In September 2009, Montreal, Quebec hosted the International Psychogeriatric Association's 14th International Congress, in collaboration with the American Association for Geriatric Psychiatry, the Canadian Academy of Geriatric Psychiatry, the Canadian Coalition for Seniors' Mental Health, the Canadian Geriatrics Society, and the Société Québecoise de Psychogériatrie. The theme of the Congress was the “Pathway to Prevention”, and the presentations focused on progress made to date on the prevention of late-life mental disorders, barriers the field is still facing, and future achievements that will be needed for this goal to be achieved.

Worldwide, lifespan is lengthening. Concomitantly, late-life dementias are increasingly common, challenging both personal and public health internationally. After age 65, rates of dementia tend to double every five years in developed countries and every seven in developing ones. The late-life dementias, particularly Alzheimer's disease, have profound effects on aging individuals and their caregivers. Multidisciplinary research has explored the potential for various approaches to prevent or delay the onset of late-life dementias. Outlining that research, including our team's Adult Changes in Thought and Kame studies, this review concludes that delaying the onset of these dementias appears feasible, although absolute prevention may not be. Today, the most promising methods appear to include controlling vascular risk factors like hypertension and engaging in physical exercise – and possibly mental exercise. If people can delay the onset of dementias, they can lead more fulfilling lives for longer, spending less time suffering from dementia and letting their families spend less time coping with the disease. It is possible that trends toward more knowledge-based societies, where cognitive health is so vital, may increasingly exert evolutionary pressure favoring larger and healthier brains – and a “compression of cognitive morbidity” – well into old age. Public health's great triumph, increased lifespan, should give more of the world's people the reward of many years of dementia-free life. Rather than the personal difficulties and public health burdens of many years of functional impairment, dependency, and suffering with dementia, some interventions may delay the onset of Alzheimer's disease and other dementias.

Epidemiological studies show a close relationship between physical activity and cognition. A causal relationship between physical activity and cognition has been observed in children, adolescents, older people without dementia, and in older people in a very early stage of dementia. Considering these positive effects, we argue that a decline in physical activity has a detrimental effect on cognition and behavior in patients with dementia. Merely living in a nursing home reduces the level of physical activity. The level of physical activity may even be reduced to a minimum when physical restraints are applied. The use of physical restraints coincides with stress, further aggravating the already existing neuropathology, which may increase stress and agitation even more. Exercise may reduce stress and agitation.

Background: Dementia is now a major public health issue in low- and middle-income countries, and strategies for primary prevention are needed. This study aimed to estimate the proportion of cases of dementia attributable to illiteracy, non-skilled occupation and low income, which are common, potentially modifiable social adversities that occur along the lifespan in low- and middle-income countries.

Methods: This report is based on data from the São Paulo Ageing & Health Study (SPAH) study (N = 2003). All individuals aged 65 years and older residing within pre-defined socially deprived areas of the city of São Paulo, Brazil, were included. The outcome of interest was prevalent dementia. Indicators of socioeconomic position (SEP) were literacy (distal indicator), highest occupational attainment (intermediate indicator), and monthly personal income (proximal indicator). We estimated the proportion of prevalent dementia attributable to each SEP indicator (illiteracy, non-skilled occupations and low income) by calculating their population attributable fractions (PAF).

Results: Dementia was more prevalent amongst participants who were illiterate, had non-skilled occupations and lower income. Illiteracy, poor occupational achievement and low income accounted for 22.0%, 38.5% and 38.5% of the cases of dementia, respectively. There was a cumulative effect of socioeconomic adversities during the lifespan, and nearly 50% of the prevalence of dementia could be potentially attributed to the combination of two or three of the socioeconomic adversities investigated.

Conclusions: Public policies aimed at improving education, occupational skills and income could potentially have a role in primary prevention of dementia. Governments should address this issue in a purposeful and systematic way.

Background: Achieving remission in late-life depressive disorder is difficult; it is far better to prevent depression. In the last ten years there have been a number of clinical studies of the feasibility of prevention.

Methods: A limited literature review was undertaken of studies from 2000 specifically concerning the primary prevention of late-life depressive disorder or where primary prevention is a relevant secondary outcome.

