Rosemary Karmel

The Hospital Dementia Services Project: age differences in hospital stays for older people with and without dementia

BACKGROUND People with dementia may have adverse outcomes following periods of acute hospitalization. This study aimed to explore the effects of age upon hospitalization outcomes for patients with dementia in comparison to patients without dementia. METHODS Data extracted from the New South Wales Admitted Patient Care Database for people aged 50 years and over for the period July 2006 to June 2007 were linked to create person-based records relating to both single and multiple periods of hospitalization. This yielded nearly 409,000 multi-day periods of hospitalization relating to almost 253,000 persons. Using ICD-10-AM codes for dementia and other principal diagnoses, the relationship between age and hospitalization characteristics were examined for people with and without dementia. RESULTS Dementia was age-related, with 25% of patients aged 85 years and over having dementia compared with 0.9% of patients aged 50-54 years. People with dementia were more likely to be admitted for fractured femurs, lower respiratory tract infections, urinary tract infections and head injuries than people without dementia. Mean length of stay for admissions for people with dementia was 16.4 days and 8.9 days for those without dementia. People with dementia were more likely than those without to be re-admitted within three months for another multi-day stay. Mortality rates and transfers to nursing home care were higher for people with dementia than for people without dementia. These outcomes were more pronounced in younger people with dementia. CONCLUSION Outcomes of hospitalization vary substantially for patients with dementia compared with patients without dementia and these differences are frequently most marked among patients aged under 65 years.

Potentially preventable complications of urinary tract infections, pressure areas, pneumonia, and delirium in hospitalised dementia patients: retrospective cohort study

Objectives To identify rates of potentially preventable complications for dementia patients compared with non-dementia patients. Design Retrospective cohort design using hospital discharge data for dementia patients, case matched on sex, age, comorbidity and surgical status on a 1 : 4 ratio to non-dementia patients. Setting Public hospital discharge data from the state of New South Wales, Australia for 2006/2007. Participants 426 276 overnight hospital episodes for patients aged 50 and above (census sample). Main outcome measures Rates of preventable complications, with episode-level risk adjustment for 12 complications that are known to be sensitive to nursing care. Results Controlling for age and comorbidities, surgical dementia patients had higher rates than non-dementia patients in seven of the 12 complications: urinary tract infections, pressure ulcers, delirium, pneumonia, physiological and metabolic derangement (all at p<0.0001), sepsis and failure to rescue (at p<0.05). Medical dementia patients also had higher rates of these complications than did non-dementia patients. The highest rates and highest relative risk for dementia patients compared with non-dementia patients, in both medical and surgical populations, were found in four common complications: urinary tract infections, pressure areas, pneumonia and delirium. Conclusions Compared with non-dementia patients, hospitalised dementia patients have higher rates of potentially preventable complications that might be responsive to nursing interventions.

Empirical aspects of record linkage across multiple data sets using statistical linkage keys: the experience of the PIAC cohort study

BackgroundIn Australia, many community service program data collections developed over the last decade, including several for aged care programs, contain a statistical linkage key (SLK) to enable derivation of client-level data. In addition, a common SLK is now used in many collections to facilitate the statistical examination of cross-program use. In 2005, the Pathways in Aged Care (PIAC) cohort study was funded to create a linked aged care database using the common SLK to enable analysis of pathways through aged care services.Linkage using an SLK is commonly deterministic. The purpose of this paper is to describe an extended deterministic record linkage strategy for situations where there is a general person identifier (e.g. an SLK) and several additional variables suitable for data linkage. This approach can allow for variation in client information recorded on different databases.MethodsA stepwise deterministic record linkage algorithm was developed to link datasets using an SLK and several other variables. Three measures of likely match accuracy were used: the discriminating power of match key values, an estimated false match rate, and an estimated step-specific trade-off between true and false matches. The method was validated through examining link properties and clerical review of three samples of links.ResultsThe deterministic algorithm resulted in up to an 11% increase in links compared with simple deterministic matching using an SLK. The links identified are of high quality: validation samples showed that less than 0.5% of links were false positives, and very few matches were made using non-unique match information (0.01%). There was a high degree of consistency in the characteristics of linked events.ConclusionsThe linkage strategy described in this paper has allowed the linking of multiple large aged care service datasets using a statistical linkage key while allowing for variation in its reporting. More widely, our deterministic algorithm, based on statistical properties of match keys, is a useful addition to the linkers toolkit. In particular, it may prove attractive when insufficient data are available for clerical review or follow-up, and the researcher has fewer options in relation to probabilistic linkage.

Transitions from hospital to residential aged care in Australia.

Aim:  To investigate movement of people from hospital into residential aged care.

