Cognitive impairment among the elderly in a Korean rural community

ABSTRACT— Cognitive function among the elderly aged 65 or older was studied in a rural community of Korea. The prevalence rates of cognitive impairment were significantly higher in females (64%) than in males (33%). Sex differences of prevalence of both mild impairment (25% in males vs 45% in females) and severe (8% in males vs 19% in females) reached statistically significant levels. The prevalence of severe impairment increased with age, and the age-related increase was steeper after 80 in males and after 75 in females. The prevalence of mild impairment, on the other hand, did not increase so prominently with aging. From this point of view, it could be assumed that severe cognitive impairment may be highly related to real dementia, and that the elderly with mild impairment may consist of heterogenous groups associated with cognitive dysfunction of mild degree.     

Prevalence and correlates of behavioral and psychiatric symptoms in community-dwelling elders with dementia or mild cognitive impairment: the Memory and Medical Care Study

BACKGROUND: Little is known about the prevalence and correlates of behavioral and psychiatric symptoms of dementia in community-dwelling elders with dementia or mild cognitive impairment (MCI). METHODS: 512 people with Mini-Mental State Examination (MMSE) scores < 24 or a decline of at least 4 points over two administrations, and their knowledgeable informants (KIs) were enrolled in the MMCS. The classification of subjects as having dementia or MCI was based on a neuropsychological battery of four tests, not a clinical diagnostic evaluation. The sample for this study included 454 subjects (dementia n = 333; MCI n = 121) and their KIs. Demographic and health-related characteristics of subjects and KIs were obtained during KI interviews. Multivariate logistic regression was used in statistical analysis. RESULTS: Compared to dementia subjects, those classified as MCI had a lower prevalence (47.1% vs 66.1%) of any symptoms (psychosis, depression, or agitation), and of agitation (24.8% vs 45.1%). Symptoms of psychosis and depression also were less prevalent, even though differences did not reach statistical significance. In the dementia group symptoms were associated with a report of a physician's diagnosis of dementia, greater functional impairment, and a KI who was a child/child-in-law. In those with MCI, symptoms were correlated with being white, greater functional impairment, and a younger, less educated, KI. CONCLUSIONS: Psychiatric and behavioral symptoms were common in community-residing elders with cognitive impairment, but their prevalence and correlates differed by study classification as having dementia or MCI. Identifying and treating these symptoms may benefit patients with cognitive impairment and their families. Longitudinal studies on the predictors, changes in prevalence, and effectiveness of treatments for psychopathology of dementia are needed.     

Prevalence and Clinical Aspects of Mild Cognitive Impairment in Parkinson's Disease: A Meta-Analysis

Mild cognitive impairment associated with Parkinson's disease (PD) is a risk factor for the development of dementia. Despite the importance of early identification of mild cognitive impairment in PD, its prevalence and clinical correlates are still debated. The present meta-analysis provides a robust estimate of prevalence rate of mild cognitive impairment in PD according to the Movement Disorder Society clinical criteria and to explore the differences between PD patients with and without mild cognitive impairment in demographic, clinical, and neuropsychiatric features. A systematic literature search was performed up to April 2019 using PsycInfo (PROQUEST), PubMed, and Scopus. From 4706 titles and abstracts, 41 studies were selected (n = 7053 patients). Pooled mild cognitive impairment prevalence was 40% on a total sample of 7053 PD patients (95% confidence interval = 36–44; Q = 490.14, P < 0.0001; I² = 91.84%) with a higher frequency for the multiple domain subtype (31%; 95% confidence interval = 23–41, Q = 93.24; P < 0.0001; I² = 92.49%). Meta-regression analysis revealed that stage of PD moderate prevalence estimates of mild cognitive impairment (β = 2.80; P = 0.008). Mild cognitive impairment in PD was associated with older age, lower education, longer disease duration, higher levodopa equivalent daily dose, more severe motor symptoms, and postural instability/gait difficulty motor subtype, poorer quality of life, higher levels of apathy, and depression. The present meta-analysis indicated that mild cognitive impairment in PD is a frequent cognitive status deserving to be early detected by means of standardized cognitive assessments in clinical practice. © 2019 International Parkinson and Movement Disorder Society     

帕金森病认知功能损害

帕金森病（Parkinson’s disease,PD）认知功能损害近年来受到人们的关注,PD认知损害严重影响患者的日常生活能力,早期诊断和干预PD认知损害将有助于延缓PD痴呆的发生。本文就PD认知功能损害的发生率、诊断标准及治疗等方面进行简要综述。     

