The course of neuropsychiatric symptoms in dementia. Part II: Relationships among behavioural sub-syndromes and the influence of clinical variables

Department of Psychiatry and Neuropsychology, University of Maastricht, The Netherlands.
International Journal of Geriatric Psychiatry (Impact Factor: 2.87). 06/2005; 20(6):531-6. DOI: 10.1002/gps.1317
Source: PubMed


Although several studies have mentioned associations between neuropsychiatric symptoms, there have been no prospective studies determining interrelations among behavioural sub-syndromes.
To investigate the influence of several clinical variables on the course of neuropsychiatric symptoms, and to determine interrelationships between the behavioural sub-syndromes.
One hundred and ninety-nine patients with dementia were assessed every six months for two-years, using the Neuropsychiatric Inventory (NPI) to evaluate neuropsychiatric symptoms.
Age, sex, and socioeconomic status were not associated with a specific neuropsychiatric symptom. Greater cognitive impairment was related to more severe psychosis, and dementia stage influenced the course of total NPI problems. There were strong interrelations among most behavioural sub-syndromes. The sub-syndrome hyperactivity was of influence on the development of psychosis, but not vice versa. Neither was the sub-syndrome mood/apathy of influence on the course of psychosis.
While different neuropsychiatric symptoms have their own specific correlates, there is a strong interrelationship between behavioural sub-syndromes. The data have implications for clinicians and the nosology of neuropsychiatric symptoms in dementia.

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Available from: Marjolein E de Vugt
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    • "As there is not a total clinical progression from one diagnosis group to another, we choose to analyze also a total population subgroup to consider a more objective biomarker continuum point of view. Odds ratios (OR) were calculated for the whole population and for each diagnostic subgroup; then results were sorted according to PET results (positive or negative ) and to a NPI subscore >3 for each behavioral domain [20]. Assuming that amyloid deposition in cortical subregions may vary among patients according to NPI symptoms, we additionally compared mean cortical uptake values (globally and regionally) between symptomatic versus asymptomatic patients for each NPI symptom. "
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    ABSTRACT: Background: Neuropsychiatric symptoms, also known as behavioral and psychological symptoms of dementia (BPSD), affect the majority of patients with dementia, and result in a greater cognitive and functional impairment. Objective: To investigate associations between BPSD and amyloid cerebral deposition as measured by 18F-Florbetapir-PET quantitative uptake in elderly subjects with and without cognitive impairment. Methods: Participants with cognitive impairment [mild cognitive impairment (MCI) or Alzheimer's disease (AD)] and healthy controls (HC) from the ADNI cohort (Alzheimer Disease Neuroimaging Initiative) who underwent an 18F-florbetapir PET scan between May 2010 and March 2014 were included. Clinical assessments included the Clinical Dementia Rating, the Mini-Mental State Examination (MMSE), and the Neuropsychiatric Inventory. Freesurfer software was used to extract PET counts based on T1-based structural ROI (frontal, cingulate, parietal, and temporal). Spearman's partial correlation scores between BPSD severity and regional amyloid uptake were calculated. Results: Data for 657 participants [age = 72.6 (7.19); MMSE = 27.4 (2.67)] were analyzed, including 230 HC [age = 73.1 (6.02); MMSE = 29 (1.21)], 308 MCI [age = 71.5 (7.44); MMSE = 28.0 (1.75)], and 119 AD subjects [age = 74.7 (8.05); MMSE = 23.1 (2.08)]. Considering all diagnostic groups together, positive significant correlations were found between anxiety and 18F-florbetapir uptake in the frontal (r = 0.102; p = 0.009), cingulate (r = 0.083; p = 0.034), and global cerebral uptake (r = 0.099; p = 0.011); between irritability and frontal (r = 0.089; p = 0.023), cingulate (r = 0.085; p = 0.030), parietal (r = 0.087; p = 0.025), and global cerebral uptake (r = 0.093; p = 0.017); in the MCI subgroup, between anxiety and frontal (r = 0.126; p = 0.03) and global uptake (r = 0.14; p = 0.013); in the AD subgroup, between irritability and parietal uptake(r = 0.201; p = 0.03). Conclusion: Anxiety and irritability are associated with greater amyloid deposition in the neurodegenerative process leadingto AD.
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    • "In psychogeriatric patients who suffer from cognitive impairment or dementia, there is an 80% prevalence of two or more psychiatric symptoms, e.g. depression, anxiety, paranoia, aggression [1,2]. Multiple psychiatric symptoms (MPS) have many related negative effects on the quality of life of the patients as well as on caregiver burden and competence [1,3,4]. "
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    ABSTRACT: There is an 80% prevalence of two or more psychiatric symptoms in psychogeriatric patients. Multiple psychiatric symptoms (MPS) have many negative effects on quality of life of the patient as well as on caregiver burden and competence. Irrespective of the effectiveness of an intervention programme, it is important to take into account its economic aspects. The economic evaluation was performed alongside a single open RCT and conducted between 2001 and 2006. The patients who met the selection criteria were asked to participate in the RCT. After the patient or his caregiver signed a written informed consent form, he was then randomly assigned to either IRR or UC.The costs and effects of IRR were compared to those of UC. We assessed the cost-utility of IRR as well as the cost-effectiveness of both conditions. Primary outcome variable: severity of MPS (NPI) of patients; secondary outcome variables: general caregiver burden (CB) and caregiver competence (CCL), quality of life (EQ5D) of the patient, and total medical costs per patient (TiC-P). Cost-utility was evaluated on the basis of differences in total medical costs). Cost-effectiveness was evaluated by comparing differences of total medical costs and effects on NPI, CB and CCL (Incremental Cost-Effectiveness Ratio: ICER). CEAC-analyses were performed for QALY and NPI-severity. All significant testing was fixed at p<0.05 (two-tailed). The data were analyzed according to the intention-to-treat (ITT)-principle. A complete cases approach (CC) was used. IRR turned out to be non-significantly, 10.5% more expensive than UC ([euro sign] 36 per day). The number of QALYs was 0.01 higher (non-significant) in IRR, resulting in [euro sign] 276,290 per QALY. According to the ICER-method, IRR was significantly more cost-effective on NPI-sum-severity of the patient (up to 34%), CB and CCL (up to 50%), with ICERs varying from [euro sign] 130 to [euro sign] 540 per additional point of improvement. No significant differences were found on QALYs. In IRR patients improved significantly more on severity of MPS, and caregivers on general burden and competence, with incremental costs varying from [euro sign] 130 to [euro sign] 540 per additional point of improvement. The surplus costs of IRR are considered acceptable, taking into account the high societal costs of suffering from MPS of psychogeriatric patients and the high burden of caregivers. The large discrepancy in economic evaluation between QALYs (based on EQ5D) and ICERs (based on clinically relevant outcomes) demands further research on the validity of EQ5D in psychogeriatric cost-utility studies. (Trial registration nr.: ISRCTN 38916563; December 2004).
    Full-text · Article · Sep 2013 · BMC Health Services Research
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    • "The primary outcome variable was the number of ''MPS'' assessed by number (0–12) as well as sum severity (0–144, number × frequency × severity) using the NPI (12-item version; Cummings et al., 1994). We distinguished four NPI clusters (Aalten et al., 2005): cluster hyperactivity: aggression, euphoria, disinhibition, irritability, and repetitive behavior; psychosis: delusion, hallucinations, and sleep disturbances; affective symptoms: depression and anxiety; and apathy: apathy and eating disorders. The NPI was administered to the caregiver. "
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    Full-text · Article · Aug 2012 · International Psychogeriatrics
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