Alcohol-related cognitive impairment in New South Wales hospital patients aged 50 years and over

Objectives: The aim of this study was to describe the principal reasons for admission, medical comorbidities, interventions and outcomes of patients admitted to New South Wales hospitals with alcohol-related cognitive impairment. Methods: We extracted data from the NSW Admitted Patient Care Database for nearly 410 000 multi-day hospital admissions from 222 public hospitals ending between July 2006 and June 2007 for people aged 50 and over. Data linkage using a unique patient identifier, derived by the Centre for Health Record Linkage identified hospital transfers and readmissions for individual patients. Using ICD10-AM codes, we identified patients with alcohol-related dementia, amnesic syndrome due to alcohol, and Wernickes encephalopathy, their principal reasons for admission and medical comorbidities, and procedures undertaken. Outcomes were length of stay, mortality, discharge destination, and readmission. Results: A total of 462 patients diagnosed with alcohol-related dementia (n = 300; 82% male, mean age 63.9 years), Wernickes encephalopathy (n = 77) or amnesic syndrome due to alcohol (n = 126) were identified with overlap between diagnoses. Alcohol-related dementia occurred in 1.4% of dementia patients, and was more likely to occur in younger age groups and men than other types of dementia. Alcohol-related mental disorder was recorded in 70% of alcohol-related dementia multi-day admissions: dependence (52%), ‘harmful use’ (11%) and withdrawal (12%). Principal reasons for admission for multi-day stays included alcohol-related mental disorder (18%), liver disease (11%) and injuries/poisonings (10%). Medical comorbidity was common. Like other dementia patients, alcohol-related dementia patients had longer length of stay (mean of 15 days) than non-dementia patients and more transfers to residential care (7%). However, mortality was similar to non-dementia patients (5%). Discharge at own risk was high (3.7%). Conclusions: Alcohol-related dementia is a preventable and potentially reversible condition. Investigation of intervention strategies initiated during hospitalization are warranted.

The acute-aged care interface: Exploring the DYNAMICS of 'bed blocking'

Objective:  To understand the dynamics underlying ‘bed‐blocking’ in Australian public hospitals that is frequently blamed on older patients.

Characteristics of rural hospital services for people with dementia: Findings from the Hospital Dementia Services Project

OBJECTIVE To obtain information about aged care services in rural New South Wales public hospitals, and to describe key operational aspects of their service delivery models. DESIGN A mixed methods design was used to combine data collected from: (i) a survey of public hospitals and (ii) qualitative site visits in a sample of eleven rural sites. SETTING Rural public hospitals in NSW, Australia. PARTICIPANTS Qualitative data were collected from multidisciplinary clinicians, managers and community service providers who participated in site visits in 2010 and from surveys of NSW public hospitals in 2009/10 about aged care and dementia services. RESULTS Survey and site visit findings demonstrated that rural hospitals have fewer secure beds for managing patients with disturbed behaviour due to dementia and delirium and fewer speciality aged care staff than metropolitan hospitals. Site visit participants also described how secure environments can aid care for people with dementia even in the absence of clinical specialists. CONCLUSION The care of people with dementia in rural hospitals is constrained by access to specialist aged care staff and the physical environment of the hospital. Clinicians are adept at maximising resources to manage diagnosis and transitions for people with dementia. Further understanding of how key operational aspects of clinical leadership and environmental modifications impact on a range of patient outcomes would be valuable.

Care trajectories through community and residential aged care services: disease effects

ABSTRACT As in other ageing populations, dementia, musculoskeletal conditions and cardiovascular disease affect a high proportion of Australians aged over 65 years, and the prevalence of these conditions increases significantly with age. People with these conditions may need to access a range of care services over time to enable them to remain living in their homes. Many eventually need to move into a nursing home. In contrast to the considerable recent literature on the funding of long-term care systems for population ageing, studies on the care pathways followed by individuals are much less common. This paper explores the effect of disease on use of community care services and nursing homes over time, focusing on people with dementia, cardiovascular disease and musculoskeletal conditions. Care-use transitions are identified using linked administrative client data for a cohort of 33,300 community-living Australians who had an aged care assessment in 2003-04 and who had not previously used aged care services. The different symptoms and courses of diseases meant that the patterns of aged care service use, both in terms of care services accessed and the timing of this access, varied considerably for people with different health conditions. These differences persisted across a range of client characteristics. In particular, people with dementia or cerebrovascular disease as their main health condition were more likely to enter nursing home care than those with heart disease or musculoskeletal conditions. The variation in use of aged care services according to disease group need to be taken into account in any projections of demand for aged care. Such projections must allow for predictions of disease prevalence, or else they will yield inaccurate predictions of demand for both community and residential care.

Hospital Dementia Services Project: Aged care and dementia services in New South Wales hospitals

To describe the availability of aged care and dementia services in public hospitals in New South Wales (NSW), Australia in 2006/2007.

Predicting excess cost for older inpatients with clinical complexity: A retrospective cohort study examining cognition, comorbidities and complications

Background Hospital-acquired complications increase length of stay and contribute to poorer patient outcomes. Older adults are known to be at risk for four key hospital-acquired complications (pressure injuries, pneumonia, urinary tract infections and delirium). These complications have been identified as sensitive to nursing characteristics such as staffing levels and level of education. The cost of these complications compared to the cost of admission severity, dementia, other comorbidities or age has not been established. Method To investigate costs associated with nurse-sensitive hospital-acquired complications in an older patient population 157,178 overnight public hospital episodes for all patients over age 50 from one Australian state, 2006/07 were examined. A retrospective cohort study design with linear regression analysis provided modelling of length-of-stay costs. Explanatory variables included patient age, sex, comorbidities, admission severity, dementia status, surgical status and four complications. Extra costs were based on above-average length-of-stay for each patient’s Diagnosis Related Group from hospital discharge data. Results For adults over 50 who have length of stay longer than average for their diagnostic condition, comorbid dementia predicts an extra cost of A