The use of MMSE to Identify Mild Cognitive Impairment (MCI). A Population-Based Study

Aims:

To evaluate the prevalence of MCI and its subtypes in the Faenza Project, using the Mini-Mental State Examination (MMSE).

Methods:

Subjects living in the municipality of Faenza were clinically assessed. The diagnosis of MCI was achieved according to international criteria using a double-step procedure: first, we excluded subjects with dementia, functional impairment and MMSE< 24, leaving 6,745 persons. Then, the performance in different cognitive domains was considered and scores less than 1.5 standard deviations below the age- and education-adjusted norms on MMSE were settled as cut-offs. Four subtypes were identified: amnestic MCI, single non-memory MCI, multidomains non-amnestic, multidomains amnestic MCI.

Results:

2,720 (40.3%) participants met MCI criteria. Prevalence were 4% (amnestic MCI), 26.5% (single non-memory MCI), 4.4% (multidomains amnestic MCI), and 5.4% (multidomains non-amnestic MCI).

Conclusions:

MCI is common among Italian elderly. In our study prevalence are higher than reported in other population-based studies. The use of MMSE with different operational criteria, diverse sampling and assessment procedure might explain such discrepancy. The role of MMSE to identify persons with mild cognitive deficits deserves concerns. However, MMSE is largely used in both clinical practice and research and has been suggested as a useful screening tool for assessing the degree of cognitive impairment in the guidelines for the Report of the Quality Standards Subcommittee of the American Academy of Neurology.

Cognitive complaints are associated to multi-morbidity in an old population with good cognitive functioning

Introduction

The role of cognitive complaints has recently received increasing attention in dementia research.

Aim

To investigate whether the subjective perception of cognitive deficits is related to multi-morbidity in an old Italian cohort.

Methods

The study population(N = 6,825) included persons who did not receive a diagnosis of dementia(DSM-IIIR criteria), were not cognitively impaired and scored < 4 at the Global Deterioration Scale(GDS). On GDS stage one, Individuals with GDS score equal to one do not report memory problems and no deficits are detected during the interview. In subjects with GDS score = 2, a very mild cognitive decline is appreciable. On GDS score = 3,deficiencies begin to be noted. The examining physicians diagnosed the somatic disorders according to the International Classification Disease version 10 (ICD-10). Mental health was clinically assessed by the examining physicians with semi-structured questions. A multimorbidity index was created based on the number of co-occurring chronic disorders. Binary logistic regression analyses were used to estimate multiadjusted Odds ratio (aOR) and 95% Confidence Intervals (CI).

Results

According to GDS, 28.4% (N = 1,940) of participants reported some degree of perceived cognitive decline. Cognitive complaints were associated with increasing age, low education, and multimorbidity. Stroke (aOR,95%CI 1.6;1.3–1.9),diabetes(aOR,95%CI 1.4;1.1–1.7),depressive(aOR,95%CI 2.2;1.8–2.7) and anxiety symptoms(aOR, 95%CI 1.5;1.3–1.8) were significantly associated with perceived cognitive decline. When performances at MMSE were taken into account, cardiovascular(aOR,95%CI 2.3;1.3–4.1) and respiratory diseases(aOR,95%CI 1.9;1.0–3.6) were associated with self-perceived cognitive decline in absence of observable cognitive deficits.

Conclusions

Cognitive complaints have many somatic correlates and some of them may account for the discrepancy between perceived cognitive decline and cognitive assessment.

Anxiety Syndrome and Somatic Morbidity in an Italian Elderly Population

Aims:

To evaluate anxiety syndrome prevalence and to investigate the association between anxiety and somatic morbidity in a population-based study of elderly: the “Faenza Project” (De Ronchi, 2005).

Methods:

6987 cognitively intact subjects living in the Faenza area (mean age 71,88 years; 59,2% women) underwent semi-structured interviews and were clinically assessed in order to evaluate somatic and mental health status (ICD-10 criteria). Multi-morbidity was defined as the presence of two or more somatic diseases (hypertension, diabetes, dyslipidemia, cardiovascular, gastro-intestinal, endocrine diseases, psychiatric disorders, osteoporosis, Parkinson's disease (PD) and stroke). The association between anxiety and somatic morbidity was calculated by Logistic regression analysis estimating Odds Ratios and 95% Confidence Intervals (OR, 95%CI), adjusting for age, education, gender, marital status, socio-economic status, smoking habits and alcohol consumption.