Results: Selective primary prevention (targeting individuals at risk but not expressing depression) has been shown to be effective for stroke and macular degeneration but not hip fracture. It may also prove effective for the depression associated with caregiving in dementia. Emerging evidence finds effectiveness for indicated prevention (in those identified with subthreshold depression often with other risk factors such as functional limitation). Despite a number of promising risk factors (for example, diet, exercise, vascular risk factors, homocysteine and insomnia), universal prevention of late-life depression (acting to reduce the impact of risk factors at the population level) has no current evidence base, although a population approach might mitigate suicide.

Conclusion: Interventions which work in preventing late-life depression include antidepressant medication in standard doses and Problem-Solving Treatment. When integrated into a care model, such as collaborative care, prevention is feasible but more economic studies are needed.

Background: Compensatory strategies (behavioral/environmental modifications) can reduce the difficulties of performing daily living activities, fear of falling, and mortality risk. However, individuals vary in their readiness to use strategies. We examined characteristics associated with readiness to use compensatory strategies, the extent to which level of readiness changed from participation in an intervention (Advancing Better Living for Elders (ABLE)) providing compensatory strategies, and factors predictive of change in readiness level.

Methods: Data from a randomized trial were used. Participants were 148 older adults assigned to the ABLE intervention designed to enhance daily function through compensatory strategy use. Baseline measures included demographic characteristics, functional difficulty level, presence/absence of depressive symptoms, compensatory strategy use, and social support. At initial (2 weeks from baseline) and final (6 months) ABLE sessions, interventionists rated readiness (1 = precontemplation; 2 = contemplation; 3 = preparation; 4 = action/maintenance) of participants to use strategies. Ordinal logistic regression was used to identify baseline characteristics associated with initial readiness rating. A McNemar-Bowker test of symmetry was used to describe change in readiness, and binary logistic regression was used to identify baseline predictors of change in readiness (from initial to final intervention session).

Results: At the initial intervention session, 70.3% (N = 104) scored in pre-action (precontemplation/contemplation, preparation), and 29.7% (N = 44) in action/maintenance. Depressive symptomatology (χ2(2) = 9.08, p = 0.011) and low compensatory strategy use (F(2, 147) = 8.44, p = 0.001) at baseline were associated with lower readiness levels at initial ABLE session. By final ABLE session, most participants demonstrated greater readiness: 72% (N = 105) in action/maintenance, 28% (N = 41) in pre-action (two participants dropped out). A significant baseline predictor of positive change in readiness (from initial to final session) was higher social support levels (b = 0.10, SE = 0.05, Wald = 4.98, p = 0.026).

Conclusion: Whereas presence of depressive symptomatology and lower use of compensatory strategies at baseline were associated with lower readiness at initial intervention session, neither predicted change in readiness level. Thus, mood and prior compensatory strategy use do not effect enhancements in readiness to use strategies provided in an intervention. Baseline social support was the strongest predictor of change in readiness suggesting that interventions may need to involve older adults’ social networks to enhance acceptability of compensatory strategy use.

Background: To compare the frequencies of risk factors, we describe risks for depression as a function of race among consecutively admitted participants in a randomized clinical trial of indicated depression prevention in later life.

Methods: Seventy-two black and 143 white participants were screened for risk factors for depression.

Results: Black participants were more likely to have fewer years of education and lower household income. They were more likely to be obese, live alone, experience functional disability, have a history of alcohol and drug abuse, and have lower scores on the Mini-mental State Examination and the Executive Interview (EXIT). White participants were not found to have greater prevalence or higher mean score on any risk factor. On average, black participants experienced approximately one more risk factor than white participants (t(213) = 3.32, p = 0.0011).

Conclusions: In our sample, black participants had higher frequencies of eight risk factors for depression and a greater mean number of risk factors compared to white participants.

Background: The Sydney Memory and Ageing Study (Sydney MAS) was initiated in 2005 to examine the clinical characteristics and prevalence of mild cognitive impairment (MCI) and related syndromes, and to determine the rate of change in cognitive function over time.

Methods: Non-demented community-dwelling individuals (N = 1037) aged 70–90 were recruited from two areas of Sydney, following a random approach to 8914 individuals on the electoral roll. They underwent detailed neuropsychiatric and medical assessments and donated a blood sample for clinical chemistry, proteomics and genomics. A knowledgeable informant was also interviewed. Structural MRI scans were performed on 554 individuals, and subgroups participated in studies of falls and balance, metabolic and inflammatory markers, functional MRI and prospective memory. The cohort is to be followed up with brief telephone reviews annually, and detailed assessments biannually.

