Affiliations: [a] Department of Neurology, Memory Clinic, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| [b] International Clinical Research Center, St. Anne’s University Hospital Brno, Brno, Czech Republic
| [c] School of Aging Studies, University of South Florida, Tampa, FL, USA
| [d]
National Institute of Mental Health, Klecany, Czech Republic
| [e] Laboratoire de sciences cognitives, Université Lyon 2, France
Correspondence:
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Correspondence to: Tomas Nikolai, PhD, Department of Neurology, 2nd Faculty of Medicine, Charles University and Motol University Hospital, V Uvalu 84, 150 06, Prague, CzechRepublic. Tel.: +420 224 436 890; Fax: +420 224 436 820; E-mail: [email protected].
Abstract: Background:Subjective cognitive complaints (SCCs) may be an early marker of prodromal Alzheimer’s disease. Objectives:Using a 10-item yes/no SCCs questionnaire (Le Questionnaire de Plainte Cognitive [QPC]), we evaluated the prevalence and distribution of SCCs in cognitively healthy Czech older adults and examined total score and specific QPC items in relation to depressive symptomology and cognitive performance. Methods:A sample of 340 cognitively healthy older community-dwelling volunteers aged 60 or older from the third wave of the longitudinal project National Normative Study of Cognitive Determinants of Healthy Aging, who underwent a comprehensive neuropsychological assessment and completed the QPC and the 15-item Geriatric Depression Scale (GDS-15). Regression analysis was controlled for age when GDS-15 was the outcome and for age and GDS-15 with cognitive domains as the outcome. Results:71% reported 1 + SCCs, with prevalence of individual complaints ranging from 4% to 40%. The number of SCCs was associated with GDS-15 (p < 0.001). Personality change (p < 0.001) and Limitation in daily activities (p = 0.002) were significantly associated with higher GDS-15 score and Spatial orientation difficulties (p = 0.019) and Impression of worse memory in comparison to peers (p = 0.012) were significantly associated with lower memory performance. Conclusions:We identified some cognitive complaints that were very common in our sample. Overall, a higher number of SCCs in well cognitively functioning individuals was most closely related to depressive symptomatology, while some specific complaints reflected lower memory performance and should be considered when screening for people at risk of cognitive decline.
