Delirium symptoms and low dietary intake in older inpatients are independent predictors of institutionalization: a 1-year prospective population-based study

Dietary assessment methods for measurement of oral intake in acute care and critically ill hospitalised patients: a scoping review

Quantification of oral intake within the hospital setting is required to guide nutrition care. Multiple dietary assessment methods are available, yet details regarding their application in the acute care setting are scarce. This scoping review, conducted in accordance with JBI methodology, describes dietary assessment methods used to measure oral intake in acute and critical care hospital patients. The search was run across four databases to identify primary research conducted in adult acute or critical care settings from 1st of January 2000-15th March 2023 which quantified oral diet with any dietary assessment method. In total, 155 articles were included, predominantly from the acute care setting (n = 153, 99%). Studies were mainly single-centre (n = 138, 88%) and of observational design (n = 135, 87%). Estimated plate waste (n = 59, 38%) and food records (n = 43, 28%) were the most frequent assessment methods with energy and protein the main nutrients quantified (n = 81, 52%). Validation was completed in 23 (15%) studies, with the majority of these using a reference method reliant on estimation (n = 17, 74%). A quarter of studies (n = 39) quantified completion (either as complete versus incomplete or degree of completeness) and four studies (2.5%) explored factors influencing completion. Findings indicate a lack of high-quality evidence to guide selection and application of existing dietary assessment methods to quantify oral intake with a particular absence of evidence in the critical care setting. Further validation of existing tools and identification of factors influencing completion is needed to guide the optimal approach to quantification of oral intake in both research and clinical contexts.

A Lethal Combination of Delirium and Overcrowding in the Emergency Department

Delirium is a common public health concern that significantly impacts older patients admitted to the Emergency Department (ED). This condition is linked to adverse outcomes such as reduced long-term functionality, higher mortality rates, extended hospital stays, and increased medical costs. The identification of risk factors is crucial for the early recognition and management of delirium in ED patients. Aging, cognitive decline, polypharmacy, and sensory impairment are some of the most common general risk factors described in the literature. Although validated delirium assessment tools already exist, they are not practical for the fast-paced ED environment because of their extended evaluation period or specialized training request. Moreover, clear guidance is needed to select the most suitable tool for detecting delirium, balancing between the accuracy and the swiftness required in an overcrowded, high-stress, and understaffed healthcare setting. This narrative review aims to analyze the updated literature on delirium risk factors in older ED patients and focuses on the methods for better screening, managing, and treating this condition in the ED.

Understanding health-care outcomes of older people with cognitive impairment and/or dementia admitted to hospital: a mixed-methods study

Background

Cognitive impairment is common in older people admitted to hospital, but previous research has focused on single conditions.

Objective

This project sits in phase 0/1 of the Medical Research Council Framework for the Development and Evaluation of Complex Interventions. It aims to develop an understanding of current health-care outcomes. This will be used in the future development of a multidomain intervention for people with confusion (dementia and cognitive impairment) in general hospitals. The research was conducted from January 2015 to June 2018 and used data from people admitted between 2012 and 2013.

Design

For the review of outcomes, the systematic review identified peer-reviewed quantitative epidemiology measuring prevalence and associations with outcomes. Screening for duplication and relevance was followed by full-text review, quality assessment and a narrative review (141 papers). A survey sought opinion on the key outcomes for people with dementia and/or confusion and their carers in the acute hospital (n = 78). For the analysis of outcomes including cost, the prospective cohort study was in a medical admissions unit in an acute hospital in one Scottish health board covering 10% of the Scottish population. The participants (n = 6724) were older people (aged ≥ 65 years) with or without a cognitive spectrum disorder who were admitted as medical emergencies between January 2012 and December 2013 and who underwent a structured nurse assessment. ‘Cognitive spectrum disorder’ was defined as any combination of delirium, known dementia or an Abbreviated Mental Test score of < 8 out of 10 points. The main outcome measures were living at home 30 days after discharge, mortality within 2 years of admission, length of stay, re-admission within 2 years of admission and cost.

Data sources

Scottish Morbidity Records 01 was linked to the Older Persons Routine Acute Assessment data set.

Results

In the systematic review, methodological heterogeneity, especially concerning diagnostic criteria, means that there is significant overlap in conditions of patients presenting to general hospitals with confusion. Patients and their families expect that patients are discharged in the same or a better condition than they were in on admission or, failing that, that they have a satisfactory experience of their admission. Cognitive spectrum disorders were present in more than one-third of patients aged ≥ 65 years, and in over half of those aged ≥ 85 years. Outcomes were worse in those patients with cognitive spectrum disorders than in those without: length of stay 25.0 vs. 11.8 days, 30-day mortality 13.6% vs. 9.0%, 1-year mortality 40.0% vs. 26.0%, 1-year mortality or re-admission 62.4% vs. 51.5%, respectively (all p < 0.01). There was relatively little difference by cognitive spectrum disorder type; for example, the presence of any cognitive spectrum disorder was associated with an increased mortality over the entire period of follow-up, but with different temporal patterns depending on the type of cognitive spectrum disorder. The cost of admission was higher for those with cognitive spectrum disorders, but the average daily cost was lower.

Limitations

A lack of diagnosis and/or standardisation of diagnosis for dementia and/or delirium was a limitation for the systematic review, the quantitative study and the economic study. The economic study was limited to in-hospital costs as data for social or informal care costs were unavailable. The survey was conducted online, limiting its reach to older carers and those people with cognitive spectrum disorders.

Conclusions

Cognitive spectrum disorders are common in older inpatients and are associated with considerably worse health-care outcomes, with significant overlap between individual cognitive spectrum disorders. This suggests the need for health-care systems to systematically identify and develop care pathways for older people with cognitive spectrum disorders, and avoid focusing on only condition-specific pathways.

Future work

Development and evaluation of a multidomain intervention for the management of patients with cognitive spectrum disorders in hospital.

Study registration

This study is registered as PROSPERO CRD42015024492.

Funding

This project was funded by the National Institute for Health Research (NIHR) Health Services and Delivery Research programme and will be published in full in Health Services and Delivery Research; Vol. 9, No. 8. See the NIHR Journals Library website for further project information.

