Background: Subjective cognitive decline (SCD) may precede mild cognitive impairment (MCI), and its diagnosis and intervention play a significant role in promoting the prevention and treatment of Alzheimer's disease.
Objective: To review the evolution of the SCD concept, diagnostic
approaches, prevalence rates, and key influencing factors.
Methods: Using literature retrieval, with "subjective
cognitive decline+the elderly" "subjective cognitive decline+elder
people" or "subjective cognitive decline+old people" as the
keywords, empirical papers published in English or Chinese in the past 20 years
were reviewed from Google Scholar, Pubmed, CNKI, and Wanfang Database.
Results: Sixty articles were included. Previous studies have shown
that the definition of SCD has undergone four stages over 43 years, with
gradually evolving definitions and criteria over time. The diagnosis of SCD
includes assessment with scales and laboratory testing, but there is a lack of
standardized diagnostic procedures and gold standards for testing. The
prevalence of SCD in the elderly ranges from 17.4% to 80.0%, with significant
regional differences. The influencing
factors of SCD in the elderly involve multiple levels and dimensions, including
demographic variables, psychological factors, social factors, and biomedical
factors.
Conclusion: SCD is common among the elderly and can greatly hinder
their physical and mental health as well as quality of life. Future research
should focus on developing standardized diagnostic criteria, establishing
universally accepted testing methods, and conducting large-scale longitudinal
and cross-cultural studies to better understand the trajectory of SCD.
Author (s) Details
Hou Yongmei
Department of Psychology, School of Humanities and Management, Guangdong
Medical University, Dongguan, Guangdong Province, 523808, China.
Please see the book here:- https://doi.org/10.9734/bpi/dhrd/v7/4490
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