Results:

The prevalence of anxiety syndrome was 11,1% (8,6% women vs 2,5% men, p< 0.001). Taking into account possible confounders, anxiety syndrome was associated with depressive syndrome (OR,95%CI=4.55,3.73-5.54), osteoporosis (OR, 95%CI=1.37,1.13-1.65), Parkinson's disease (OR,95%CI=4.18,2.55-6.85) and multi-morbitidy (OR,95%CI=1.75,1.46-2.10). When all these conditions were included simultaneously in the logistic model, however, only depressive syndrome and PD were still significantly associated with anxiety: OR,95%CI=4.10,3.22-5.23 and OR, 95%CI=3.02,1.73-5.28 respectively.

Conclusions:

The well known association between depression and anxiety is confirmed in our elderly population independently of other medical factors. Furthermore, a strong association between PD and anxiety resulted independently of co-occurrence of depression.

Depression, Cognitive Impairment, Somatic Complaints and Disability. Data from the “Faenza Community Aging Study”

Aim:

To evaluate the relationship between depression, somatic symptoms, cognitive impairment and disability in an elderly population.

Methods:

216 subjects (65-84 years) were clinically examined for somatic symptoms, and underwent a mental health examination. Depression was defined by Geriatric Depression Scale scores >11/30; cognitive impairment by Mini-Mental State Examination scores < 24/30; functional status by Instrumental Activities of Daily Living Scale. Associations between depression, cognitive impairment or somatic symptoms and disability were evaluated by logistic regression analyses, estimating Odds Ratios (ORs) and 95% confidence intervals (95%CI) adjusted by sex, age, education.

Results:

Disability was common among depressed individuals (OR(95%CI)=3.60(1.63-7.96)) and among cognitively impaired subjects (OR(95%CI)=7.35(3.07-17.60)). An increasing number of somatic complaints increased the probability of functional impairment: compared with presence of 1-2 somatic symptoms, complaint of 3-6 and 7-12 symptoms were related to disability with OR(95%CI)=3.30(1.11-9.80) and OR (95%CI)=4.20 (1.17-15.09) respectively. Distinguishing pain, gastrointestinal, pseudo-neurological and general symptoms, only general somatic symptoms (palpitations, fatigue, sleep disturbances) were associated with disability (OR(95%CI)=1.81(1.25-2.62), independently by medical conditions (OR(95%CI)=1.57(0.98-2.52)). An additive effect toward disability was observed when general somatic complaints and cognitive impairment were co-existing (OR(95%CI)=23.68(5.50-101.86)). Including simultaneously cognitive impairment, somatic complaints and depression in the model, only cognitive impairment was still significantly related (OR(95%CI)=5.87(2.66-12.96)).

Conclusions:

Among many possible causes of disability in the elderly, an important role could be attributed to cognitive deficits.

Suicidal Ideation in Italian Elderly. Preliminar data from the “Faenza Project”

Aims:

To evaluate prevalence rate of suicidal ideation among Italian elderly and to investigate possible socio-demographic and psychopathological features of suicide attempters in a population-based study.

Methods:

461 subjects (mean age 85 years; 52.9% women; 49.2% widow) were interviewed using the Revised Cambridge Examination for Mental Disorders in the Elderly. the presence of suicidal ideation was assessed by the Scale for Suicide Ideation. the association between suicidal ideation and its correlates was analysed by Logistic Regression Model estimating Odds Ratios and 95% Confidence Intervals (OR, 95%CI).

Results:

Eighteen (3,8%) persons refused to answer to questions concerning suicide thoughts. Only one participant declared to have attempted suicide (a 92 years-old men, widow, living on his own and complaining about depressive feelings). Overall suicidal ideation prevalence was 7.3%: wish to die (3.8%) and not worth living (13%). Gender, age, education, marital and socio-economic status were similar in subjects with and without suicidal ideation. Subjects with suicidal ideation had fewer family contacts, were less satisfied of their general health status and had a higher number of depressive and anxiety symptoms. However, when all these conditions were tested in the same model, only depressive symptoms were still significantly associated with suicidal ideation (OR, 95%CI=9.6, 3.3-27.9).

