · The paper itself

Abstract

objectivesThis study characterized the clinical phenotypes of individuals with vocal tremor (VT) using tremor classification criteria published by the International Parkinson and Movement Disorder Society (IPMDS) including laryngeal features from the American Academy of Otolaryngology-Head and Neck Surgery (AAO-HNS).

methodsVT phenotypic descriptors were extracted from participant medical records from 2017 to 2019. Clinical phenotype descriptors included the: (a) chief complaint and discipline for the first appointment, (b) demographics, (c) tremor body distribution, condition, frequency, and progression, (d) exacerbating/alleviating factors, (e) treatment approaches, and (g) neurologic comorbidities. Descriptive statistics were conducted.

resultsOf 179 meeting inclusion criteria, 2/3 were female; tremor onset affected voice (43%) or extremity (32%) and 2/3 were documented with tremor duration of 3 years or more. Those with primary VT first saw otolaryngology or speech language pathology (59%), whereas those with primary extremity/head tremor first saw neurology (36%). Documentation commonly omitted tremor clinical features such as (a) observed conditions of tremor (64%), (b) laryngeal features (64%), and (c) tremor frequency (92%). Thus, VT classification was based on comorbidity in 49% of patients (ie, essential tremor (48%), dystonia (72%), and Parkinson's disease (100%)) and 32% had inadequate documentation to classify.

conclusionThe majority of individuals with VT were unable to be classified based on documented clinical features highlighting the need for consistent multidisciplinary assessment of tremor affecting speech structures. The primary site of tremor determined the first discipline seen. Most commonly classified VT categories included essential tremor (47%), dystonia (28%), Parkinsonism (7%), and isolated VT (19%). LEVEL OF EVIDENCE: 4.

Indexed as

essential tremorlaryngeal dystoniaParkinson's diseasevocal tremorvoice tremor

Identifiers

PMID33869758
PMCPMC8035951
OpenAlexW3134064843

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.