The Prevention of Delirium system of care for older patients admitted to hospital for emergency care: the POD research programme including feasibility RCT

Background

Delirium is a distressing, common and serious condition in older people in hospital. Evidence suggests that it could be prevented in about one-third of patients using multicomponent interventions targeting delirium risk factors, but these interventions are not yet routinely available in the NHS.

Objective

The objective was to improve delirium prevention for older people admitted to the NHS.

Design

Project 1 comprised case studies employing qualitative methods (observation, interviews, workshops) in three NHS hospitals to develop the Prevention of Delirium system of care. Project 2 comprised case studies using mixed methods in five NHS hospitals to test the Prevention of Delirium implementation, feasibility and acceptability, and to modify the Prevention of Delirium system of care. Project 3 comprised a multicentre, cluster randomised, controlled, pragmatic feasibility study in eight hospitals, with embedded economic evaluation, to investigate the potential clinical effectiveness and cost-effectiveness of the Prevention of Delirium system of care, compared with standard care, among older patients admitted to hospital for emergency care. The primary objectives related to gathering information to design a definitive trial. Criteria for progression to a definitive trial were as follows: a minimum of six wards (75%) completing the Prevention of Delirium manual milestone checklist and an overall recruitment rate of at least 10% of the potential recruitment pool.

Setting

This study was set in NHS general hospitals.

Participants

In project 1, participants were staff, volunteers, and patient and carer representatives. In project 2, participants were staff, volunteers, patients and carers. In project 3, participants were older patients admitted to elderly care and orthopaedic trauma wards.

Intervention

The developed intervention (i.e. the Prevention of Delirium system of care).

Main outcome measures

For the feasibility study (project 3), the primary outcome measure was the Confusion Assessment Method. The secondary outcome measures were the Nottingham Extended Activities of Daily Living scale, the Clinical Anxiety Scale and the Geriatric Depression Scale Short Form.

Results

Project 1: understanding of delirium prevention was poor. Drawing on evidence, and working with ward teams, we developed the Prevention of Delirium system of care, which targeted 10 delirium risk factors. This multicomponent intervention incorporated systems and mechanisms to introduce and embed delirium prevention into routine ward practices. Project 2: five out of six wards implemented or partially implemented the Prevention of Delirium intervention. A prominent role for hospital volunteers was intended, but most wards were unable to recruit or sustain the numbers needed. We identified four conditions necessary to implement and deliver the Prevention of Delirium intervention: (1) commitment of senior nurse, (2) a named person to drive implementation forward, (3) dedicated time (1 day per week) of an experienced nurse to lead implementation and (4) adequate ward staffing levels. Overall, the intervention was acceptable to staff, volunteers, patients and carers, and did not increase nursing staff workload. In the light of these findings, the Prevention of Delirium system of care was modified for use in project 3. Project 3: 16 wards in eight hospitals (two wards per hospital) were recruited. Out of 4449 patients screened, 3274 (73.6%) were eligible and 713 were registered, resulting in a recruitment rate of 16.0%. Thirty-three (4.6%) participants withdrew. The screened and registered participants were similar, but some between-treatment group imbalances were noted among those registered to the trial. All eight wards allocated to the intervention group completed the Prevention of Delirium manual milestone checklist and delivered the Prevention of Delirium intervention (median time 18.6 weeks for implementation). Overall, fidelity to the intervention was assessed as being high in two wards, medium in five wards and low in one ward. Of the expected 5645 Confusion Assessment Method delirium assessments, 5065 (89.7%) were completed during the first 10 days of admission. The rates of return of the patient-reported questionnaire booklets were 98.0% at baseline, 81.8% at 30 days and 70.5% at 3 months. The return rate of the EuroQol-5 Dimensions questionnaire was 98.6% at baseline, 77.5% at 1 month and 65.3% at 3 months (94–98% fully completed). The completion rate of the resource use questionnaire was lower (48.7%). The number of people with new-onset delirium at 10 days was 24 (7.0%) in the Prevention of Delirium group and 33 (8.9%) in the control group. Multilevel logistic regression analysis showed that participants in the Prevention of Delirium group had non-significant lower odds of developing delirium (odds ratio 0.68, 95% confidence interval 0.37 to 1.26; p = 0.2225). The average cost of the Prevention of Delirium intervention was estimated as £10.98 per patient and the mean costs for the Prevention of Delirium and usual-care groups were £5332 and £4412, respectively, with negligible between-group differences in quality-adjusted life-years. There was conflicting evidence from the trial- and model-based analyses relating to the cost-effectiveness of the Prevention of Delirium intervention. Given this, and in view of issues with the data (e.g. high levels of missingness), the results from the economic evaluation are highly uncertain. The criteria for continuation to a future definitive randomised controlled trial were met. Such a trial would need to recruit 5200 patients in 26 hospital clusters (200 patients per cluster).

Conclusions

The Prevention of Delirium system of care was successfully developed, and a multicentre feasibility study showed that the intervention is capable of implementation and delivery in routine care, with acceptable intervention fidelity and preliminary estimate of effectiveness.

Limitations

A prominent role for volunteers was originally intended in the Prevention of Delirium system of care, but only three of the eight wards allocated to the trial intervention group involved volunteers.

Future work

The findings indicate that a definitive multicentre evaluation of the Prevention of Delirium system of care should be designed and conducted to obtain robust estimates of clinical effectiveness and cost-effectiveness.

Trial registration

Current Controlled Trials ISRCTN28213290 (project 1), ISRCTN65924234 (project 2) and ISRCTN01187372 (project 3).

Funding

This project was funded by the National Institute for Health Research (NIHR) Programme Grants for Applied Research programme and will be published in full in Programme Grants for Applied Research; Vol. 9, No. 4. See the NIHR Journals Library website for further project information.

Preoperative Nutritional Status and Risk for Subsyndromal Delirium in Older Adults Following Joint Replacement Surgery

BACKGROUND

Subsyndromal delirium following surgery in older adults is related to increased lengths of hospital stay and increased admissions to long-term care. Impaired nutrition increases risk for delirium, but its relationship to subsyndromal delirium remains unclear.

PURPOSE

This correlational study examined the relationship between nutritional status and subsyndromal delirium in older adults.

