Early assessment, diagnosis and disclosure

Assessing people for dementia, making a diagnosis of dementia and disclosing the diagnosis falls within the remit of medical and nursing professionals in a variety of settings. Published articles on the topic of assessment, diagnosis and disclosure of dementia on the island of Ireland include a focus on the attitudes of GPs in the primary care setting in comparison to their Swedish counterparts and the role played by public health nurses in detecting suspected cases of dementia. Moving away from the primary care setting, a separate study provided an update on the number of memory clinics in ROI and raised several questions in relation to their role in dementia diagnosis, assessment and disclosure, whilst another drew on data collected at a specialist memory clinic within an intellectual disability service. The growing support for early diagnosis and availability of predictive testing for some forms of dementia provided the context for two studies; one on the preferences of older people for early diagnosis, disclosure and screening for Alzheimer’s disease and the other on the uptake of predictive testing for Huntington disease, a rare form of dementia. New methodologies or measures for identifying people with dementia or in the prodromal stages of dementia were tested in several studies. 

Normative CERAD-NP Performance among Community-Dwelling Older Adults in Ireland

MURPHY, M
Clinical Gerontologist
2012

Highlighting the need for good dementia screening tools, Murphy (2012) aimed to provide normative data for the Consortium to Establish a Registry for Alzheimer’s Disease Neuropsychological (CERAD-NP; Morris et al., 1989) test battery, derived from an Irish-based sample.

This test battery has been found effective in distinguishing between Alzheimer’s disease, dementia, mild cognitive impairment and normal ageing. Ninety-nine participants deemed cognitively normal (MMSE=23 or above) undertook the battery of tests and results were then spilt according to education and age. No significant relationship between age and cognitive performance was found. In line with other studies there were some differences between lower and higher education levels supporting the concept of cognitive reserve related to higher education.  While norms in the Irish sample are generally in line with the US and Australia, a significant difference is found in the test, confrontational naming. The mean of the Irish sample is more than one standard deviation less than US and Australian samples, and over two standard deviations lower for the more highly educated categories.  The authors suggest that item familiarity is important and that local and cultural norms should be considered for this test. The authors conclude that CERAD-NP norms generated for US and Australian samples can be used in Ireland with the exception of confrontational naming.

Everyday episodic memory in amnestic mild cognitive impairment: a preliminary investigation

IRISH, M., LAWLOR, B.A., COEN, R.F., O’MARA, S.M.
BMC Neuroscience
2011

In their study, Irish et al.

(2011) aimed to characterise the nature of the memory impairment in MCI (using experimental tasks probing multiple domains of episodic memory function, including associative, spatial and everyday memory tasks that are analogues of real-world scenarios and are commonly encountered by individuals in their daily lives) and to obtain preliminary data regarding which of these tasks, if any, could potentially serve as an aid to identifying individuals with MCI in the prodromal stages of AD. Longitudinal follow-up data suggested that delayed associative memory performance at baseline may have some predictive utility for subsequent conversion to probable AD. This suggests that a simple Face-Name pairs test may have the potential to be a useful neuropsychological task for identifying individuals in the prodromal stage of AD. 

Orientation to time as a guide to the presence and severity of cognitive impairment in older hospital patients

O’KEEFE, E., MUKHTAR, O., O’KEEFE, S.T.
Neurosurgery and Psychiatry
2011

Given the poor recognition of dementia and delirium in acute hospital setting and that disorientation to time is a very common feature of dementia and delirium, O’Keefe, Mukhtar and O’Keefe (2011) examined temporal orientation and its usefulness as a guide to the presence of deme

ntia or delirium among older in-patients and out-patents of an acute hospital in ROI. Of the 262 patients assessed on the same day by two different doctors, almost one-quarter were found to have dementia or delirium. The authors conclude that temporal orientation, properly recorded and interpreted, may provide a useful screening test for dementia or delirium in older hospital patients. 

Anxiety and behavioural disturbances as markers of prodromal Alzheimer’s disease in patients with mild cognitive impairment

GALLAGHER, D., COEN, R., KILROY, D., BELINSKI, K., BRUCE, I., COAKLEY, D., WALSH, J.B., CUNNINGHAM, C., LAWLOR, B.A.
International journal of geriatric psychiatry
2011

In another article concerned with predicting conversion of MCI to Alzheimer’s disease, Gallagher et al. (2011) followed 169 patients with MCI over 27 months, 69 (43%) of whom converted to Alzheimer’s disease.

