Affiliations: [a] Neurology Service, University Hospital Gregorio Marañón, Madrid, Spain
| [b] Psychiatry Department, University Hospital 12 de Octubre, Madrid, Spain
| [c]
Alzheimer’s Center Reina Sofía Foundation - CIEN Foundation and CIBERNED, Carlos III Institute of Health, Madrid, Spain
| [d] CIBERSAM, Madrid, Spain
| [e] Memory Disorders Unit, HM Hospitals, Madrid, Spain
Correspondence:
[*]
Correspondence to: Correspondence to: Javier Olazarán, Servicio de Neurología, HGU Gregorio Marañón, Dr. Esquerdo 46, 28007 Madrid, Spain. Tel.: +34 915868339; E-mail: javier@mariawolff.es.
Abstract: Background:Comprehensive clinicopathological studies of neuropsychiatric symptoms (NPS) in dementia are lacking. Objective:To describe the pathological correlations of NPS in a sample of institutionalized people with dementia. Methods:We studied 59 people who were consecutively admitted to a nursing home and donated their brain. Correlations between pathological variables and NPS upon admission (n = 59) and at one-year follow-up assessment (n = 46) were explored and confirmed using bivariate and multivariate statistical methods. Results:Mean (SD) age at admission was 83.2 (6.4) years and mean (SD) age at demise was 85.4 (6.6); 73% of the subjects were female and 98% presented advanced dementia. The most frequent etiological diagnosis was Alzheimer’s disease (AD; 74.6% clinical diagnosis, 67.8% pathological diagnosis). The pathological diagnosis of AD was associated with aggression (β est 0.31), depression (β est 0.31), anxiety (β est 0.38), and irritability (β est 0.28). Tau stage correlated with aggressive symptoms (β est 0.32) and anxiety (βest 0.33). Coexistence of AD and Lewy body pathology was associated with depression (β est 0.32), while argyrophilic grains were associated with eating symptoms (β est 0.29). Predictive models were achieved for apathy, including cognitive performance, basal ganglia ischemic lesions, and sex as predictors (R2 0.38) and for sleep disorders, including pathological diagnosis of AD and age at demise (R2 0.18) (all p-values <0.05, unadjusted). Conclusion:AD was the main pathological substrate of NPS in our sample of very elderly people with advanced dementia. However, correlations were mild, supporting a model of focal/asymmetric rather than diffuse brain damage, along with relevance of environmental and other personal factors, in the genesis of those symptoms.