Results: This is a generally well-functioning cohort mostly living in private homes and rating their health as being better than average, although vascular risk factors are common. Most (95.5%) participants or their informants identified a cognitive difficulty, and 43.5% had impairment on at least one neuropsychological test. MCI criteria were met by 34.8%; with19.3% qualifying for amnestic MCI, whereas 15.5% had non-amnestic MCI; 1.6% had impairment on neuropsychological test performance but no subjective complaints; and 5.8% could not be classified. The rate of MCI was 30.9% in the youngest (70–75) and 39.1% in the oldest (85–90) age bands. Rates of depression and anxiety were 7.1% and 6.9% respectively.

Conclusions: Cognitive complaints are common in the elderly, and nearly one in three meet criteria for MCI. Longitudinal follow-up of this cohort will delineate the progression of complaints and objective cognitive impairment, and the determinants of such change.

Background: Prospective studies on the clinical progression of Alzheimer's disease (AD) and its relationship to caregiver burden are needed to improve illness management and use of resources.

Methods: This national, multicenter, observational study evaluated 1235 moderate to severe AD patients under routine care in Spain. Baseline cross-sectional sociodemographic and clinical data, and changes from baseline to month 12 of various neuropsychological tests and clinical ratings, including Blessed Dementia Scale, Mini-mental State Examination (MMSE), Hughes Clinical Dementia Rating sum-of-boxes (CDR-SB), Clinical Global Impression of Change (CGIC) and Zarit Caregiver Burden scales, were recorded and comprehensively analyzed.

Results: Baseline data were in accordance with characteristics consistently reported to influence AD risk regarding anthropometrics, sociocultural features and comorbidities. Significant progressive functional impairments (i.e. in routine activities and essential daily tasks) and cognitive (i.e. MMSE and CDR-SB) impairments were found at month 12. However, patients' behavior and caregivers' burden improved slightly, but significantly, corroborating the major influence of behavioral symptoms on caregivers' distress. Caregivers showed significantly lower burden with patients with higher levels of education and, to a lesser extent, when patients received AD-specific medication. Physicians accurately detected AD clinical evolution as their CGIC ratings significantly correlated with all tests.

Conclusions: These findings reinforce previous AD knowledge and add data on the clinical course of advanced stages of AD. Caregiver burden depended more on patients' behavioral alterations than on their functional or cognitive declines; and it was diminished by their patients having higher levels of education and being treated with AD-specific medications. Research into unexplored factors that might reduce caregiver burden, ultimately benefiting both patients and caregivers, is encouraged.

Background: People with Alzheimer's disease (AD) who present with prominent frontal features such as a dysexecutive syndrome may be difficult to differentiate clinically from subjects with frontotemporal lobar degeneration (FTLD). This study was performed to improve the differential diagnosis between AD and FTLD and to better characterize the AD subgroup with greater executive dysfunction.

Methods: Using a well-defined prospectively studied cohort of cognitively impaired subjects, which included those with AD and with FTLD, we nominated a frontal variant of AD (FvAD) group as those AD subjects with the lowest quartile of scores on the Frontal Assessment Battery (FAB), indicating greatest executive dysfunction, and compared them with the rest of the AD cases (whom we called the AD group) and those with FTLD across several baseline variables including cognitive, functional and behavioral scales. We also compared the changes from baseline for these three groups at 6 and 12 months. Additionally, we controlled for dementia severity by matching AD and FTLD cases on a functional scale, the SMAF, and repeated the same comparisons with these severity-matched groups.

Results: The 114 FvAD subjects had a mean age of 78.1 years and Mini-mental State Examination (MMSE) scores of 16.6, and the (remaining) AD group had a mean age of 78.4 years and MMSE of 22.4. There were 30 FTLD subjects with a mean age at baseline of 70.9 years and a mean baseline MMSE of 23.4. The FvAD group was significantly more severely impaired than the other two groups on all baseline assessments except the behavioral scale, the Neuropsychiatric Inventory (NPI), where there was insignificantly less impairment than in the FTLD group. In the analysis of subjects matched at baseline for functional impairment, the FvAD and FTLD groups were not significantly different on most assessment scales although on the FAB, clock-drawing and MMSE the FvAD subjects were still significantly more impaired. These two severity-matched groups were also similar in other baseline characteristics except for older age and less psychotropic use in the FvAD group. The severity-matched FvAD group was significantly different from the AD group in almost all assessment scales. All three unmatched and matched groups declined similarly over 12 months.