Neuropsychiatric symptoms were assessed with the Behavioural Pathology in Alzheimer’s disease (BEHAVE-AD) rating scale. Survival analysis revealed that patients with MCI who had symptoms of anticipated anxiety and purposeless activity were approximately twice as likely to have earlier conversion to Alzheimer’s disease than patients with MCI who did not have these symptoms. This finding was independent of age, gender and education. However, since this finding was not independent of cognitive status at baseline, it may be, as the authors conclude, that the neuropsychiatric symptoms of anticipated anxiety and purposeless activity are markers of severity of disease rather than independent predictors of disease progression.    

Detecting prodromal Alzheimer’s disease in mild cognitive impairment: utility of the CAMGOG and other neuropsychological predictors

GALLAGHER, D., MHAOLAIN, A., COEN, R., WALSH, C., KILROY, D., BELINSKI, K., BRUCE, I., COAKLEY, D., WALSH, J.B., CUNNINGHAM, C., LAWLOR, B.A
International journal of geriatric psychiatry
2010

Gallagher et al.

(2010) tested the usefulness of the Cambridge cognitive examination (CAMCOG), a well-established and widely used mini-neuropsychological battery, in detecting prodromal Alzheimer’s disease, and in particular which subtests of CAMCOG are predictive of conversion from mild cognitive impairment (MCI) to Alzheimer’s disease. The study compared CAMCOG and its subtests with an extended version of the delayed word recall (DWR) test. They followed 182 patients with MCI over a mean duration of 26 months, during which 75 (41%) converted to Alzheimer’s disease. The study found that tests of episodic memory were most predictive of conversion to Alzheimer’s disease and the composite memory score contained within CAMCOG was superior to tests of other cognitive domains assessed in CAMCOG. While the DWR test achieved the best predictive accuracy of conversion from MCI to Alzheimer’s disease, the CAMCOG composite memory score perfomed similarly well.  

Which part of the Quick mild cognitive impairment screen (Qmci) discriminates between normal cognition, mild cognitive impairment and dementia?

O’CAOIMH, R., GAO, Y., GALLAGHER, P.F., EUSTACE, J., MCGLADE, C., MOLLOY, D. W.
Age and Ageing
2013

Differentiating MCI from normal cognition and dementia was the topic of an article by O’Caoimh et al. (2013) who tested the assessment tool, Qmci.

They were interested in comparing the sensitivity and specificity of the subtests of the Qmci to determine which were best in differentiating MCI from normal cognition and dementia. They were also keen to refine and shorten the instrument. 

The under-detection of cognitive impairment in Nursing Homes in the Dublin Area: The need for on-going cognitive assessment.

CAHILL, S., DIAZ-PONCE, A., COEN, R.F., WALSH, C.
Age and Ageing
2010

While it is known that the majority of people residing in long-stay care settings are likely to have dementia, it is not known how many actually receive a formal diagnosis of dementia. Cahill et al.

(2010) sought to address this gap, and at the same time test a methodology for detecting dementia among residents in long-stay care settings. A sample of 100 residents drawn from across four different nursing homes in Dublin was screened for cognitive impairment using MMSE and MoCA. One-third of the sample (32) had already received a diagnosis of dementia. However, a large proportion was first identified during the screening as having either a mild, moderate or severe cognitive impairment. Given that some of these residents are likely to have dementia, the study points to the under-detection of dementia in long-stay care settings in ROI and highlights the need for on-going assessment. 

A prospective 14-year longitudinal follow-up of dementia in persons with Down syndrome

MCCARRON, M., NCCAILLON, P., REILLY, E., MULRYAN, N.
Journal of Intellectual Disability Research
2014

McCarron et al. (2014) report on a prospective longitudinal study of a convenience sample of people with Down syndrome (DS) attending a memory clinic within an Intellectual Disability service in Dublin.

Seventy-seven women with DS over the age of 35 were enrolled and assessed in a specialist memory clinic service for symptoms of dementia on an annual basis until death. Over a 14 year follow-up period it was found that almost 90% of the women had developed dementia. The mean age at which they developed dementia was 55 years. The study also assessed for co-morbidities and found that epilepsy was significantly more common in those with DS and dementia. 

Screening for Alzheimer’s disease in Downs Syndrome

O’CAOIMH, R., CLUNE, Y., MOLLEY, W.D.
Journal of Alzheimer’s Disease and Parkinsonism
2013

O’Caoimh, Clune and Molloy (2013) review instruments that are commonly used to screen for Alzheimer’s disease and explore the unique challenges of screening for the presence of Alzheimer’s disease in persons with Down syndrome.

The paper concludes that single, one-dimensional screening tools and opportunistic evaluations are insufficient for detecting dementia in persons with Down syndrome. The paper argues that a better approach is to use batteries of tests, incorporating informant questionnaires, direct neuropsychological testing, assessment of activities of daily living and behaviours, measured at baseline and reassessed at intervals. 