METHODS

Assessments for subsyndromal delirium in 53 adults 65 years or older were completed for three consecutive days following joint replacement surgery. Relationships between nutritional status and subsyndromal delirium were analyzed. Level of significance for all tests was set at p ≤ .05.

RESULTS

Participants' scores from the Mini Nutritional Assessment screen were significantly related (p = .05) to subsyndromal delirium severity after accounting for variability posed by age and cognition status.

CONCLUSION

When preoperative risk assessment of older adults indicates nutritional risk, preoperative optimization may improve effectiveness of delirium prevention efforts.

The 4 'A's test for detecting delirium in acute medical patients: a diagnostic accuracy study

BACKGROUND

Delirium is a common and serious neuropsychiatric syndrome, usually triggered by illness or drugs. It remains underdetected. One reason for this is a lack of brief, pragmatic assessment tools. The 4 'A's test (Arousal, Attention, Abbreviated Mental Test - 4, Acute change) (4AT) is a screening tool designed for routine use. This project evaluated its usability, diagnostic accuracy and cost.

METHODS

Phase 1 - the usability of the 4AT in routine practice was measured with two surveys and two qualitative studies of health-care professionals, and a review of current clinical use of the 4AT as well as its presence in guidelines and reports. Phase 2 - the 4AT's diagnostic accuracy was assessed in newly admitted acute medical patients aged ≥ 70 years. Its performance was compared with that of the Confusion Assessment Method (CAM; a longer screening tool). The performance of individual 4AT test items was related to cognitive status, length of stay, new institutionalisation, mortality at 12 weeks and outcomes. The method used was a prospective, double-blind diagnostic test accuracy study in emergency departments or in acute general medical wards in three UK sites. Each patient underwent a reference standard delirium assessment and was also randomised to receive an assessment with either the 4AT (n = 421) or the CAM (n = 420). A health economics analysis was also conducted.

RESULTS

Phase 1 found evidence that delirium awareness is increasing, but also that there is a need for education on delirium in general and on the 4AT in particular. Most users reported that the 4AT was useful, and it was in widespread use both in the UK and beyond. No changes to the 4AT were considered necessary. Phase 2 involved 785 individuals who had data for analysis; their mean age was 81.4 (standard deviation 6.4) years, 45% were male, 99% were white and 9% had a known dementia diagnosis. The 4AT (n = 392) had an area under the receiver operating characteristic curve of 0.90. A positive 4AT score (> 3) had a specificity of 95% [95% confidence interval (CI) 92% to 97%] and a sensitivity of 76% (95% CI 61% to 87%) for reference standard delirium. The CAM (n = 382) had a specificity of 100% (95% CI 98% to 100%) and a sensitivity of 40% (95% CI 26% to 57%) in the subset of participants whom it was possible to assess using this. Patients with positive 4AT scores had longer lengths of stay (median 5 days, interquartile range 2.0-14.0 days) than did those with negative 4AT scores (median 2 days, interquartile range 1.0-6.0 days), and they had a higher 12-week mortality rate (16.1% and 9.2%, respectively). The estimated 12-week costs of an initial inpatient stay for patients with delirium were more than double the costs of an inpatient stay for patients without delirium (e.g. in Scotland, £7559, 95% CI £7362 to £7755, vs. £4215, 95% CI £4175 to £4254). The estimated cost of false-positive cases was £4653, of false-negative cases was £8956, and of a missed diagnosis was £2067.

LIMITATIONS

Patients were aged ≥ 70 years and were assessed soon after they were admitted, limiting generalisability. The treatment of patients in accordance with reference standard diagnosis limited the ability to assess comparative cost-effectiveness.

CONCLUSIONS

These findings support the use of the 4AT as a rapid delirium assessment instrument. The 4AT has acceptable diagnostic accuracy for acute older patients aged > 70 years.

FUTURE WORK

Further research should address the real-world implementation of delirium assessment. The 4AT should be tested in other populations.

TRIAL REGISTRATION

Current Controlled Trials ISRCTN53388093.

FUNDING

This project was funded by the National Institute for Health Research (NIHR) Health Technology Assessment programme and will be published in full in Health Technology Assessment; Vol. 23, No. 40. See the NIHR Journals Library website for further project information. The funder specified that any new delirium assessment tool should be compared against the CAM, but had no other role in the study design or conduct of the study.

Serious Consequences of Malnutrition and Delirium in Frail Older Patients

Malnutrition is highly prevalent in geriatric patients and is associated with an increased risk of death. In addition, delirium is a common condition of the older hospitalized patients. As brain has a high nutritional requirement, malnutrition may play an important role in cognitive dysfunction including the development of delirium. This study investigated the association between delirium and malnutrition in frail older patients and the effects on adverse outcomes. It was found that 75% of the patients with delirium suffered from malnutrition indicating that malnutrition contributes to the development of delirium in older hospitalized patients. Patients suffering from both malnutrition and delirium had a four times higher mortality in one month follow-up, a seven times increased rate of discharge to nursing homes and three days more in hospital. All older patients should routinely be assessed for malnutrition and delirium at admission to hospital and to prevent the development of delirium a close follow-up must take place to ensure adequate nutrition.

Preoperative Risk Factors for Subsyndromal Delirium in Older Adults Who Undergo Joint Replacement Surgery

BACKGROUND

Older adults with subsyndromal delirium have similar risks for adverse outcomes following joint replacement surgery as those who suffer from delirium.

PURPOSE

This study examined relationships among subsyndromal delirium and select preoperative risk factors in older adults following major orthopaedic surgery.

METHODS

Delirium assessments of a sample of 62 adults 65 years of age or older were completed on postoperative Days 1, 2, and 3 following joint replacement surgery. Data were analyzed for relationships among delirium symptoms and the following preoperative risk factors: increased comorbidity burden, cognitive impairment, fall history, and preoperative fasting time.

RESULTS

Postoperative subsyndromal delirium occurred in 68% of study participants. A recent fall history and a longer preoperative fasting time were associated with delirium symptoms (p ≤ .05).

CONCLUSIONS

Older adults with a recent history of falls within the past 6 months or a longer duration of preoperative fasting time may be at higher risk for delirium symptoms following joint replacement surgery.

Persistent Delirium in Elderly patients Three Months After Hospital Discharge from a University Clinic

OBJECTIVE

The purpose of the study was to determine the prevalence and characteristics of patients with persistent delirium (PD) at three months after hospital discharge.

