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The Subjective Cognitive Decline Questionnaire (SCD-Q): A Validation Study
- Source :
- JOURNAL OF ALZHEIMERS DISEASE, r-IIB SANT PAU. Repositorio Institucional de Producción Científica del Instituto de Investigación Biomédica Sant Pau, instname
- Publication Year :
- 2014
- Publisher :
- IOS Press, 2014.
-
Abstract
- Background: Subjective cognitive decline (SCD) is gaining importance as a focus of investigation, but adequate tools are needed for its quantification. Objective: To develop and validate a questionnaire to quantify SCD, termed the Subjective Cognitive Decline Questionnaire (SCD-Q). Methods: 124 controls (CTR), 144 individuals with SCD, 83 mild cognitive impairment subjects, 46 Alzheimer's disease patients, and 397 informants were included. The SCD-Q contains: part I, named MyCog, which is answered by the subject; and part II, TheirCog, which includes the same questions and is answered by the informant or caregiver. The 24 SCD-Q items assess the perceived subjective decline in memory, language, and executive functions in the last two years. Results: The MyCog scores of controls differed significantly from those of the other groups (p < 0.05) and there were significant differences in TheirCog scores between all groups. The optimal TheirCog cut-off score for discriminating between individuals with and without cognitive impairment was 7/24 (sensitivity 85%, specificity 80%). MyCog scores correlated significantly with anxiety and depression (r = 0.29, r = 0.43, p < 0.005), but no correlations were found with neuropsychological tests. TheirCog scores correlated significantly with most of the neuropsychological tests (p < 0.05). Informants' depression and anxiety influenced TheirCog scores in controls and SCD groups. Conclusion: Self-perceived cognitive decline, measured by the SCD-Q part I (MyCog), discriminated SCD from CTR. Part II (TheirCog) was strongly related to subjects' objective cognitive performance, and discriminated between subjects with or without cognitive impairment. The SCD-Q is a useful tool to measure self-perceived cognitive decline incorporating the decliner and the informant perspective.
- Subjects :
- cognition
Male
medicine.medical_specialty
diagnosis
Disease
Anxiety
Neuropsychological Tests
Sensitivity and Specificity
memory
Executive Function
test
Alzheimer Disease
Memory
Surveys and Questionnaires
hemic and lymphatic diseases
medicine
Humans
Cognitive Dysfunction
Effects of sleep deprivation on cognitive performance
Cognitive decline
Psychiatry
Depression (differential diagnoses)
Aged
Language
Depression
General Neuroscience
Neuropsychology
Cognition
General Medicine
Alzheimer's disease
Middle Aged
Executive functions
Self Concept
Psychiatry and Mental health
Clinical Psychology
Caregivers
Female
Self Report
Geriatrics and Gerontology
medicine.symptom
Cognition Disorders
Factor Analysis, Statistical
Psychology
Clinical psychology
Subjects
Details
- ISSN :
- 18758908 and 13872877
- Volume :
- 41
- Database :
- OpenAIRE
- Journal :
- Journal of Alzheimer's Disease
- Accession number :
- edsair.doi.dedup.....3e2b22cd4872087dbecc54fd50238b29