Swallowing problems in Parkinson's disease: frequency and clinical correlates

Miller, Nick, Allcock, Liesl, Hildreth, Anthony, Jones, Diana, Noble, Emma and Burn, David (2009) Swallowing problems in Parkinson's disease: frequency and clinical correlates. Journal of Neurology, Neurosurgery & Psychiatry, 80 (9). pp. 1047-1049. ISSN 0022-3050

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Abstract

Background
Changes to the efficiency and integrity of swallowing mechanisms are inevitable in Parkinson's disease (PD). It remains unclear how many people with PD are at risk of dysphagia.

Aims
To establish the frequency of impaired swallowing on a bedside screening test in people with PD and the relationship of performance to indicators of disease progression.

Methods
137 individuals with PD from a community and hospital based cohort were asked to drink 150ml of water as quickly as possible whilst in an 'off drug' state. Performance was timed live. Measures of swallow speed and volumes were derived. Outcomes were compared to published norms.

Results
Thirty-one (23%) could not complete the full 150ml. Swallowing rate (ml/sec) fell >-1SD below published norms for 115 (84%) and >-2SD for 44 (32%) subjects. There were moderate correlations between rate of swallow and disease severity (UPDRS, Hoehn and Yahr stage), depression and cognition, but not disease duration. Participants with a postural instability gait disorder (PIGD) phenotype performed significantly poorer. A best fit regression model (multiple R2 0.375) included the variables age, gender, depression, motor phenotype and UPDRS III score. There was poor correspondence between subjective reports of dysphagia and performance on the water swallow test.

Conclusions
Swallowing problems are frequent in PD. Older women and subjects with a PIGD phenotype are more at risk of dysphagia. Self-report of "no difficulty" is not a reliable indicator of swallowing status. Studies employing more objective assessment of aspiration (risk) to compare with water swallow test performance are advocated.

Item Type:	Article
Subjects:	A900 Others in Medicine and Dentistry
Department:	Faculties > Health and Life Sciences > Social Work, Education and Community Wellbeing
Depositing User:	EPrint Services
Date Deposited:	12 Aug 2009 14:20
Last Modified:	10 Oct 2019 23:01
URI:	http://nrl.northumbria.ac.uk/id/eprint/1382

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