Conclusions: When groups were not matched for baseline severity, the use of the FAB defined a group of AD subjects with greater executive dysfunction that were distinguished from both the remainder of the AD and FTLD subjects in almost all domains except behavioral disturbance and probably were just more severely affected AD subjects. The FAB is thus more useful as a marker of dementia severity than as a scale to detect a frontal variant of AD or to distinguish AD from FTLD. Controlling for severity, however, did allow the definition of a subgroup of AD subjects that more closely resembled FTLD subjects than the remainder of the AD subjects. It is proposed that subjects with dementia presenting with greater executive impairment but without prominent behavioral symptoms are likely to have AD rather than FTLD, especially if they are quite functionally impaired. With time FTLD subjects develop increasing executive dysfunction and increasingly resemble the more severely affected AD subjects.

Background: Currently there is no standardized procedure for recording direct care time of dementia patients in a nursing home. Recording the direct care time, however, provides an important component of both cost estimates for time-dependent reimbursement of nursing activities and for recording the degree of dependency as an outcome measure for the efficiency of new treatment methods for dementia patients. The purpose of this study is thus to develop and validate the “RUD-FOCA” (Resource Utilization in Dementia – Formal Care), based on the RUD lite, as a standardized tool to measure the direct care time actually required in the nursing home.

Methods: Based on four hypotheses, construct validity was tested within a randomized controlled trial in a sample of 148 residents in six German nursing homes. The RUD-FOCA records the care time in three areas: activities of daily living (ADL), instrumental activities of daily living (IADL) and supervision. For validation, the residents’ capabilities were examined using the Barthel Index, the Nurses’ Observation Scale on Geriatric Patients (NOSGER), the Alzheimer Disease Assessment Scale (ADAS), the Erlangen Test on Activities of Daily Living (E-ADL) and the Mini-mental State Examination (MMSE). The hypotheses assume relationships between the time required for care in the three areas and the limitations involved in these areas. The retest reliability was also determined.

Results: ADL care accounts for two-thirds of total care time in the homes. The hypotheses which refer to total time, ADL and supervision are supported by differentiated correlation profiles. The IADL hypothesis is not supported owing to even, low correlations. The retest reliability was r = 0.76 for the entire care time.

Conclusions: Overall time and the times for ADL care and supervision can be considered valid estimates. The validity is lowest for recording IADL times. Thus, the RUD-FOCA is suitable as an instrument to determine the direct care time in the nursing home. Recording IADL times should be improved by detailed operationalization.

Background: The issue of using advanced tracking technologies such as Global Positioning Systems (GPS) is part of a wider debate on the acceptability of assistive technology to older people with dementia. The use of GPS can enhance the personal safety of older people by alerting caregivers to potential dangers or adverse events that might threaten the individual's health and safety, but at the same time it raises ethical concerns. This study examines the attitudes of cognitively intact older people toward the use of tracking devices for people with dementia.

Methods: The analysis is based on quantitative data from a convenience sample (n = 42) and qualitative data gathered from two focus groups of cognitively intact older people in Israel.

Results: Whereas cognitively intact older people clearly differentiate between themselves and people with dementia, they support the use of tracking devices when dementia is either formally diagnosed or its signs are evident. They value the safety of people with dementia above preserving their autonomy. Although they perceive the decision to use tracking devices as an intra-family issue, they expect guidance from professional caregivers of people with dementia. The acceptability of tracking devices is dependent on their appropriate weight, size and ease of use.

Conclusions: Cognitively intact older people favor the idea of tracking people with dementia. To facilitate family decision-making on the use of tracking devices, structured meetings guided by professionals and including persons with dementia and their family caregivers are suggested.

Background: The relationship between care recipients’ depressive symptoms and those of caregivers remains unknown. We evaluated the association between the depressive status of caregivers and that of community-dwelling disabled care recipients.

