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12 November 2015 : Clinical Research  

Vascular Factors and Cognitive Dysfunction in Alzheimer Disease

Maria PąchalskaABDEF, Leszek BidzanABCDE, Mariola BidzanABCEG, Jolanta Góral-PółrolaADEFG

DOI: 10.12659/MSM.894550

Med Sci Monit 2015; 21:3483-3489

Abstract

BACKGROUND: The purpose of the present study was to assess the influence of vascular factors on the degree of intensity and rate of progression of cognitive disorders in the course of Alzheimer Disease (AD).

MATERIAL AND METHODS: The research group consisted of 39 persons, all of whom were diagnosed with AD according to the NINCDS/ADRDA criteria. We divided these patients into 2 subgroups, based on the vascular factors measured by the modified Hachinski Ischemic Scale (Ha-mod): group A, without the vascular component (HA-mod score of 0–1 point), and group B, with the vascular component (a score over 1 point). Cognitive functions were evaluated at baseline and again 2 years later, using the Cognitive Part of the Alzheimer Disease Assessment Scale (ADAS-cog).

RESULTS: We found that the patients from subgroup B, with the stronger vascular component, demonstrated the highest intensity of cognitive disorders at baseline, both in terms of the overall ADAS-cog score, and in the subscores for ideational praxis, orientation, spoken language ability, comprehension of spoken language, and word-finding difficulty in spontaneous speech. Another variable which was connected with the intensity of dementia was age. After 2 years, however, the rate of progression of cognitive disorders was not significantly different between the 2 groups.

CONCLUSIONS: The severity of vascular factors correlates directly with the intensity of cognitive disturbances. At the 2-year follow-up examination, however, no correlation was observed in the research group between greater vascular involvement and more rapid progression of cognitive disorders, as measured by the ADAS-cog scale.

Keywords: Alzheimer Disease - psychology, Cognition - physiology, Cognition Disorders - etiology, Disease Progression, Longitudinal Studies, Neuropsychological Tests, Psychiatric Status Rating Scales, Severity of Illness Index, Vascular Diseases - psychology

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Medical Science Monitor Basic Research eISSN: 2325-4416
Medical Science Monitor Basic Research eISSN: 2325-4416