Abstract:
:Several recent autopsy studies suggest that senile dementia of Lewy body type (SDLT) may be the second most common neuropathologic cause of dementia in the elderly, accounting for 7 to 30% of all cases. Operational criteria for the antemortem clinical diagnosis of SDLT have already been proposed by our group. The performance of these is now examined by randomizing the case notes from a new series of SDLT, Alzheimer, and multi-infarct dementia patients for psychiatric assessment by four raters of varying clinical experience and blind to pathologic diagnosis. Using the SDLT criteria, the two most experienced raters agreed in 94% of cases (kappa = 0.87), with the least experienced rater agreeing in 78% (kappa = 0.50). Diagnostic specificity for SDLT was uniformly high (90.0 to 97.0%), with a mean sensitivity of detection of 74%, and was greater by the experienced (90.0%) than the least experienced (55%) clinician. The antemortem identification of SDLT patients can therefore be achieved with a high degree of diagnostic specificity using such operationalized criteria, although there remains a minority of patients who present with either "typical" Alzheimer-type symptoms or with paranoid or delusional symptoms in the absence of substantial cognitive impairment. Sensitivity to neuroleptics may be a useful diagnostic pointer in these patients.
journal_name
Neurologyjournal_title
Neurologyauthors
McKeith IG,Fairbairn AF,Bothwell RA,Moore PB,Ferrier IN,Thompson P,Perry RHdoi
10.1212/wnl.44.5.872subject
Has Abstractpub_date
1994-05-01 00:00:00pages
872-7issue
5eissn
0028-3878issn
1526-632Xjournal_volume
44pub_type
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