title: Course and causes of suspected dementia in young adults: a longitudinal study.
abstract: The authors performed a prospective, unbiased analysis of a cohort of young patients assessed consecutively with the question of dementia. The onset of patients' cognitive symptoms was prior to the age of 65 years. A study group of 226 patients was followed for a mean duration of 4.59 +/- 2.23 years (1 SD; range, 0.04-7.86 years). The diagnoses were established using published diagnostic criteria. A diagnosis of dementia was made in 112 patients (49.56%). Psychiatric disease was the most common diagnosis in those who did not have dementia (24.3%) followed by frontotemporal lobar degeneration (19.0%), Alzheimer's disease (11.9%), patients with cognitive symptoms who obtained normal neuropsychometric profiles (10.6%), nonneurological disorders (eg, obstructive sleep apnea [8.4%]), neurological disorders (eg, Parkinson's disease [4.9%]), and mild cognitive impairment (4.9%). The frequencies of frontotemporal lobar degeneration and psychiatric disease were higher than Alzheimer's disease, unlike in older populations.
authors.affiliation: Neurosciences Unit, Health Department of Western Australia, Perth. macfarlane4@optusnet.com.au
authors.forename: Peter K
authors.initials: PK
authors.lastname: Panegyres
authors.forename: Kate
authors.initials: K
authors.lastname: Frencham
mesh_terms: D000328:Adult; D000367:Age Factors; D000544:Alzheimer Disease / Q000175:diagnosis / Q000523:psychology; D003072:Cognition Disorders / Q000175:diagnosis / Q000209:etiology / Q000523:psychology; D003704:Dementia / Q000175:diagnosis / Q000209:etiology* / Q000523:psychology; D015140:Dementia, Vascular / Q000175:diagnosis / Q000523:psychology; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D020961:Lewy Body Disease / Q000175:diagnosis / Q000523:psychology; D008137:Longitudinal Studies; D008297:Male; D001523:Mental Disorders / Q000175:diagnosis / Q000523:psychology; D008875:Middle Aged; D009460:Neurologic Examination; D009483:Neuropsychological Tests; D011446:Prospective Studies