Neuropsychiatric symptoms in patients with dementia in primary care: a study protocol

BACKGROUND: Neuropsychiatric symptoms (NPS) frequently occur in patients with dementia. To date, prospective studies on the course of NPS have been conducted in patients with dementia in clinical centers or psychiatric services. The primary goal of this study is to investigate the course of NPS in patients with dementia and caregiver distress in primary care. We also aim to detect determinants of both the course of NPS in patients with dementia and informal caregiver distress in primary care. METHODS/DESIGN: This is a prospective observational study on the course of NPS in patients with dementia in primary care. Thirty-seven general practitioners (GPs) in 18 general practices were selected based on their interest in participating in this study. We will retrieve electronic medical files of patients with dementia from these general practices. Patients and caregivers will be followed for 18 months during the period January 2012 to December 2013. Patient characteristics will be collected at baseline. Time to death or institutionalization will be measured. Co-morbidity will be assessed using the Charlson index. Psychotropic drug use and primary and secondary outcome measures will be measured at 3 assessments, baseline, 9 and 18 months. The primary outcome measures are the Neuropsychiatric Inventory score for patients with dementia and the Sense of Competence score for informal caregivers. In addition to descriptive analyses frequency parameters will be computed. Univariate analysis will be performed to identify determinants of the course of NPS and informal caregiver distress. All determinants will then be tested in a multivariate regression analysis to determine their unique contribution to the course of NPS and caregiver distress. DISCUSSION: The results of this study will provide data on the course of NPS, which is clinically important for prognosis. The data will help GPs and other professionals in planning follow-up visits and in the timing for offering psycho-education, psychosocial interventions and the provision of care. In addition, these data will enlarge health professionals’ awareness of NPS in their patients with dementia

Dependence of Intramyocardial Pressure and Coronary Flow on Ventricular Loading and Contractility: A Model Study

The phasic coronary arterial inflow during the normal cardiac cycle has been explained with simple (waterfall, intramyocardial pump) models, emphasizing the role of ventricular pressure. To explain changes in isovolumic and low afterload beats, these models were extended with the effect of three-dimensional wall stress, nonlinear characteristics of the coronary bed, and extravascular fluid exchange. With the associated increase in the number of model parameters, a detailed parameter sensitivity analysis has become difficult. Therefore we investigated the primary relations between ventricular pressure and volume, wall stress, intramyocardial pressure and coronary blood flow, with a mathematical model with a limited number of parameters. The model replicates several experimental observations: the phasic character of coronary inflow is virtually independent of maximum ventricular pressure, the amplitude of the coronary flow signal varies about proportionally with cardiac contractility, and intramyocardial pressure in the ventricular wall may exceed ventricular pressure. A parameter sensitivity analysis shows that the normalized amplitude of coronary inflow is mainly determined by contractility, reflected in ventricular pressure and, at low ventricular volumes, radial wall stress. Normalized flow amplitude is less sensitive to myocardial coronary compliance and resistance, and to the relation between active fiber stress, time, and sarcomere shortening velocity

The course of neuropsychiatric symptoms in community-dwelling patients with dementia: a systematic review

Background: Neuropsychiatric symptoms (NPS) often occur in patients with dementia. Understanding the course of NPS in dementia is important for healthcare professionals for psycho-educational purposes and adequate and timely interventions to prevent or diminish NPS as much as possible. Methods: We conducted a systematic literature search in several electronic databases. We combined search strings for the terms dementia, community-dwelling, cohort studies and NPS. Screening titles and abstracts, assessing the methodological quality and data-extraction were independently conducted by at least two authors. Results: This literature search revealed 6605 unique records of which 23 studies were included in data synthesis. In total 7184 patients participated in the included studies with a mean number of 312. Sixty percent of the participants were female and the mean age of all participants was 74.8 years. Follow-up varied between 1 and 6 years; in 17 studies loss to follow-up was less than 20% per year. NPS are highly prevalent, incident and persistent although frequency parameters vary considerably across studies. Delusions/delusional misidentification, wandering/agitation, aberrant motor behavior/motor hyperactivity and apathy are the most common NPS. For hallucinations, delusions/delusional misidentification, paranoia, aggression, wandering/agitation, aberrant motor behavior/motor hyperactivity, disinhibition, apathy, and sleep disturbance increasing trends in point prevalence rates have been found. Conclusions: NPS in community-dwelling patients are frequent and persistent. The increasing trends of several NPS in the course of dementia require a preventive approach of professional caretakers. For such an approach, a timely diagnosis and adequate professional support to prevent or diminish these problems is necessary

Neuropsychiatric symptoms and psychotropic drug use in patients with dementia in general practices

