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Journal of Geriatric Psychiatry and Neurology, Vol. 19, No. 2, 65-71 (2006)
DOI: 10.1177/0891988706286230

Frequency and Clinical Determinants of Poststroke Cognitive Impairment in Nondemented Stroke Patients

Wai Kwong Tang, MRCPsych

Department of Psychiatry, Chinese University of Hong Kong, tangwk{at}cuhk.edu.hk

Sandra S. M. Chan, MRCPsych

Department of Psychiatry, Chinese University of Hong Kong

Helen F. K. Chiu, FRCPsych

Department of Psychiatry, Chinese University of Hong Kong

Gabor S. Ungvari, FRCPsych

Department of Psychiatry, Chinese University of Hong Kong

Ka Sing Wong, MD

Department of Medicine and Geriatrics, Chinese University of Hong Kong

Timothy C. Y. Kwok, MRCP

Department of Medicine and Geriatrics, Chinese University of Hong Kong

Vincent Mok, MRCP

Department of Medicine and Geriatrics, Chinese University of Hong Kong

K. T. Wong, MD

Department of Diagnostic Radiology and Organ Imaging, Hong Kong SAR, China

Polly S. Richards, MBBS

Department of Diagnostic Radiology and Organ Imaging, Hong Kong SAR, China

Anil T. Ahuja, MD

Department of Diagnostic Radiology and Organ Imaging, Hong Kong SAR, China

The objective of this study was to examine the prevalence and clinical correlates of poststroke cognitive impairment in Chinese stroke patients in Hong Kong. One hundred seventy-nine stroke patients were interviewed by a psychiatrist 3 months after their stroke. Cognitive impairment was determined according to the Mini-Mental State Examination score. Thirty-nine participants (21.8%) had cognitive impairment. Univariate analysis found that cognitive impairment was associated with age, female sex, level of education, previous stroke, prestroke Rankin score, National Institutes of Health Stroke Scale dysarthria and total scores, urinary incontinence, and cerebral atrophy index. Multivariate logistic regression suggested that female sex, education, National Institutes of Health Stroke Scale dysarthria score, urinary incontinence, and atrial fibrillation were independent risk factors of poststroke cognitive impairment. After removal of 54 patients with previous stroke from the sample, the frequency of cognitive impairment decreased to 18.4%. It was concluded that cognitive impairment is common among nondemented Chinese stroke patients in Hong Kong.

Key Words: stroke • Chinese • cognitive impairment


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