糖尿病与认知功能损害相关性的流行病学进展

糖尿病与认知功能损害都是中老年人易患疾病。糖尿病是脑卒中的已知危险因素,会导致血管性痴呆,但与阿尔茨海默病之间的相关性仍没有定论,大多数研究认为两者成正相关,部分研究则认为两者无关。     

急性缺血性卒中患者血管性认知障碍及其亚型的相关因素分析

目的探讨急性缺血性卒中患者血管性认知障碍(vascular cognitive impairment,VCI)及其亚型非痴呆性血管性认知障碍(VCI-no dementia,VCIND)与血管性痴呆(vascular dementia,Va D)发生的主要相关因素。方法选择2014年6月至2015年6月就诊于天津医科大学总医院神经内科的491例急性缺血性卒中患者为研究对象,应用前期已建立的血管性认知障碍数据库记录患者的一般人口学信息、病史、体格检查、血管危险因素、生化及影像检查信息,对患者进行美国国立卫生研究院卒中量表(National Institutes of Health Stroke Scale,NIHSS)评分、Essen评分及低分子肝素治疗急性卒中试验(the Trial of Org 10172 in Acute Stroke Treatment,TOAST)分型,于发病(10±2)d进行蒙特利尔认知量表(Montreal Cognitive Assessment,Mo CA)、临床痴呆量表(Clinical Dementia Rating,CDR)、日常生活能力量表(Activities of Daily Living,ADL)评分,依据血管性认知障碍诊治指南中VCI的诊断及分类诊断标准将患者分为认知正常组(no cognitive impairment,NCI)和VCI组,VCI组包括VCIND组和Va D组,分析上述各项因素的组间差异及相关性。结果 491例急性缺血性卒中患者中VCI占69.86%,其中包括37.68%的VCIND和32.18%的Va D患者。1VCI组低受教育程度(P0.001)、糖尿病(P=0.005)、心脏病(P=0.045)、卒中家族史(P=0.005)、幕上病变(P0.001)的比例及卒中次数(P=0.014)、D-二聚体水平(P=0.001)、Essen评分(P=0.024)、NIHSS评分(P0.001)显著高于NCI组,女性(P=0.004)、幕下病变(P0.001)的比例及受教育年(P0.001)显著低于NCI组,差异均有显著性;Logistic回归分析显示低受教育程度、糖尿病、幕上病变和高D-二聚体水平是VCI的独立危险因素。2与VCIND组比较,Va D组患者既往卒中史(P=0.013)、TOAST分型中大动脉粥样硬化型梗死(P0.001)的比例及卒中次数(P=0.001)、Essen评分(P=0.032)、神经功能缺损程度(P=0.005)显著高于VCIND组,TOAST分型中小动脉闭塞型梗死(P0.001)、幕下病变(P0.001)的比例显著低于VCIND组,差异均有显著性;Logistic回归分析显示卒中次数、神经功能缺损程度、大动脉粥样硬化型梗死是Va D的独立危险因素,而幕下病变患者发生Va D的风险明显小于幕上病变患者。结论 VCI及其亚型的影响因素不同,与NCI比较,低受教育程度、糖尿病、幕上病变和高D-二聚体水平是VCI的独立危险因素;与VCIND比较,卒中次数、严重的神经功能缺损、TOAST分型中大动脉粥样硬化型梗死是Va D的独立危险因素。     

From mild cognitive impairment to dementia: a prevalence study in a district of Tuscany, Italy

OBJECTIVE: A door-to-door two-phase study was designed in order to estimate the prevalence of cognitive deficit amongst the residents of a district in Tuscany (central Italy). Identification of cases with mild cognitive impairment (MCI) was given high priority, because this condition has been suggested as a term for the boundary area between normal aging and dementia. METHODS: Of the 1600 subjects who completed the screening phase, 354 scored under the cut-off point of the Mini Mental State Examination and Clinical Dementia Rating and were investigated by means of a standardized diagnostic protocol. RESULTS: The prevalence of MCI and age-related cognitive decline was 4.9 and 9.3%, respectively; low levels of education significantly increased the risk of these conditions. The prevalence of dementia over age 65 was 6.2%, with a significant risk association with age. In our population, Alzheimer's disease was the most frequent type of dementia (prevalence rate 4.2%) and increased risk depending on age, sex and education has been found. CONCLUSIONS: Our findings are somewhat similar to previous studies. Further epidemiological and longitudinal studies are warranted to identify which diagnostic category is more predictive for dementia.     

