Reliability of a new scale for essential tremor

Rodger Elble; Cynthia Comella; Stanley Fahn; Mark Hallett; Joseph Jankovic; Jorge L. Juncos; Peter Lewitt; Kelly Lyons; William Ondo; Rajesh Pahwa; Kapil Sethi; Natividad Stover; Daniel Tarsy; Claudia Testa; Ron Tintner; Ray Watts; Theresa Zesiewicz

doi:10.1002/mds.25162

Reliability of a new scale for essential tremor

Rodger Elble, Cynthia Comella, Stanley Fahn, Mark Hallett, Joseph Jankovic, Jorge L. Juncos, Peter Lewitt, Kelly Lyons, William Ondo, Rajesh Pahwa, Kapil Sethi, Natividad Stover, Daniel Tarsy, Claudia Testa, Ron Tintner, Ray Watts, Theresa Zesiewicz

Neurology

Research output: Contribution to journal › Article › peer-review

159 Scopus citations

Abstract

Background: The objective of this study was to determine the reliability of a new scale for the clinical assessment of essential tremor. The Essential Tremor Rating Assessment Scale contains 9 performance items that rate action tremor in the head, face, voice, limbs, and trunk from 0 to 4 in half-point intervals. Head and limb tremor ratings are defined by specific amplitude ranges in centimeters. Methods: Videos of 44 patients and 6 controls were rated by 10 specialists on 2 occasions 1-2 months apart. Inter- and intrarater reliability was assessed with a 2-way random-effects intraclass correlation, using an absolute agreement definition. Results: Inter- and intrarater intraclass correlations for head and upper-limb tremor ranged from 0.86 to 0.96, and intraclass correlations for total score were 0.94 and 0.96. The intraclass correlations for voice, face, trunk, and leg were less robust. Conclusions: This scale is an exceptionally reliable tool for the clinical assessment of essential tremor.

Original language	English (US)
Pages (from-to)	1567-1569
Number of pages	3
Journal	Movement Disorders
Volume	27
Issue number	12
DOIs	https://doi.org/10.1002/mds.25162
State	Published - Oct 2012

Keywords

Essential tremor
Rating scale
Reliability

ASJC Scopus subject areas

Neurology
Clinical Neurology

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10.1002/mds.25162

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title = "Reliability of a new scale for essential tremor",

abstract = "Background: The objective of this study was to determine the reliability of a new scale for the clinical assessment of essential tremor. The Essential Tremor Rating Assessment Scale contains 9 performance items that rate action tremor in the head, face, voice, limbs, and trunk from 0 to 4 in half-point intervals. Head and limb tremor ratings are defined by specific amplitude ranges in centimeters. Methods: Videos of 44 patients and 6 controls were rated by 10 specialists on 2 occasions 1-2 months apart. Inter- and intrarater reliability was assessed with a 2-way random-effects intraclass correlation, using an absolute agreement definition. Results: Inter- and intrarater intraclass correlations for head and upper-limb tremor ranged from 0.86 to 0.96, and intraclass correlations for total score were 0.94 and 0.96. The intraclass correlations for voice, face, trunk, and leg were less robust. Conclusions: This scale is an exceptionally reliable tool for the clinical assessment of essential tremor.",

keywords = "Essential tremor, Rating scale, Reliability",

author = "Rodger Elble and Cynthia Comella and Stanley Fahn and Mark Hallett and Joseph Jankovic and Juncos, {Jorge L.} and Peter Lewitt and Kelly Lyons and William Ondo and Rajesh Pahwa and Kapil Sethi and Natividad Stover and Daniel Tarsy and Claudia Testa and Ron Tintner and Ray Watts and Theresa Zesiewicz",

year = "2012",

month = oct,

doi = "10.1002/mds.25162",

language = "English (US)",

volume = "27",

pages = "1567--1569",

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AU - Elble, Rodger

AU - Comella, Cynthia

AU - Fahn, Stanley

AU - Hallett, Mark

AU - Jankovic, Joseph

AU - Juncos, Jorge L.

AU - Lewitt, Peter

AU - Lyons, Kelly

AU - Ondo, William

AU - Pahwa, Rajesh

AU - Sethi, Kapil

AU - Stover, Natividad

AU - Tarsy, Daniel

AU - Testa, Claudia

AU - Tintner, Ron

AU - Watts, Ray

AU - Zesiewicz, Theresa

PY - 2012/10

Y1 - 2012/10

N2 - Background: The objective of this study was to determine the reliability of a new scale for the clinical assessment of essential tremor. The Essential Tremor Rating Assessment Scale contains 9 performance items that rate action tremor in the head, face, voice, limbs, and trunk from 0 to 4 in half-point intervals. Head and limb tremor ratings are defined by specific amplitude ranges in centimeters. Methods: Videos of 44 patients and 6 controls were rated by 10 specialists on 2 occasions 1-2 months apart. Inter- and intrarater reliability was assessed with a 2-way random-effects intraclass correlation, using an absolute agreement definition. Results: Inter- and intrarater intraclass correlations for head and upper-limb tremor ranged from 0.86 to 0.96, and intraclass correlations for total score were 0.94 and 0.96. The intraclass correlations for voice, face, trunk, and leg were less robust. Conclusions: This scale is an exceptionally reliable tool for the clinical assessment of essential tremor.

AB - Background: The objective of this study was to determine the reliability of a new scale for the clinical assessment of essential tremor. The Essential Tremor Rating Assessment Scale contains 9 performance items that rate action tremor in the head, face, voice, limbs, and trunk from 0 to 4 in half-point intervals. Head and limb tremor ratings are defined by specific amplitude ranges in centimeters. Methods: Videos of 44 patients and 6 controls were rated by 10 specialists on 2 occasions 1-2 months apart. Inter- and intrarater reliability was assessed with a 2-way random-effects intraclass correlation, using an absolute agreement definition. Results: Inter- and intrarater intraclass correlations for head and upper-limb tremor ranged from 0.86 to 0.96, and intraclass correlations for total score were 0.94 and 0.96. The intraclass correlations for voice, face, trunk, and leg were less robust. Conclusions: This scale is an exceptionally reliable tool for the clinical assessment of essential tremor.

KW - Essential tremor

KW - Rating scale

KW - Reliability

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Reliability of a new scale for essential tremor

Abstract

Keywords

ASJC Scopus subject areas

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