Orthostatic Tremor Severity and Disability Scale (OT-10)

Orthostatic Tremor Severity and Disability Scale

Acronym: OT-10

Authors: Aristide Merola, MD, PhD; Diego R. Torres-Russotto, MD; Glenn T. Stebbins, PhD; Joaquin A. Vizcarra, MD; Aparna Wagle Shukla, MD; Anhar Hassan, MBBCh, FRACP; Luca Marsili, MD, PhD; Joachim K. Krauss, MD; Rodger J. Elble, MD, PhD; Günther Deuschl, MD, PhD; and Alberto J. Espay, MD, MSc

The Orthostatic Tremor Severity and Disability Scale is a self-administered 10-item scale developed to evaluate the severity and disability of orthostatic tremor in both a clinical and research setting. Its development required patient focus groups, multiple rounds of Delphi panels and cognitive interviews to capture the full spectrum of manifestations relevant to OT patients. It is valid and reliable for capturing orthostatic tremor-related severity and disability. The scale has been evaluated for content validity, internal consistency, measurement error and reliability, construct validity and concurrent validity. The scale assesses the patient’s perception of OT-related symptoms over a 1-week period. Each item is ranked on a scale of 0 (no disability/severity) to 5 (maximal disability/severity), with a maximum score of 50. Higher scores correspond to greater disability. 

Original Publication │ View the Scale (PDF)

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Year Published: 2020

Scale Last Updated: No updates since publication

Assessment Type: Patient-Reported Outcome (PRO)

Estimated Time to Administer the Scale: 5 minutes

Available Translations: None

Additional Scale Publications: None