Prevalence and Incidence of Dementia in South Korea: A Nationwide Analysis of the National Health Insurance Service Senior Cohort

Background and PurposeDementia is rapidly becoming more common in the elderly population of South Korea, and there are regional difference in its demographics. This study investigated the trajectories in the prevalence and incidence of dementia based on the Seoul metropolitan area and other areas in South Korea using big data from the National Health Insurance Service (NHIS).MethodsWe examined a population-based elderly cohort obtained from the NHIS Senior Cohort (NHIS-SC) data set that comprises approximately half a million recipients of medical insurance in South Korea during 2003–2015. The age-standardized prevalence and incidence of dementia as well as their trajectories from 2003 were estimated. Regional differences in these rates between Seoul metropolitan area and other areas were also analyzed.ResultsThe standardized prevalence of dementia per 100,000 increased significantly from 178.11 in 2003 to 5,319.01 in 2015 (p<0.001). The standardized prevalence of dementia was higher in other areas than in Seoul metropolitan area. The standardized incidence of dementia per 100,000 person-years also increased significantly, from 126.41 in 2003 to 2,218.25 in 2015 (p<0.001). The standardized incidence of dementia was similarly higher in other areas than in Seoul metropolitan area (p<0.001).ConclusionsThis study has shown that the standardized prevalence and incidence of dementia increased steadily from 2003 to 2015 in South Korea based on the NHIS-SC data set, and differed between Seoul metropolitan area and other areas.     

Prevalence of Psychiatric Diagnoses and Challenging Behaviors in a Community-Based Population of Adults With Intellectual Disability

Previous research has suggested substantial variation in prevalence rates of psychiatric disorders in individuals with intellectual disability (ID) and also differential patterns of associations between psychiatric disorders and challenging behaviors in people with ID. The aim of this study was to determine the prevalence rate of specific psychiatric disorders and challenging behaviors and the relationship between them in a community-based sample of individuals with ID. A community-based sample of 159 adults primarily with mild and moderate ID was surveyed for the presence of psychiatric disorders and challenging behaviors using the Behavior Problem Inventory and the Psychiatric Assessment Schedule (PAS-ADD). Individuals who met threshold on the PAS-ADD were subsequently evaluated using the Mini PAS-ADD Interview. Screening for psychiatric disorders using the PAS-ADD indicated a prevalence rate of 10%. There was a large discrepancy between the overall rate of challenging behaviors (45%) and the rate of psychiatric disorders identified by the Mini PAS-ADD Interview (6%). However, the rate of more severe behavior problems (8%) was closer to the rate of psychiatric disorders (6%). Thirty-one percent of people with severe challenging behaviors also were rated as having psychiatric disorders and odd ratio analysis indicates that individuals with severe challenging behaviors are substantially more likely to present with a psychiatric disorder. However, the relationship between different topographies of challenging behaviors and discrete diagnostic categories of psychiatric disorders appears to be unclear. This study reports a low prevalence of psychiatric disorders in a community-based population. The presence of severe challenging behaviors appears to have some association with psychiatric disorders but does not appear specific to discrete diagnostic categories. Clinicians and researchers need to debate the validity of considering challenging behaviors atypical manifestations of psychiatric disorders.     

Working criteria of mild cognitive impairment in community: findings from Gwangju Dementia and Mild Cognitive Impairment Study (GDEMCIS)

Introduction: The clinical determination of relative severity of impairment along the spectrum of mild cognitive impairment (MCI) may be valuable for the prediction of dementia. The purpose of the present study is to suggest the working criteria of MCI based on severity in the community sample. Methods: The MCI group was divided into three groups by severity according to cognitive and functional status. The grade I MCI group was based on the original concept of Petersen's MCI. The grade II MCI group was in the same condition as grade I MCI, except that the general cognitive function was not intact. The grade III MCI group was defined as the condition not essentially preserved instrumental to the activity of daily living, but not definite in dementia regardless of general cognitive and functional state. Results: A total of 38.5% of the subjects were classified as not cognitively impaired (NCI), 41.4% as MCI, and 10.3% as having dementia. Preliminary results showed that the grades I, II, and III MCI groups had a tendency to lie between the NCI and dementia groups. Discussion: Prospective cohort studies with clinical correlations are needed to determine whether our working criteria of MCI considering characteristics of the rural elderly, such as low education and less comprehensive activities of daily living (ADL), would be useful.