Further data on the validity of the informant questionnaire on cognitive decline in the elderly (IQCODE)

Abstract

The validity of the long and short forms of the IQCODE was studied in a group of 144 elderly ex‐servicemen whose wives served as informants. The study examined the association of the IQCODE with clinical diagnosis of dementia, a battery of neuropsychological and psychological tests, CT scan findings and psychosocial characteristics of informants. For comparison, the validity of the Mini‐Mental State Examination was also examined using the same standards. The IQCODE was found to perform as well as the Mini‐Mental as a screening test for dementia. Unlike the Mini‐Mental, it was not influenced by premorbid intelligence or education. However, it was influenced by other non‐cognitive factors: the..