Methods: A prospective cohort study of 893 care recipients and paired caregivers was conducted. The care recipients were all eligible for a universal-coverage long-term care insurance program and their ages ranged from 65 to 104 years. They and their paired caregivers (age range 31–90 years) completed the 15-item Geriatric Depression Scale (GDS-15, score range: 0–15) assessment at baseline. The GDS-15 was used to measure the depression of caregivers and recipients with a threshold of <6/6+. The data included each care recipient's demographic characteristics, overall health status, basic activities of daily living, and comorbidities. The data also included the caregiver's demographic characteristics, including the caregiver's relationship to the recipient, and the caregiver's subjective burden as assessed by the Japanese version of the Zarit Burden Interview (ZBI).

Results: The mean GDS-15 scores of care recipients and caregivers were 6.7 points and 5.6 points, respectively. There was a positive correlation between the GDS-15 scores of caregivers and care recipients (r = 0.307, p<0.001). Multivariate logistic regression analysis adjusting for potential confounders including ZBI score indicated that the depressive symptoms of caregivers were associated with those whose care recipients were in the groups with moderate and high GDS-15 scores (OR: 1.97, 95% CI: 1.39–2.81, OR: 3.13, 95% CI: 1.87–5.24, respectively).

Conclusion: Caregivers’ depressive symptoms are associated with the depressive mood of the care recipients even after adjusting for confounders including caregiver burden.

Background: Investigations of mental health literacy are important because the recognition of a mental health problem is the first step in seeking appropriate mental health care. Lack of recognition is a significant barrier to accessing mental health resources. Older Chinese immigrants are at increased risk for depression; however, there is no research investigating their depression literacy, including their beliefs about treatment, etiology, and prognosis.

Methods: This study investigated depression literacy among 53 older Chinese immigrants in Canada (aged 55–87 years) and compared their literacy to Canadian-born participants of the same age who were part of a larger population-based survey. Depression literacy was assessed through interviews using a case vignette and included the following indices: rates of correct identification of depression; perceived efficacy of various people, professions and treatments; and perceptions of etiology and prognosis.

Results: In the Chinese sample, 11.3% correctly identified depression in the case vignette. In contrast, 74.0% of participants in the population-based survey correctly identified depression. Differences in the perceptions of helpful people and interventions, etiology, and prognosis were also noted between the samples. Both samples strongly endorsed physical activity as helpful in the treatment of depression.

Conclusions: In light of these results, it is clear that older Chinese immigrants would benefit from information regarding the symptoms, etiology, and treatment of depression, and that this information may begin to address the serious underutilization of mental health services among this group. Our discussion highlights practice implications and promising interventions.

Background: Hospital-treated deliberate self harm and suicide among older adults have rarely been examined at a national level.

Methods: The Irish Central Statistics Office provided suicide and undetermined death data for 1980–2006. The National Registry of Deliberate Self Harm collected data relating to deliberate self harm presentations made in 2006–2008 to all 40 Irish hospital emergency departments.

Results: Rates of female suicide among older adults (over 55 years) were relatively stable in Ireland during 1980–2006 whereas male rates increased in the 1980s and decreased in more recent decades. Respectively, the annual male and female suicide and undetermined death rate was 22.1 and 7.6 per 100,000 in 1997–2006. Male and female deliberate self harm was 3.0 and 11.0 times higher at 67.4 and 83.4 per 100,000, respectively. Deliberate self harm and suicide decreased in incidence with increasing age. Deliberate self harm generally involved drug overdose (male: 72%; female 85%) or self-cutting (male: 15%; female 9%). The most common methods of suicide were hanging (41%) and drowning (29%) for men and drowning (39%) and drug overdose (24%) for women. City and urban district populations had the highest rates of hospital-treated self harm. The highest suicide rates were in urban districts.

Conclusions: Older Irish adults have high rates of hospital-treated deliberate self harm but below average rates of suicide. Drowning was relatively common as a method of suicide. Restricting availability of specific medications may reduce both forms of suicidal behavior.

Background: National attitudes towards the elderly and their association with elderly suicide mortality in 26 European countries were assessed, and Eastern and Western European countries compared.

Methods: For each country, mean age-adjusted, gender-specific elderly suicide rates in the last five years for which data had been available were obtained from the WHO European Mortality Database. Questions about citizens’ attitudes towards the elderly were taken from the European Social Survey. Correlations between attitudes and suicide rates were analyzed using Pearson's test. Differences between mean scores for Western and Eastern European attitudes were calculated, and data on labor-market exit ages were obtained from the EUROSTAT database.

