["This study examined the prevalence and clinical correlates of Capgras syndrome (CS) in Alzheimer's disease.", 'Cross-sectional study of elderly patients evaluated at an outpatient memory disorders clinic classified according to the presence or absence of CS.', "One hundred and fifty-one consecutive patients diagnosed with probable (N=110) or possible (N=48) Alzheimer's disease (AD) utilizing NINCDS-ADRDA diagnostic criteria.", "The Behavioral Pathology in Alzheimer's Disease Rating Scale (BEHAVE-AD), Mini-Mental State Examination (MMSE) and Blessed Dementia Scale (BDS).", 'CS was observed in 10% of the sample (N=16). Associated factors included other delusions, lower MMSE scores and higher BDS scores. The relation between CS and both cognitive and functional status remained significant after controlling for other delusions.'] Does prevalence and correlate of Capgras syndrome in Alzheimer 's disease?