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Lookup NU author(s): Dr James FrithORCiD, Emerita Professor Julia Newton
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Aim: To validate a new patient-reported outcome measure for routine clinical use.Methods: A total of 50 older individuals with orthostatic hypotension who attended a falls and syncope clinic completed three questionnaires, the recently developed Orthostatic Hypotension Questionnaire, the existing Orthostatic Grading Scale and the quality of life measure EQ-5D-5L. Validity of the Orthostatic Hypotension Questionnaire was tested against the aforementioned questionnaires for symptoms and for quality of life. Comorbidity was quantified using the Charlson Comorbidity Index.Results: The cohort of 50 individuals had a median age of 67 years (interquartile range 26-89 years) with a median Charlson Comorbidity Index of 3 (interquartile range 2-5). The total Orthostatic Hypotension Questionnaire Symptom Assessment score correlated strongly with the Orthostatic Grading Scale (0.616, P<0.001) and the Orthostatic Hypotension Questionnaire Daily Activity Scale correlated strongly with daily activity on the EQ-5D-5L (0.61, P<0.001). Using the Orthostatic Grading Scale, individuals' symptoms were categorized as mild, moderate or severe, the Orthostatic Hypotension Questionnaire scores were significantly different between these groups (P<0.001). Internal consistency was high (Cronbach's apha 0.882), and ceiling or floor effects did not limit the total scores.Conclusion: The Orthostatic Hypotension Questionnaire is a valid patient report tool to quantify the symptom burden of people with orthostatic hypotension. Because the symptoms associated with orthostatic hypotension are frequently non-specific, it will be a clinically useful tool to measure and quantify symptom load in people with orthostatic hypotension.
Author(s): Frith J, Newton JL
Publication type: Article
Publication status: Published
Journal: Geriatrics & Gerontology International
Year: 2016
Volume: 16
Issue: 7
Pages: 785-790
Print publication date: 14/07/2016
Online publication date: 14/07/2015
Acceptance date: 14/05/2015
ISSN (print): 1444-1586
ISSN (electronic): 1447-0594
Publisher: Wiley-Blackwell Publishing Ltd.
URL: http://dx.doi.org/10.1111/ggi.12553
DOI: 10.1111/ggi.12553
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