METHODOLOGY

Longitudinal descriptive study to assess the prevalence and characteristics of in-patients aged 65 years and older in the Clinica Universitaria Bolivariana who met DSM-5 criteria for delirium at admission, at discharge, and at a 3-month follow up assessment. Socio-demographic features were determined, and CGI-S and DRS-R98 scales used.

RESULTS

A total of 30 patients were evaluated between April and October 2013, but 6 did not fulfil the inclusion criteria. The study included 24 patients, with 9 (37.5%) dying during hospitalisation. Of the 15 surviving patients, five (20.8% of the total sample) had their delirium resolved at discharge, and ten (41.6% of the sample) continued with symptoms. These established the PD group, of whom five of them (20.8%) had full PD, and the other five (20.8%) sub-syndromal PD (SSPD). At the final assessment, only two patients (8.3%) continued with full PD, and another two (8.3%) with SSPD. Among the PD group, 30% had a full delirium at admission (prevalence), and 70% developed full delirium during hospitalization (incidence).

CONCLUSIONS

A significant number of patients did not recover from delirium at leaving hospital, and remained symptomatic three months after discharge. The study findings suggest a course of gradual improvement of delirium, with a persistence of symptoms over time in 40% of the patients, which would have implications for the clinical practice.

Subsyndromal Delirium and Institutionalization Among Patients With Critical Illness

BACKGROUND

The prognostic importance of subsyndromal delirium is unknown.

OBJECTIVE

To test whether duration of subsyndromal delirium is independently associated with institutionalization.

METHODS

The Confusion Assessment Method for the Intensive Care Unit (CAM-ICU) was used twice daily to assess for subsyndromal delirium in patients with respiratory failure or shock. Delirium was considered present if the assessment was positive. Subsyndromal delirium was considered present if the assessment was negative but the patient exhibited any CAM-ICU features. Multivariable regression was used to determine the association between duration of subsyndromal delirium and institutionalization, adjusting for age, education, baseline cognition and disability, comorbidities, severity of illness, delirium, coma, sepsis, and doses of sedatives and opiates.

RESULTS

Subsyndromal delirium, lasting a median of 3 days, developed in 702 of 821 patients (86%). After adjusting for covariates, duration of subsyndromal delirium was an independent predictor of increased odds of institutionalization (P = .007). This association was greatest in patients with less delirium (P for interaction = .01). Specifically, of patients who were never delirious, those with 5 days of subsyndromal delirium (upper interquartile range [IQR]) were 4.2 times more likely to be institutionalized than those with 1.5 days of subsyndromal delirium (lower IQR).

CONCLUSIONS

Subsyndromal delirium occurred in most critically ill patients, and its duration was an independent predictor of institutionalization. Routine monitoring of all delirium symptoms may enable detection of full and subsyndromal forms of delirium.

How Swallow Pressures and Dysphagia Affect Malnutrition and Mealtime Outcomes in Long-Term Care

Malnutrition is a major cause of hospitalization for residents of long-term care facilities (LTC). Dysphagia is thought to contribute to malnutrition. Tongue weakness is suggested to predict poor food intake, longer meals, and dysphagia. We explored the relationships between tongue strength, dysphagia, malnutrition and mealtime outcomes in LTC residents. Data were collected from 639 LTC residents (199 male), aged 62-102 (mean 87). Maximum isometric tongue pressures (MIPs) and saliva swallow pressures (MSPs) were measured using the Iowa Oral Performance Instrument. Participants also completed the Screening Tool for Acute Neuro Dysphagia. Nutrition status was assessed using the Patient-Generated Subjective Global Assessment. A series of repeated meal observations provided measures of meal duration and calories consumed. Mean MIPs were 33 kPa (95% CI 29-37) and MSPs were 26 kPa (95% CI 23-29). The odds of showing signs of dysphagia were 3.7 times greater in those with MSPs less than 26 kPa (p < 0.05). The odds of being malnourished were almost double in those showing signs of dysphagia. Co-occurrence of dysphagia and malnutrition was seen in 29%. Residents with low MSPs also had significantly longer mealtime durations (MTD) (p < 0.05). Moreover, those with both low swallowing pressures and suspected dysphagia consumed fewer calories/minute (p < 0.05) and had significantly longer MTDs (p < 0.05). This study confirms associations between tongue weakness, signs of dysphagia, mealtime outcomes and malnutrition among LTC residents. These findings suggest that saliva swallow pressure measures may be helpful for early identification of dysphagia and nutritional risk in this population.

Subsyndromal delirium in the intensive care setting: Phenomenological characteristics and discrimination of subsyndromal delirium versus no and full-syndromal delirium

OBJECTIVE

Similar to delirium, its subsyndromal form has been recognized as the cause of diverse adverse outcomes. Nonetheless, the nature of this subsyndromal delirium remains vastly understudied. Therefore, in the following, we evaluate the phenomenological characteristics of this syndrome versus no and full-syndromal delirium.

METHOD

In this prospective cohort study, we evaluated the Delirium Rating Scale-Revised, 1998 (DRS-R-98) versus the Diagnostic and Statistical Manual of Mental Disorders, 4th ed., Text Revision (DSM-IV-TR) diagnostic criteria and examined the diagnosis of delirium with respect to phenomenological distinctions in the intensive care setting.

RESULTS

Out of 289 patients, 36 with subsyndromal delirium versus 86 with full-syndromal and 167 without delirium were identified. Agreement with respect to the DSM-IV-TR diagnosis of delirium was perfect. The most common subtype in those with subsyndromal delirium was hypoactive, in contrast to mixed subtype in those with full-syndromal delirium versus no motor alterations in those without delirium. By presence and severity of delirium symptoms, subsyndromal delirium was intermediate. The ability of the DRS-R-98 items to discriminate between either form of delirium was substantial. Between subsyndromal and no delirium, the cognitive domain and sleep-wake cycle were more impaired and allowed a distinction with no delirium. Further, between full- and subsyndromal delirium, the prevalence and severity of individual DRS-R-98 items were greater. Although the differences between these two forms of delirium was substantial, the items were not very specific, indicating that the phenomenology of subsyndromal delirium is closer to full-syndromal delirium.

