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Journal of Neurology, Neurosurgery, and Psychiatry 2006;77:317-321; doi:10.1136/jnnp.2005.065417
Copyright © 2006 by the BMJ Publishing Group Ltd.

PAPER

Relationship between impulsive sensation seeking traits, smoking, alcohol and caffeine intake, and Parkinson’s disease

A H Evans1, A D Lawrence2, J Potts2, L MacGregor3, R Katzenschlager1, K Shaw1, J Zijlmans4, A J Lees1

1 Reta Lila Weston Institute of Neurological Studies and the National Hospital for Neurology and Neurosurgery, London, UK
2 MRC Cognition and Brain Sciences Unit, Cambridge, UK
3 Clinical Epidemiology and Health Service Evaluation Unit, Royal Melbourne Hospital, Victoria, Australia
4 Department of Neurology, Vrije Universiteit Medisch Centrum, Amsterdam, the Netherlands

Correspondence to:
Correspondence to:
Professor A J Lees
Reta Lila Weston Institute of Neurological Studies, Windeyer Building, 46 Cleveland Street, London W1T 4JF, UK; alees{at}ion.ucl.ac.uk

Background: An inverse relation exists between smoking and coffee intake and Parkinson’s disease (PD). The present study explored whether this is explained by low sensation seeking, a personality trait believed to characterise PD.

Methods: A total of 106 non-demented patients with PD and 106 age and sex matched healthy controls completed a short version of Zuckerman’s Sensation Seeking Scale (SSS), the Geriatric Depression Scale, and the Trait Anxiety Inventory. Data were collected on past and current cigarette smoking, and participants also completed food frequency questionnaires to estimate current caffeine and alcohol intake.

Results: Patients with PD had lower sensation seeking and higher depression and anxiety scores. They were also less likely to have ever smoked, and had lower caffeine and alcohol intakes. Analysis of the data using conditional logistic regression suggested that the inverse association of PD risk with sensation seeking was independent of smoking, and caffeine and alcohol intake. Moreover, low sensation seeking explained some of the apparent effect of caffeine and alcohol intake on PD. However, the effect of smoking was weakened only slightly when SSS was included in the regression model.

Conclusion: This study raises the possibility that there is a neurobiological link between low sensation seeking traits—which might underlie the parkinsonian personality—and the hypothetical protective effect of cigarette smoking and caffeine consumption on PD.

Keywords: sensation seeking; Parkinson’s disease; smoking; caffeine; alcohol


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eLetters:

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This could be low testosterone...
James M. Howard
JNNP Online, 28 Feb 2006 [Full text]
Response to Evans et. al.
William H James
JNNP Online, 20 Mar 2006 [Full text]

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