Results: Perception of the elderly as having higher status, recognition of their economic contribution and higher moral standards, and friendly feelings towards and admiration of them are inversely correlated with suicide mortality. Suicide rates are lower in countries where the elderly live with their families more often. Elderly suicide mortality and labor-market exit age are inversely correlated. In Eastern European countries, elderly people's status and economic contribution are seen as less important. Western Europeans regard the elderly with more admiration, consider them more friendly and more often have elderly relatives in the family. The data also show gender differences.

Conclusions: Society's attitudes influence elderly suicide mortality; attitudes towards the elderly are more favorable among Western European citizens; and extended labor-market inclusion of the elderly is a suicide-protective factor.

Background: Several neuropsychiatric symptoms observed in elders with cognitive impairment no dementia (CIND) can be part of a major depressive episode (MDE) or a “subthreshold” depressive episode. Certain neuropsychiatric symptoms of CIND are essential symptoms of MDE (e.g. dysphoria, anhedonia), while other are non-essential symptoms (NESD; e.g. fatigue, insomnia, cognitive complaint). Contrary to essential symptoms, NESD are not specific to MDE and are present in other disorders. It is unknown whether NESD are linked to CIND in absence of MDE or subthreshold MDE. The present study examined the association between NESD and probable CIND in elders without essential MDE symptoms.

Methods: Participants were 2028 community-dwelling individuals aged 65–96 years who had not experienced dysphoria/anhedonia during the year preceding the interview. Semi-structured in-home interviews evaluated the following NESD: alteration of appetite, sleep disturbance, psychomotor alteration, fatigue/loss of energy, worthlessness/guilt, and cognitive complaints. Probable CIND cases were defined based on the Mini-mental State Examination cut-offs (15th percentile) stratified for age, education and sex.

Results: Symptoms of fatigue/loss of energy (OR: 2.41, 95% CI: 1.42–4.09), sleep disturbance (OR: 3.04 CI: 1.69–5.46) and cognitive complaints (OR: 2.86 CI: 1.71–4.77) were significantly associated with CIND. These associations were not modified after adjustments for potential confounders (age, education level, sex, benzodiazepine use, chronic diseases, and brain disorders).

Conclusion: A psychiatric symptomatology occurs in older adults with CIND in the absence of MDE or subthreshold MDE. NESD encountered in the absence of dysphoria/anhedonia should receive particular attention by clinicians since they can be linked to cognitive difficulties.

Background: This study is the first to explore the relations between attachment styles, ageism, and quality of life (QoL) among elderly people. The attachment theory describes how human beings relate to each other, according to their attachment style. Previous studies have examined the connection between attachment styles and prejudice toward distinctive social groups and minorities. Ageism as a form of prejudice is a way of relating negatively to people because they are old. QoL among the elderly was found to be associated with negative age-perceptions. It was therefore hypothesized that QoL, attachments styles, and demographic characteristics can explain ageism among the elderly.

Methods: Four questionnaires were administered: Fraboni Scale of Ageism (FSA), which comprises four scales (separation, affective, stereotype, and intergeneration); Experiences in Close Relationships Scale, which measures four attachment styles (secure, dismissive, fearful, and preoccupied); SF-36 health status inventory (eight scales); and sociodemographic questions. Ninety-four elderly men and women aged 64–85 years living in the community completed the questionnaires.

Results: MANCOVAS indicated that securely attached individuals score higher on separation than fearfully attached individuals, and that securely and dismissively attached individuals score higher than fearful and preoccupied individuals on seven QoL scales. Multiple regression analyses showed that attachment styles, age, gender, and some QoL scales contribute to the explained variance of ageism.

Conclusions: Secure attachment in late life seems to be related to less ageism and a better QoL. The enhancement of a secure attachment base in elderly people may assist in moderating ageism and improving older people's QoL.

The authors regret an error they made in the Results section of the Abstract. The sentence beginning “MANCOVAS indicated that securely attached individuals score higher than fearfully attached indivduals” should read: “MANCOVAS indicated that securely attached individuals score lower than fearfully attached indivduals.”

On the title page, the authors' affiliations need to be reversed. The first author is affiliated to the Gerontology Department at the School of Arts, Sciences and Humanities (EACH), University of São Paulo, and the remaining authors are affiliated to the Psychogeriatric Unit, Laboratory of Neuroscience (LIM 27), Department and Institute of Psychiatry, Faculty of Medicine, University of São Paulo.