Conclusion:

The worldwide aging of the population deserves attention to psycho-geriatric medicine. Study on suicide in late-life are of interest to detect elderly at risk and to emphasize this increasing phenomenon.

Incidence and etiology of dementia in a large elderly Italian population

OBJECTIVE

To estimate age- and sex-specific incidence of dementia, Alzheimer disease (AD), and vascular dementia (VaD) in the Conselice Study of Brain Aging, an Italian prospective population-based study, and to assess whether poor education is a risk factor for dementia.

METHODS

In 1999 to 2000, the baseline study identified a dementia-free cohort of 937 subjects aged 65 years and older who were reexamined in 2003 to 2004 using a two-phase procedure.

RESULTS

Information was obtained for 91% of the subjects at risk; 115 incident cases of dementia were identified. Incidence rates per 1,000 person-years were 37.8 (95% CI = 30.0 to 47.7) for dementia, 23.8 (95% CI = 17.3 to 31.7) for AD, and 11.0 (95% CI = 7.2 to 16.9) for VaD. This translates into more than 400,000 new cases of dementia expected per year in Italy. Increasing age was an independent risk factor for both AD and VaD. Poor education was an independent risk factor for AD but not VaD. Sex did not affect dementia risk.

CONCLUSIONS

In this Italian population-based cohort, incidence of dementia increased with age, and Alzheimer disease (AD) was the most frequent type of dementia. Poor education was associated with a higher risk of AD. Our incidence rates are higher than previously reported in Italy, and provide new estimates for projection of future burden of disease in Italy.

Blood homocysteine and vitamin B levels are not associated with cognitive skills in healthy normally ageing subjects

Increased plasma total homocysteine (tHcy) levels are a known risk factor for vascular disease and have been reported in association with cognitive impairment of old age. Alternatively, however, increased tHcy levels may simply be an indicator of B vitamin deficiency. We evaluated the relationship between plasma tHcy levels, serum vitamin B12 and folate levels, and the scores at a battery of neuropsychological tests in 54 healthy cognitively normal subjects aged 65 years and over. Hyperhomocysteinemia prevalence (plasma tHcy>15 micromol/L) was about 24%. In univariate analysis, vitamin B12 levels were associated with both verbal memory and visuo-spatial skills, whereas no association was found between psychometric test scores and folate levels or tHcy levels. However, none of the univariate associations of neuropsychological test scores and serum B12 vitamin levels was confirmed when adjusting for age, education and other confounding variables. In conclusion, although a relationship between homocysteine, B vitamins and poor cognitive skills in the elderly is plausible, this study does not suggests that such relationship is biologically important.

The effect of education on dementia occurrence in an Italian population with middle to high socioeconomic status

OBJECTIVE

To explore the relation between education and dementia prevalence by computing the odds ratios (ORs) for different educational levels after adjustment for age, gender, occupational level, and life habits.

METHODS

A two-phase community study including 495 elderly subjects with middle to high socioeconomic status, aged more than 60 years and with a high percentage of noneducated subjects, was carried out in the province of Ravenna, Italy. Dementia and dementia type were clinically diagnosed using DSM-III-R diagnostic criteria.

RESULTS

A higher prevalence of dementia was observed among noneducated subjects of both genders. Comparing no education with any education, the OR (adjusted for age, gender, and occupation) was 4.7 (95% CI = 2.3 to 9.6). The association, although present in all age groups, was extraordinarily strong among the youngest subjects (61 to 69 years) (OR = 139.5, 95% CI = 6.4 to 3,024.6) and decreased with increasing age. Life habits, such as smoking and alcohol consumption as well as current or previous history of hypertension, did not change the results. There was no significant difference in dementia prevalence among less well-educated (up to 3 years of education) and better-educated subjects (more than 3 years of schooling) after age and gender were taken into account. Similar findings were found for Alzheimer's disease and vascular dementia separately.

CONCLUSIONS

Having no education is associated with dementia independent of gender, occupation, life habits, and hypertension. This association was stronger among younger old persons, and decreased with increasing age. The findings suggest that the first decade of life is a critical period for developing dementia later in life. The decrease in dementia risk may be due to schooling, according to the cerebral reserve hypothesis, or to other factors associated with a higher educational level during childhood.