SIGNIFICANCE OF RESULTS

Phenomenologically, subsyndromal delirium was found to be distinct from and intermediate between no delirium and full-syndromal delirium. Moreover, the greater proximity to full-syndromal delirium indicated that subsyndromal delirium represents an identifiable subform of full-syndromal delirium.

New institutionalisation following acute hospital admission: a retrospective cohort study

Background

institutionalisation following acute hospital admission is common and yet poorly described, with policy documents advising against this transition.

Objective

to characterise the individuals admitted to a care home on discharge from an acute hospital admission and to describe their assessment.

Design and setting

a retrospective cohort study of people admitted to a single large Scottish teaching hospital.

Subjects

100 individuals admitted to the acute hospital from home and discharged to a care home.

Methods

a single researcher extracted data from ward-based case notes.

Results

people discharged to care homes were predominantly female (62%), widowed (52%) older adults (mean 83.6 years) who lived alone (67%). About 95% had a diagnosed cognitive disorder or evidence of cognitive impairment. One-third of cases of delirium were unrecognised. Hospital stays were long (median 78.5 days; range 14-231 days) and transfers between settings were common. Family request, dementia, mobility, falls risk and behavioural concerns were the commonest reasons for the decision to admit to a care home. About 55% were in the acute hospital when the decision for a care home was made and 44% of that group were discharged directly from the acute hospital.

Conclusions

care home admission from hospital is common and yet there are no established standards to support best practice. Decisions should involve the whole multidisciplinary team in partnership with patients and families. Documentation of assessment in the case notes is variable. We advocate the development of interdisciplinary standards to support the assessment of this vulnerable and complex group of patients.

Frequency of delirium and subsyndromal delirium in an adult acute hospital population

Background The frequency of full syndromal and subsyndromal delirium is understudied. Aims We conducted a point prevalence study in a general hospital. Method Possible delirium identified by testing for inattention was evaluated regarding delirium status (full/subsyndromal delirium) using categorical (Confusion Assessment Method (CAM), DSM-IV) and dimensional (Delirium Rating Scale-Revised-98 (DRS-R98) scores) methods. Results In total 162 of 311 patients (52%) screened positive for inattention. Delirium was diagnosed in 55 patients (17.7%) using DSM-IV, 52 (16.7%) using CAM and 58 (18.6%) using DRS-R98⩾12 with concordance for 38 (12.2%) individuals. Subsyndromal delirium was identified in 24 patients (7.7%) using a DRS-R98 score of 7-11 and 41 (13.2%) using 2/4 CAM criteria. Subsyndromal delirium with inattention (v. without) had greater disturbance of multiple delirium symptoms. Conclusions The point prevalence of delirium and subsyndromal delirium was 25%. There was modest concordance between DRS-R98, DSM-IV and CAM delirium diagnoses. Inattention should be central to subsyndromal delirium definitions.

Subsyndromal delirium in older people: a systematic review of frequency, risk factors, course and outcomes

OBJECTIVE

To determine the frequency, risk factors, course and outcomes of subsyndromal delirium (SSD) in older people by systematically reviewing evidence on these topics.

METHODS

Subsyndromal delirium was defined as the presence of one or more symptoms of delirium, not meeting criteria for delirium and not progressing to delirium. MEDLINE, EMBASE, PsycINFO and the Web of Science were searched for potentially relevant articles published from 1996 to June 2011. The bibliographies of relevant articles were searched for additional references. Twelve studies met the inclusion criteria. The validity of included studies was assessed according to Evidence-Based Medicine criteria. Information about the study population and methods, age, gender, proportion with dementia, diagnostic criteria, period and frequency of observation, and the topics above was systematically abstracted, tabulated and synthesized using standard meta-analysis techniques.

RESULTS

The combined prevalence of SSD was 23% (95% CI, 9-42%); the combined incidence was 13% (95% CI, 6-23%). Risk factors were similar to those for delirium. Episodes lasted up to 133 days and were often recurrent. Outcomes were poor and often intermediate between those of older people with or without delirium. Of note, there was significant unexplained heterogeneity in the results of studies of prevalence, incidence and some risk factors.

CONCLUSIONS

SSD in older people may be a frequent and clinically important condition that falls on a continuum between no symptoms and full delirium. Because of significant unexplained heterogeneity in the results of studies of SSD, however, the results of this review must be interpreted cautiously. Further research is necessary.

Different functional outcomes in patients with delirium and subsyndromal delirium one month after hospital discharge

BACKGROUND

Subsyndromal delirium has an increasing relevance in the medical literature. There are only three studies in hospitalized elderly patients. Our goal is to demonstrate the importance of this syndrome in a population with more complexity and cognitive impairment than in previous studies.

METHODS

Prospective multicentre study in three tertiary hospitals. The health outcomes recorded in the follow-up at 1 month were the persistence of delirium, hospital readmission, discharge destination, death, Barthel index and the Delirium Rating Scale Revised 98. To assess the impact of delirium in the Barthel index at 30 days, we adjusted univariate and multivariate linear regression models.

RESULTS

85 patients were enrolled; 75.3% of the patients had at least 1 positive item in the Confusion Assessment Method; 45 patients (53%) were diagnosed with delirium and 19 (22.3%) with subsyndromal delirium (SSD). The 30-day risk of death was associated with lower levels of albumin (p = 0.021) and the Cumulative Illness Rating Scale in Geriatrics (CIRS-G; p = 0.003). Adjusting for CIRS-G and the initial Barthel index, the diagnosis of delirium appears to be related to a lower Barthel index at 30 days (p = 0.019), showing a significant linear gradient (p < 0.005).

CONCLUSION

SSD could help get more accurate diagnoses as well as improve patient management.

Subsyndromal delirium in old age: conceptual and methodological issues

Delirium is a cognitive disorder characterized by acute onset, fluctuating course, altered level of consciousness, inattention, disorganized thinking, disorientation, memory impairment, and perceptual and motor disturbances (American Psychiatric Association, 2000; World Health Organization, 2010). It occurs in hyperactive, hypoactive, or mixed forms in up to 42% of older hospital inpatients (Siddiqi et al., 2006) and 70% of older long-term care residents (McCusker et al., 2011). In both settings, delirium is independently associated with poor outcomes (Siddiqi et al., 2006; McCusker et al., 2010; Witlox et al., 2010).