A national survey of memory clinics in the Republic of Ireland

CAHILL, S., PIERCE, M., MOORE, V.
International Psychogeriatrics
2014

Cahill et al. (2014) provided information at a national level on the organization, location, resourcing, staff composition, treatments, waiting time, and numbers of patients attending 14 memory clinics in ROI for the year 2011.

They raised several questions about the goals and outcomes of memory clinics services, questions that are relevant to many countries around the world currently developing and expanding diagnostic and post-diagnostic services to address the increasing prevalence of dementia. 

The personal impact of disclosure of a dementia diagnosis: a thematic review of the literature

MITCHELL, G., MCCOLLUM, P., MONAGHAN, C.
British Journal of Neuroscience Nursing
2013

The effects of disclosing the diagnosis to a person with dementia was the subject matter of a literature review conducted by Mitchell et al. (2013).

Only studies from the perspective of the persons with dementia were included and the majority (11/12) were framed within a naturalistic paradigm. The review findings show that feelings experienced by people recently given a diagnosis of dementia ranged from anxiety or fear to relief or the enablement of future planning. The perceived stigma surrounding a diagnosis of dementia was evident in the majority of studies in the review, as was the impact of losing the freedom to drive. 

Uptake of Huntington disease predictive testing in a complete population

MORRISSON, P.J., HARDING-LESTER, S., BRADLEY, A
Clinical Genetics: An International Journal of Genetics, Molecular and Personalized Medicine
2014

Predictive or pre-symptomatic testing for Huntington disease, an inherited disease and one of the rarer causers of dementia, was the subject of an article by Morrison.

et al (2014), which using the Northern Ireland Huntington disease register estimated that the uptake of pre-symptomatic HD testing in a total population ranged from 12.3% to 14.6%, 10 years into a population testing protocol, and at 14.7% after 20 years of running a predictive testing programme.

Preferences of older people for early diagnosis and disclosure of Alzheimer’s disease (AD) before and after considering potential risks and benefits

ROBINSON, S., CANAVAN, M., O’KEEFFE, S.T.
Archives of Gerontology and Geriatrics
2014

Robinson et al. (2014) examined the preferences of older people for early diagnosis, disclosure and screening for Alzheimer’s disease.

Participants responded to one question each on diagnosis, disclosure and screening, which was followed by a brief discussion of the positive and negative factors that might be considered when deciding whether or not they would want investigation to see if they had AD or would want to be told that they have the condition. Participants were then asked to respond to the three initial questions again. The study findings support previous research suggesting that most people want to ‘know’ if they have dementia. However, the study reveals important differences in preferences for diagnosis, disclosure and screening. The main conclusion is that preferences differ depending on the question asked and preferences change when people are given the opportunity to consider the consequences. 

Prevalence of frailty-related risk factors in older adults seen by community nurses

BALLARD, J., MOONEY, M., DEMPSEY, O.
Journal of Advanced Nursing
2013

This study by Ballard et al. (2013) describes the frequency of four frailty-related risk factors in a cohort of older adults visited by public health nurses in Dublin, ROI.  Suspected cognitive impairment was one of the frailty risk factors.

The other three were risk of malnutrition, falling, and dependence in ADL. The prevalence of suspected cognitive impairment, measured using the Hodkinson’s Abbreviated Mental Test, was found to be 16.4%, comparable to similar international studies. The study suggests that there is a need to implement a valid and standardised screening tool for use by public health nurses to help them identify older people with suspected cognitive impairment with a view to referral for further assessment for dementia or to rule out other causes negatively affecting memory such as vitamin B deficiency, thyroid disorders, depression, and delirium. 

Diagnosis and disclosure of dementia – A comparative qualitative study of Irish and Swedish General Practitioners

MOORE, V., CAHILL, S.
Aging and Mental Health
2013

A cross-country study by Moore and Cahill (2013) explored the attitudes of a convenience sample of nine GPs in ROI and Sweden to dementia diagnosis and disclosure.

It found that GPs largely relied on patients or their families to bring memory problems to their attention, with some GPs expressing reluctance at broaching the subject with them. GPs in both countries reported avoiding using the word ‘dementia’ in conversations with their patients. GPs in ROI were less likely than their counterparts in Sweden to have received specialist training in dementia. There was a marked difference between GPs in ROI and Sweden with regard to their satisfaction with the quantity and quality of community care services. In both countries, GPs believed that societal misunderstandings of dementia are still widespread, so much so that dementia continues to be a stigmatised condition.