Background. Neuropsychiatric symptoms (NPS) frequently occur in community-dwelling patients with dementia and they are also frequently prescribed psychotropic drugs. The prescription of psychotropic drugs has been found to be associated with the level of NPS. Data on NPS in patients with dementia in general practices are scarce. Objectives. The aim of this study was to assess the prevalence rates of NPS and psychotropic drug use (PDU) in patients with dementia in general practices. Methods. We analyzed data from the baseline measurement of a prospective cohort study in a sample of (Dutch) patients in general practices. Prevalence rates of NPS and subsyndromes assessed with the Neuropsychiatric Inventory (NPI) and of PDU were calculated. Prevalence rates of individual NPS are presented both as clinically relevant symptoms (NPI symptom score = 4) and as prevalence rates of symptoms with symptom score > 0. Results. Of the 117 patients, more than 90% had at least one symptom and more than 65% had at least one clinically relevant symptom. The most common NPS were agitation/aggression, dysphoria/ depression and irritability/lability. The most common clinically relevant NPS were aberrant motor behaviour, agitation/aggression and apathy/indifference. Only 28.7% of the patients used at least one, 7.0% used at least two different and 1.7% used at least three different types of psychotropic drugs (excluding anti-dementia medication). Conclusions. NPS are highly prevalent in patients with dementia in general practices, but PDU is rather low. The most common clinically relevant NPS were aberrant motor behaviour, agitation/ aggression and apathy/indifference

Neuropsychiatric symptoms and psychotropic drug use in patients with dementia in general practices

Background: Neuropsychiatric symptoms (NPS) frequently occur in community-dwelling patients with dementia and they are also frequently prescribed psychotropic drugs. The prescription of psychotropic drugs has been found to be associated with the level of NPS. Data on NPS in patients with dementia in general practices are scarce. Objectives: The aim of this study was to assess the prevalence rates of NPS and psychotropic drug use (PDU) in patients with dementia in general practices. Methods: We analyzed data from the baseline measurement of a prospective cohort study in a sample of (Dutch) patients in general practices. Prevalence rates of NPS and subsyndromes assessed with the Neuropsychiatric Inventory (NPI) and of PDU were calculated. Prevalence rates of individual NPS are presented both as clinically relevant symptoms (NPI symptom score ≥ 4) and as prevalence rates of symptoms with symptom score > 0. Results: Of the 117 patients, more than 90% had at least one symptom and more than 65% had at least one clinically relevant symptom. The most common NPS were agitation/aggression, dysphoria/depression and irritability/lability. The most common clinically relevant NPS were aberrant motor behaviour, agitation/aggression and apathy/indifference. Only 28.7% of the patients used at least one, 7.0% used at least two different and 1.7% used at least three different types of psychotropic drugs (excluding anti-dementia medication). Conclusions: NPS are highly prevalent in patients with dementia in general practices, but PDU is rather low. The most common clinically relevant NPS were aberrant motor behaviour, agitation/aggression and apathy/indifference

The course of neuropsychiatric symptoms in patients with dementia in primary care

BACKGROUND: During the course of dementia, most people develop some type of neuropsychiatric symptoms (NPS), which result in lower quality of life, high caregiver burden, psychotropic drug use and a major risk of institutionalization. Studies on NPS in people with dementia have been mainly conducted in clinical centres or psychiatric services. OBJECTIVES: To investigate the course of NPS in people with dementia in primary care. METHODS: Analysis of (cumulative) prevalence and incidence, persistence and resolution based on data collected during an assessment at home of a prospective naturalistic cohort study in primary care in a sample of 117 people with dementia and their informal caregivers. Subsyndromes of NPS were assessed with the Neuropsychiatric Inventory (NPI) and Cohen-Mansfield Agitation Inventory. Multivariate analyses were used to detect determinants for the course of NPS. RESULTS: The mean age of the people with dementia was 78.6 years, and 52% were female. Mean Mini-Mental State Examination total score was 19.5, mean NPI total score 15.7. The most prevalent clinically relevant subsyndromes of the NPI were hyperactivity and mood/apathy, and the most prevalent individual NPS were aberrant motor behaviour (28%), agitation/aggression (24%) and apathy/indifference (22%). Of the people with dementia, 72.3% had one or more symptoms of the mood/apathy and 75.3% of the hyperactivity subsyndrome. CONCLUSIONS: GPs should be aware of NPS in people with dementia and should actively identify them when they visit these patients or when informal caregivers consult them. Timely diagnosing facilitates adequate professional care

Psychological distress in informal caregivers of patients with dementia in primary care: course and determinants

BACKGROUND: The course of psychological distress in informal caregivers of patients with dementia has been investigated in longitudinal studies with conflicting outcomes. OBJECTIVES: We investigated the course and determinants of psychological distress in informal caregivers of patients with dementia in primary care. METHODS: In this prospective observational cohort study, data were collected at baseline, after 9 and 18 months. We assessed cognition and neuropsychiatric symptoms (NPS) of the patient (Mini-Mental State Examination and Neuropsychiatric Inventory) and psychological distress (Sense of Competence Questionnaire, Center for Epidemiological Studies Depression scale and General Health Questionnaire 12-tem version) of the informal caregivers. Determinants for the course of psychological distress were caregivers' age, gender and relationship with the patient, patients' cognition and NPS, participation in a care program and admission to long-term care facilities (LTCF). With linear mixed models, the course over time for psychological distress and its determinants were explored. RESULTS: We included 117 informal caregivers, of whom 23.1% had a high risk for depression and 41.0% were identified to be likely to have mental problems at baseline. We found a stable pattern of psychological distress over time. Higher frequency of NPS, informal caregivers' age between 50 and 70 years and being female or spouse were associated with higher psychological distress. For patients who were admitted to a LTCF during the study psychological distress of the informal caregivers improved. CONCLUSIONS: GPs should focus on NPS in patients with dementia and on caregivers' psychological distress and be aware of their risk for depression and mental problems, specifically to those who are spouse, female or between 50 and 70 years of age