[Subsyndromal delirium in elderly patients: a systematic review]

In this systemic review, the articles published between 1990 and November 2012 on subsyndromal delirium (SSD), and specifically those with reference to geriatric patients, were analysed. In SSD, symptoms from the three nuclear domains of delirium (cognitive, circadian and higher order thinking) are simultaneously present, with mild to moderate severity. Although the search for these clinical characteristics is a useful guide, there are no universally accepted diagnostic criteria for SSD. Regardless of the criteria used for diagnosis, SSD is persistently associated with poor functional and cognitive outcome, longer hospital stay, institutionalisation, and increased mortality. Studies are needed on the physiopathology, treatment and prevention in the field of SSD, which is a particularly important clinical condition in geriatric patients.

The course of subsyndromal delirium in older long-term care residents

OBJECTIVE

To determine the course of incident subsyndromal delirium (SSD) in older long-term care (LTC) residents. A secondary objective was to explore the use of a more restrictive definition of SSD on the findings of the study.

DESIGN

Cohort study with repeated weekly assessments for up to 6 months.

SETTING

Seven LTC facilities in Montreal and Quebec City, Canada.

PARTICIPANTS

LTC residents aged 65 and more and free of delirium core symptoms at baseline.

MEASURES

The Mini-Mental State Examination (MMSE), Confusion Assessment Method (CAM), Delirium Index (DI), Hierarchic Dementia Scale, and Barthel Index were completed at baseline. The MMSE, CAM, and DI were repeated weekly for 6 months. SSD1 required one or more CAM core symptoms; SSD2, a more restrictive definition, required two or more CAM core symptoms.

RESULTS

Sixty-eight residents had 129 incident episodes of SSD1: 32 had one episode and 36 had two or more episodes. Episodes lasted 7 - 133 days, mean 13.7 (SD: 14.8) days; mean number of symptoms per episode was 1.1 (SD: 0.4). Rates of recovery at 1, 2, and 4 weeks and 6 months were 45.7%, 61.2%, 64.6%, and 78.3%, respectively. Thirty-three residents had 49 episodes of SSD2: 21 had 1 episode and 12 had 2 or more episodes. Use of the more restrictive definition significantly increased time to recovery and reduced rate of recovery.

CONCLUSION

Episodes of SSD in older LTC residents appeared to last 7-133 days (mean: 13.7) and were often recurrent. Use of a more restrictive definition resulted in a more protracted course.

Epidemiology and risk factors for delirium across hospital settings

Delirium is one of the most common causes of acute end-organ dysfunction across hospital settings, occurring in as high as 80% of critically ill patients that require intensive care unit (ICU) care. The implications of this acute form of brain injury are profound. Across many hospital settings (emergency department, general medical ward, postoperative and ICU), a patient who experiences delirium is more likely to experience increased short- and long-term mortality, decreases in long-term cognitive function, increases in hospital length of stay and increased complications of hospital care. With the development of reliable setting-specific delirium-screening instruments, researchers have been able to highlight the predisposing and potentially modifiable risk factors that place patients at highest risk. Among the large number of risk factors discovered, administration of potent sedative medications, most notably benzodiazepines, is most consistently and strongly associated with an increased burden of delirium. Alternatively, in both the hospital and ICU, delirium can be prevented with the application of protocols that include early mobility/exercise. Future studies must work to understand the epidemiology across settings and focus upon modifiable risk factors that can be integrated into existing delirium prevention and treatment protocols.

Phenotype of subsyndromal delirium using pooled multicultural Delirium Rating Scale--Revised-98 data

OBJECTIVE

There is no consensus definition for the phenotype of subsyndromal delirium (SSD), a subthreshold state to full delirium. Without an a priori definition we applied advanced analytic techniques to discern SSD.

METHOD

We pooled Delirium Rating Scale-Revised-98 (DRS-R98) data from 859 DSM-IV diagnosed nondemented delirious adults and nondelirious controls collected by investigators in 7 countries. Discriminant analyses defined an SSD group that was then compared to Nondelirium and Delirium groups.

RESULTS

SSD (n=138) had intermediate DRS-R98 item severities between Delirium (n=497) and Nondelirium (n=224) groups, where groups significantly differed on all DRS-R98 items (ANOVA p<.001) except delusions. Discriminant analysis found SSD phenomenologically closer to Delirium than Nondelirium. Using full multinomial logistical regression, SSD was distinguished from Nondelirium by temporal onset, sleep-wake cycle, perceptual disturbances, motor retardation, delusion, affective lability, and all cognitive items; SSD was similar to Delirium in thought process, language, motor agitation or retardation, sleep-wake cycle, all cognitive items, fluctuation and physical disorder. The multivariate model correctly classified 94.2% of Nondelirium, 75.4% of SSD and 97.2% of Delirium subjects. Binary logistic regression of six core domain symptoms (sleep-wake cycle, thought process, language, attention, orientation, and visuospatial ability) together were found as highly differentiating of SSD from Nondelirium, which correctly classified almost 80% of SDD.

CONCLUSIONS

SSD is intermediate in severity between nondelirious controls and full syndromal delirium, but its phenotype is more like delirium. Core domain delirium symptoms present at milder severity in SSD should be evaluated further for utility in detecting and managing SSD, preventing delirium, and possible inclusion in DSM-V.

Six-month outcome of elderly people hospitalized via the emergency department: the SAFES cohort

BACKGROUND

The objective of the study was to identify factors predictive of 6-month institutionalization or mortality in frail elderly patients after acute hospitalization.

METHODS

A prospective cohort of elderly subjects 75 years and older was set up in nine French teaching hospitals. Data obtained from a comprehensive geriatric assessment were used in a Cox model to predict 6-month institutionalization or mortality. Institutionalization was defined as incident admission either to a nursing home or other long-term care facility during the follow-up period.

RESULTS

Crude institutionalization and death rates after 6 months of follow-up were 18% and 24%, respectively. Independent predictors of institutionalization were: living alone (HR=1.83; 95% CI=1.27-2.62) or a higher number of children (HR=0.86; 95% CI=0.78-0.96), balance problems (HR=1.72; 95% CI=1.19-2.47), malnutrition or risk thereof (HR=1.93; 95% CI=1.24-3.01), and dementia syndrome (HR=1.88; 95% CI=1.32-2.67). Factors found to be independently related to 6-month mortality were exclusively medical factors: malnutrition or risk thereof (HR=1.92; 95% CI=1.17-3.16), delirium (HR=1.80; 95% CI=1.24-2.62), and a high level of comorbidity (HR=1.62; 95% CI=1.09-2.40). Institutionalization (HR=1.92; 95% CI=1.37-2.71) and unplanned readmission (HR=4.47; 95% CI=3.16-2.71) within the follow-up period were also found as independent predictors.

CONCLUSION

The main factors predictive of 6-month outcome identified in this study are modifiable by global and multidisciplinary interventions. Their early identification and management would make it possible to modify frail elderly subjects' prognosis favorably.

Cost-effectiveness of multi-component interventions to prevent delirium in older people admitted to medical wards

INTRODUCTION

there is evidence to suggest that delirium incidence can be reduced in older people admitted to medical services using multi-component interventions that target delirium risk factors. The cost-effectiveness of this approach is uncertain. We therefore developed a novel cost-effectiveness model for delirium prevention.

METHOD

we compared multi-component delirium prevention intervention with usual care using a model based on a decision tree analysis. The model was used to estimate the incremental net monetary benefit (INMB). The robustness of the cost-effectiveness result was explored using deterministic and probabilistic sensitivity analyses.

RESULT

the multi-component prevention intervention was cost-effective when compared with usual care. It was associated with an INMB of £2,200 using a cost-effectiveness threshold of £20,000 per quality-adjusted life year (QALY). It remained cost-effective in the majority of the deterministic sensitivity analyses and was cost-effective in 96.8% of the simulations carried out in the probabilistic sensitivity analysis.

DISCUSSION

our analysis has shown convincingly that multi-component prevention interventions for delirium should be considered as a cost-effective health-care strategy for medically ill people admitted to hospital. It is an attractive intervention for health-care planners as they strive to reconfigure their services to better meet the needs of an ageing population.

Features of subsyndromal and persistent delirium

BACKGROUND

Longitudinal studies of delirium phenomenology are lacking.

AIMS

We studied features that characterise subsyndromal delirium and persistent delirium over time.

METHOD

Twice-weekly evaluations of 100 adults with DSM-IV delirium using the Delirium Rating Scale-Revised-98 (DRS-R98) and Cognitive Test for Delirium (CTD). The generalised estimating equation method identified symptom patterns distinguishing full syndromal from subsyndromal delirium and resolving from persistent delirium.

RESULTS

Participants (mean age 70.2 years (s.d. = 10.5)) underwent 323 assessments (range 2-9). Full syndromal delirium was significantly more severe than subsyndromal delirium for DRS-R98 thought process abnormalities, delusions, hallucinations, agitation, retardation, orientation, attention, and short- and long-term memory items, and CTD attention, vigilance, orientation and memory. Persistent full syndromal delirium had greater disturbance of DRS-R98 thought process abnormalities, delusions, agitation, orientation, attention, and short- and long-term memory items, and CTD attention, vigilance and orientation.

CONCLUSIONS

Full syndromal delirium differs from subsyndromal delirium over time by greater severity of many cognitive and non-cognitive symptoms. Persistent delirium involves increasing prominence of recognised core diagnostic features and cognitive impairment.

The overlap of delirium with neuropsychiatric symptoms among patients with dementia

OBJECTIVES

To study the frequency of overlapping of delirium with neuropsychiatric symptoms (NPS) among patients with dementia, and to investigate the prognostic value of delirium, multiple NPS without delirium, or neither during a 2-year follow-up.

METHODS

We assessed 425 consecutive patients in acute geriatric wards and in seven nursing homes in Helsinki. Those 255 suffering from dementia were examined for NPS of dementia described in the Neuropsychiatric Inventory (delusions, hallucinations, agitation/aggression, depression/low mood, anxiety, euphoria/elation, apathy, disinhibition, irritability/mood changes, and aberrant motor behavior) and for delirium criteria according to the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV). Patients were categorized into three groups: delirium with or without multiple NPS (delirium group), multiple NPS without delirium (multiple NPS group), or having neither delirium nor multiple NPS (zero or only one NPS group).

RESULTS

A total of 66 patients suffered from delirium according to the DSM-IV, 127 had multiple NPS without delirium, and 62 had neither multiple NPS nor delirium. In the delirium group 61 individuals (92.4%) were deceased or residing in permanent institutional care at the end of the 2-year follow up period, compared to 100 individuals (78.7%) in the multiple NPS group and 48 (77.4%) in the zero or one NPS group (Pearson χ² = 6.64, df 2, p = 0.036). In logistic regression analysis adjusted for age, sex, and comorbidities, delirium was an independent predictor of this composite outcome (OR: 4.3, 95% CI: 1.4-13.6).

CONCLUSIONS

Patient groups with symptoms of delirium and multiple NPS are highly overlapping. The presence of delirium indicates poor prognosis.

Subtle deficits of attention after surgery: quantifying indicators of sub syndrome delirium

OBJECTIVE

To determine whether attentional impairments are reliable neuropsychological markers of sub syndrome delirium.

METHOD

A prospective cohort study with repeated assessment beginning pre-operatively and continuing through the first post-operative week. Computerized assessments of attention and the Mini-Mental State Examination were administered with one hundred patients admitted for elective orthopedic surgery, 70 years and over and free of dementia. Acute change of cognitive status was used to identify cases of sub syndrome delirium.

RESULTS

There were significant differences of post-surgical performance between the 'no delirium' and 'sub-syndrome delirium' groups of reaction time, global cognition, accuracy and greater variability of reaction time (p < 0.041). There were significant within subject main effects on reaction time (p = 0.001), variability of reaction time (p = 0.022) and MMSE (p = 0.000) across the cohort; but no significant interaction effect of 'diagnosis' * 'time' on the computerized measures of attention (p > 0.195).

CONCLUSION

The distinction between people with sub syndrome delirium and no delirium is difficult to quantify but computerized measures of attention might provide a sensitive indicator. Sub syndrome delirium is an observable marker of a clinical abnormality that should be exploited to improve care management for vulnerable patients.

Delirium in the older emergency department patient: a quiet epidemic

Delirium is defined as an acute change in cognition that cannot be better accounted for by a preexisting or evolving dementia. This form of organ dysfunction commonly occurs in older patients in the emergency department (ED) and is associated with a multitude of adverse patient outcomes. Consequently, delirium should be routinely screened for in older ED patients. Once delirium is diagnosed, the ED evaluation should focus on searching for the underlying cause. Infection is one of the most common precipitants of delirium, but multiple causes may exist concurrently.

How to improve nutritional support in geriatric institutions

Nutritional problems are frequent in nursing homes including undernutrition, obesity, and diabetes mellitus, mainly related to disability and behavior troubles. Adequate nutritional care relies both on the quality of menus for regular and modified diet (texture-modified and enriched food) and on the staff knowledge of nutritional problems, particularly undernutrition. Self-assessment of professional practices for all staff categories that are involved in this area can be used to increase training of staff and quality of nutritional care.

Nutritional status and delirium in long-term care elderly individuals

Delirium is physiologically plausible in elderly individuals with a poor nutritional status. We explored body composition, serum protein levels, and delirium in a multicenter long-term care study using bioelectrical impedance analysis (BIA). Estimates from the BIA procedure included the body cell mass and fat-free mass (FFM) of nursing home elderly residents (N = 312). Increased delirium was identified in men and women who were leaner and had lower FFM. Clinical surveillance for delirium in frail elderly individuals with low serum albumin levels and polypharmacy is recommended because of their increased likelihood of having drug toxicities for medications with protein-binding properties.

Managing delirium in hospitalized elderly patients

This review highlights the key elements of guidelines developed for the management of delirium. Experts and expert panels in several countries have presented their own guidelines, which have similarities but also differences in their emphases. The essential elements in the management of delirium are appropriate detection and diagnosis, assessment and treatment of underlying conditions, symptom management, environmental and supportive interventions, post-delirium care and follow-up, and paying attention to risk factors and prevention. The level of evidence behind each recommendation of the guidelines is discussed, as well as some of the typical pitfalls in the care of patients with delirium. Although rigorous randomized intervention trials on full-blown delirium are still scarce, we have some trials suggesting how to manage each dimension of the care of delirium.

Disability and quality of life in elderly people with diabetes

To implement preventive policies of disability in older diabetic people, the role of diabetes in the disablement process should be investigated. Diabetes mellitus is consistently associated with a higher prevalence of disability at all states, as well as with a progression in disability states and may be considered as a brake on recovery. This association is partially explained by existing complications, associated conditions (obesity, depression, arterial hypertension) treatment burden, and other social characteristics (lower income, lower educational level). Finally, in the disablement process, the role of altered muscle metabolism due to diabetes, aging, nutrition and sedentary lifestyle may represent a major target for interventions to improve functions and potentially activities in elderly people.

Caring the elderly diabetic patient with respect to concepts of successful aging and frailty

Successful aging and frailty are emerging constructs becoming necessary to define prevention and treatment goals in elderly subjects. Frailty corresponds to the stages between full autonomy or successful aging and irreversible functional dependency or pathological aging. However its definition is imprecise and potential clinical criteria are numerous and interrelated. Diabetes decreases the likelihood for successful aging and particularly increases the risk for functional dependency. One major end-point in the care of elderly diabetic subjects is to investigate the impact of blood glucose control on progression of disability. Geriatric intervention based on comprehensive geriatric assessment (CGA) in the frail elderly population has been shown effective to prevent the loss of autonomy and to improve quality of life, but seems ineffective on mortality. It is now recommended to screen elderly diabetic patients for frailty criteria. The effect of combined individualized diabetes care and CGA on the aging profile should be investigated.

Male gender influences response to an educational package for delirium prevention among older people: a stratified analysis

BACKGROUND

Increasing evidence is pointing towards the efficacy of intervention programmes in decreasing the incidence of delirium among older people admitted to hospital. We have previously shown that an educational package directed at doctors and nurses significantly decreased the point prevalence of delirium among older people on a general medical ward. It is not yet established whether specific and 'fixed' patients' characteristics influence the rate of response to such an intervention.

METHODS

A secondary, exploratory stratified analysis was carried out to determine whether age, sex and presence of dementia might influence the effect of the intervention through a delirium educational package. This information is important in order to increase the effectiveness of preventive measures across various patients' subgroups.

RESULTS

Male gender (OR 0.17, 0.05-0.65) significantly (p = 0.030) and positively influence the response to the educational package compared to female gender (OR 1.04, 0.38-2.81). Neither age nor the presence of underlying dementia was associated with a significant influence on the rate of response to the delirium prevention package.

CONCLUSION

Staff may be more likely to implement an earlier and more effective intervention for males who are perceived as presenting a higher risk to themselves and others. The results reported highlight the need to increase staff's vigilance to female patients whose prodromal symptoms of delirium may be underemphasised. Understanding different sub-group responses to preventive educational packages for delirium is an important consideration if these are to be applied widely.

Delirium in Postacute and Long-term Care

Delirium is a classic geriatric syndrome that occurs commonly among the frail elders who make up many of the residents in postacute and long-term care facilities. The prevalence of the disorder in these settings may be increasing as a result of the pressure to reduce hospital length of stay. Clinicians often do not recognize when patients in their care are delirious, but simple and practical means exist to allow its diagnosis. Those who practice in long-term care must be knowledgeable about the risk factors for the disorder, as well as how to recognize, diagnose, prevent, and treat it.

Cholinesterase inhibition as a possible therapy for delirium in vascular dementia: a controlled, open 24-month study of 246 patients

The goal of this study was to determine whether rivastigmine, a dual inhibitor of acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE), has any effect on delirium in vascular dementia (VaD). The results from this follow-up study suggest that although delirium is frequent in elderly, cognitively impaired patients, it might not be a simple consequence of acute disease and hospitalization. Rather, delirium can be secondary to brain damage and to metabolic disturbances. According to the Lewy body dementia model, delirium could be induced by a lack of acetylcholine in the brain. Rivastigmine may help reduce the frequency of delirium episodes and help shorten their duration. Additional studies are required to better define the causes of delirium, which currently has no definitive treatment.