• The underlying diagnosis of Capgras delusion is not found to be exclusively paranoid schizophrenia, nor is the sex exclusively female, as once was believed. Organic factors play a predominant role in many patients, and 41% of the cases are males. The age at diagnosis in those considered to be schizophrenic is older than is usually expected.
Merrin EL, Silberfarb PM. The Capgras Phenomenon. Arch Gen Psychiatry. 1976;33(8):965–968. doi:10.1001/archpsyc.1976.01770080083008