Abstract:
BACKGROUND/AIMS:A large proportion of patients at memory disorders clinics are classified as having subjective cognitive impairment (SCI). Previous research has investigated whether particular lifestyle factors known to affect cognition can be useful in differentiating patients who do not show objective evidence of memory decline. There may also exist subgroups of patients with respect to lifestyle factors that could help clinicians to understand the patient group that presents to memory clinics. These may differ in diagnostic outcome. Very little is known about potential subgroups; however, but such information may help guide interventions and potentially eliminate unnecessary diagnostic procedures. The current study investigated patterns of lifestyle-related variables, including stress, sleep, sensory sensitivity, depression, and negative life events in patients presenting to a memory disorders clinic. The aim was to determine whether subgroups existed and whether it was possible to distinguish those with objectively impaired cognition. METHODS:One hundred and seventy-eight patients (mean age 58 years) from a University Hospital Memory Disorders Clinic. RESULTS:Cluster analysis identified three groups of lifestyle-related variables. Strong determinants of clusters were negative life events and age. Patients with a high number of negative life events also tended to have highest self-reported memory complaint, higher levels of stress, depression, and sensory sensitivity. However, they did not perform the worst on memory testing. In contrast, individuals who performed the worst on memory tests were older, tended to have the least memory complaints, and less negative lifestyle factors; this group also included the highest proportion of patients with mild cognitive impairment and had the lowest median amyloid A-beta 42 (Aβ42). The group with the best cognitive performance were younger, included the highest proportion of patients with SCI and the highest median Aβ42. On lifestyle variables, their ratings fell in between the other groups. CONCLUSIONS:Lifestyle subgroups of patients were determined by stress, emotional problems, and age. The groups were significantly associated with Aβ42 and diagnostic outcome. This pattern may confound the differentiation between objective and subjective memory problems. Asking about lifestyle variables, in conjunction with neuropsychological testing, could potentially identify individuals who are not likely to have objective memory impairment and guide interventions.
journal_name
Dement Geriatr Cogn Disordjournal_title
Dementia and geriatric cognitive disordersauthors
Andersson C,Marklund K,Walles H,Hagman G,Miley-Akerstedt Adoi
10.1159/000505573subject
Has Abstractpub_date
2019-01-01 00:00:00pages
196-206issue
3-4eissn
1420-8008issn
1421-9824pii
000505573journal_volume
48pub_type
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