Answers are grounded in this paper and cite their sources.
The authors investigated neuropsychiatric symptoms in mild cognitive impairment (MCI) from baseline data of the Investigation in the Delay to Diagnosis of AD with Exelon (InDDEx) study (n = 1,010). Neuropsychiatric symptoms were reported in 59% of subjects (Neuropsychiatric Inventory [NPI]). NPI+ subjects had significantly greater impairment on global, cognitive, and functional scores than NPI- subjects. The presence of neuropsychiatric symptoms appears to be a marker of MCI severity.
No takes yet. Share an insight, caveat, or question.
Feldman et al. (2004) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: