Preliminary development of an ultrabrief two-item bedside test for delirium

Screening and detection of delirium in older ED patients: performance of the modified Confusion Assessment Method for the Emergency Department (mCAM-ED). A two-step tool

Delirium is frequent in older Emergency Department (ED) patients, but detection rates for delirium in the ED are low. To aid in identifying delirium, we developed and implemented a two-step systematic delirium screening and assessment tool in our ED: the modified Confusion Assessment Method for the Emergency Department (mCAM-ED). Components of the mCAM-ED include: (1) screening for inattention, the main feature of delirium, which was performed with the Months Backwards Test (MBT); (2) delirium assessment based on a structured interview with questions from the Mental Status Questionnaire by Kahn et al. and the Comprehension Test by Hart et al. The aims of our study are (1) to investigate the performance criteria of the mCAM-ED tool in a consecutive sample of older ED patients, (2) to evaluate the performance of the mCAM-ED in patients with and without dementia and (3) to test whether this tool is efficient in keeping evaluation time to a minimum and reducing screening and assessment burden on the patient. For this prospective validation study, we recruited a consecutive sample of ED patients aged 65 and older during an 11-day period in November 2015. Trained nurses assessed patients with the mCAM-ED. Results were compared to the reference standard [i.e. the geriatricians' delirium diagnosis based on the criteria of the Text Revision of the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV-TR)]. Performance criteria were computed. We included 286 consecutive ED patients aged 65 and older. The median age was 80.02 (Q₁ = 72.15; Q₃ = 86.76), 58.7% of included patients were female, 14.3% had dementia. We found a delirium prevalence of 7.0%. In patients with dementia, specificity and positive likelihood ratio were lower. When compared to the reference standard, delirium assessment with the mCAM-ED has a 0.98 specificity and a 39.9 positive likelihood ratio. In 80.0% of all cases, the first step of the mCAM-ED, i.e. screening for inattention with the MBT, took less than 30 s. On average, the complete mCAM-ED assessment required 3.2 (SD 2.0), 5.6 (SD 3.2), and 6.2 (SD 2.3) minutes in cognitively unimpaired patients, patients with dementia and patients with dementia or delirium, respectively. The mCAM-ED is able to efficiently rule out delirium as well as confirm the diagnosis of delirium in elderly patients with and without dementia and applies minimal screening and assessment burden on the patient.

Attention, arousal and other rapid bedside screening instruments for delirium in older patients: a systematic review of test accuracy studies

Objective

delirium occurs frequently in frail patients but is easily missed. Screening with a rapid, easy-to-use and highly sensitive instrument might help improve recognition. The aim of this study was to review attention, arousal and other rapid bedside screening instruments for delirium in older patients.

Methods

a literature search was performed in PubMed, PsycINFO and Embase. We scrutinized forward citations in Google Scholar, and references of included articles and prior reviews. We included studies among older patients that investigated the sensitivity and specificity of delirium screening instruments that could be administered in 3 min or less, and did not require surrogate information. We extracted study characteristics, risk of bias, sensitivity and specificity.

Results

we identified 27 studies among 4,766 patients in hospitals and nursing homes. They tested many different single and several combined screening instruments. Prevalence of delirium varied between 4% and 57%. Only one study scored a low risk of bias on all domains. Sensitivity varied between 17% and 100%, and specificity between 38% and 99%. Of the 22 tests with sensitivity ≥90%, seven also had specificity ≥80% in older patients in general. These results were approximately reproduced for the Observational Scale of Level of Arousal (OSLA) and Richmond Agitation and Sedation Scale (RASS): sensitivity and specificity were >80%.

Conclusion

two arousal tests-OSLA and RASS-had reproduced high sensitivity and specificity in older patients. Nurses can administer these tests during daily interaction with patients. Test accuracy studies about rapid screening tools for delirium superimposed on dementia were scarce.

Focusing on Inattention: The Diagnostic Accuracy of Brief Measures of Inattention for Detecting Delirium

BACKGROUND

Delirium is frequently missed in most clinical settings. Brief delirium assessments are needed.

OBJECTIVE

To determine the diagnostic accuracy of reciting the months of year backwards (MOTYB) from December to July (MOTYB-6) and December to January (MOTYB-12) for delirium as diagnosed by a psychiatrist and to explore the diagnostic accuracies of the following other brief attention tasks: (1) spell the word "LUNCH" backwards, (2) recite the days of the week backwards, (3) 10-letter vigilance "A" task, and (4) 5 picture recognition task.

DESIGN

Preplanned secondary analysis of a prospective observational study.

SETTING

Emergency department located within an academic, tertiary care hospital.

PARTICIPANTS

234 acutely ill patients who were =65 years old.

MEASUREMENTS

The inattention tasks were administered by a physician. The reference standard for delirium was a comprehensive psychiatrist assessment using Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision criteria. Sensitivities and specificities were calculated.

RESULTS

Making any error on the MOTYB-6 task had a sensitivity of 80.0% (95% confidence interval [CI], 60.9%-91.1%) and specificity of 57.1% (95% CI, 50.4%- 63.7%). Making any error on the MOTYB-12 task had a sensitivity of 84.0% (95% CI, 65.4%-93.6%) and specificity of 51.9% (95% CI, 45.2%-58.5%). The best combination of sensitivity and specificity was reciting the days of the week backwards task; if the patient made any error, this was 84.0% (95% CI, 65.4%-93.6%) sensitive and 81.9% (95% CI, 76.1%-86.5%) specific.

CONCLUSIONS

MOTYB-6 and MOTYB-12 had very good sensitivities but had modest specificities for delirium, limiting their use as a standalone assessment. Reciting the days of the week backwards appeared to have the best combination of sensitivity and specificity for delirium.

Optimization of the APOP screener to predict functional decline or mortality in older emergency department patients: Cross-validation in four prospective cohorts

INTRODUCTION

Many screening instruments to predict adverse health outcomes in older patients visiting the emergency department (ED) have been developed, but successful implementation has been hampered because they are insufficiently validated or not tailored for the intended use of everyday clinical practice. The present study aims to refine and validate an existing screening instrument (the APOP screener) to predict 90-day functional decline or mortality in older ED patients.

METHODS

Consecutive older patients (≥70 years) visiting the EDs of four hospitals were included and prospectively followed. First, an expert panel used predefined criteria to decide which independent predictors (including demographics, illness severity and geriatric parameters) were suitable for refinement of the model predicting functional decline or mortality after 90 days. Second, the model was cross-validated in all four hospitals and predictive performance was assessed. Additionally, a pilot study among triage nurses experiences and clinical usability of the APOP screener was conducted.

RESULTS

In total 2629 older patients were included, with a median age of 79 years (IQR 74-84). After 90 days 805 patients (30.6%) experienced functional decline or mortality. The refined prediction model included age, gender, way of arrival, need of regular help, need help in bathing/showering, hospitalization the prior six months and impaired cognition. Calibration was good and cross-validation was successful with a pooled area under the curve of 0.71 (0.69-0.73). In the top 20% patients predicted to be at highest risk in total 58% (95%CI 54%-62%) experienced functional decline or mortality. Triage nurses found the screener well suited for clinical use, with room for improvement.

CONCLUSION

In conclusion, optimization of the APOP screener resulted in a short and more simplified screener, which adequately identifies older ED patients at highest risk for functional decline or mortality. The findings of the pilot study were promising for clinical use.

[Cognitive decline in geriatric oncology: Trends, evaluation and treatment]

Cancer prevalence increases with aging. Prevalent or incident neurocognitive disorders are frequent in geriatric oncology. Cognitive decline associated with cancer increases the risk of under or over-cancer treatment and makes therapeutic decisions complex. In this context, we present tools to optimize cognitive impairment screening, identification of underlying mechanisms and specific treatments. Geriatric specialists intervention can help global care, social services utilization and patient's orientation when ambulatory cares become difficult.

Pilot Study of a Two-Step Delirium Detection Protocol Administered By Certified Nursing Assistants, Physicians, and Registered Nurses

The feasibility and acceptability of a two-step screening protocol for delirium identification was pilot tested. Step 1, a screening tool, comprises two items: "Please tell me the day of the week," and "Please tell me the months of the year backwards starting with December." If either/both items are incorrect, Step 2, a 3-minute diagnostic assessment, follows. Trained researchers enrolled 24 hospitalized older adults and identified 22% to be delirious after a reference standard assessment. Thereafter, physicians and RNs completed the two-step protocol, whereas certified nursing assistants (CNAs) completed the screener only, on the same patients. All three clinical assessments were successfully completed in 100% of enrolled participants and within the target 2-hour time window in 91%. The screener and two-step protocol achieved high sensitivities and specificities in RNs, CNAs, and physicians. Qualitative information on barriers to and facilitators of implementation was also collected. Nurses and other clinicians can feasibly implement this ultra-brief screener and two-step protocol, which holds promise to improve delirium identification. [Journal of Gerontological Nursing, 44(5), 18-24.].

Delirium in the Elderly

Delirium is defined as an acute disturbance in attention and cognition, with significant associated morbidity and mortality. This article discusses the basic epidemiology of delirium and approaches to diagnosing, assessing, and working up patients for delirium. It delineates the pathophysiology and underlying predisposing and precipitating factors for delirium. It also discusses recent advances in prevention and treatment, particularly multicomponent, nonpharmacological interventions.

Delirium in Hospitalized Older Adults

A 75-year-old man is admitted for scheduled major abdominal surgery. He is functionally independent, with mild forgetfulness. His intraoperative course is uneventful, but on postoperative day 2, severe confusion and agitation develop. What is going on? How would you manage this patient’s care? Could his condition have been prevented?

Hospitalized Older Adults With Established Delirium: Recognition, Documentation, and Reporting

Delirium, a life-threatening complication for hospitalized older adults associated with adverse outcomes, is often underrecognized and underreported. The purpose of the current study was to analyze delirium documentation for hospitalized older adults. Charts of 34 patients, aged 71 and older with documented delirium and referral to a Hospital Elder Life Program, were reviewed. With the exception of International Classification of Diseases-9 coding, delirium was only mentioned in 12 (35.3%) charts, although descriptors potentially indicative of delirium were usually recorded. Of these, the most frequently recorded were confusion (94.1%), mental status change (70.6%), and disorientation (61.8%). When nurses charted delirium descriptors, only 5.9% of their notes included physician referral. Physician responses were to order diagnostic tests and medications, usually antipsychotic or benzodiazepine agents. Of 28 patients requiring transfer to another facility after discharge, delirium was mentioned in only one transfer note. Commonly used delirium descriptors can be used for the development of natural language processing tools for clinical decision support. [Journal of Gerontological Nursing, 43(3), 32-40.].

The Diagnosis of Delirium Superimposed on Dementia: An Emerging Challenge

Delirium occurring in patients with dementia is referred to as delirium superimposed on dementia (DSD). People who are older with dementia and who are institutionalized are at increased risk of developing delirium when hospitalized. In addition, their prior cognitive impairment makes detecting their delirium a challenge. The Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition and the International Statistical Classification of Diseases and Related Health Problems, 10th Revision are considered the standard reference for the diagnosis of delirium and include criteria of impairments in cognitive processes such as attention, additional cognitive disturbances, or altered level of arousal. The Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition and the International Statistical Classification of Diseases and Related Health Problems, 10th Revision does not provide guidance regarding specific tests for assessment of the cognitive process impaired in delirium. Importantly, the assessment or inclusion of preexisting cognitive impairment is also not addressed by these standards. The challenge of DSD gets more complex as types of dementia, particularly dementia with Lewy bodies, which has features of both delirium and dementia, are considered. The objective of this article is to critically review key elements for the diagnosis of DSD, including the challenge of neuropsychological assessment in patients with dementia and the influence of particular tests used to diagnose DSD. To address the challenges of DSD diagnosis, we present a framework for guiding the focus of future research efforts to develop a reliable reference standard to diagnose DSD. A key feature of a reliable reference standard will improve the ability to clinically diagnose DSD in facility-based patients and research studies.

Validation of the delirium observation screening scale in a hospitalized older population

Delirium is challenging to diagnose in older populations. It is often reversible, and when detected, treatment can improve patient outcomes. Delirium detection currently relies on trained staff to conduct neurocognitive interviews. The Delirium Observation Screening Scale (DOS) is a screen designed to allow faster, easier identification of delirium. In this validation study, conducted at an academic tertiary care center, we attempted to determine the accuracy of the DOS as a delirium screening tool in hospitalized patients over 64 years old. We compared DOS results to a validated delirium diagnostic tool, the Delirium Rating Scale-Revised-98. We also assess the user-friendliness of the DOS by nurses via electronic survey. In 101 assessments of 54 patients, the DOS had sensitivity of 90% and specificity of 91% for delirium. The DOS is an accurate and easy way to screen for delirium in older inpatients. Journal of Hospital Medicine 2016;11:494-497. © 2016 Society of Hospital Medicine.

Testing the functional assessment of mentation: A mobile application based assessment of mental status

BACKGROUND

Altered mental status is a significant predictor of mortality in hospitalized patients and a prerequisite component to the diagnosis of delirium. However, the detection of altered mental status is often incomplete, inaccurate, and resource intensive.

OBJECTIVE

To identify the clinical utility and feasibility of the Functional Assessment of Mentation (FAM(TM) ), a mobile application for evaluating attention and recall.

DESIGN

Prospective observational pilot study.

SETTING

Tertiary care medical center.

PARTICIPANTS

Nine hundred thirty-one adult subjects (612 nonhospitalized and 319 hospitalized).

MEASUREMENTS

Score distribution and time to FAM(TM) completion were compared between nonhospitalized and hospitalized subjects (as well as between hospitalized subjects discharged home and those not discharged home). Additionally, in the hospitalized subgroup, FAM(TM) was compared to the Glasgow Coma Scale (GCS), using the Short Portable Mental Status Questionnaire (SPMSQ) as our criterion standard for altered mental status assessment.

RESULTS

Median time to completion of FAM(TM) was 55 seconds (interquartile range [IQR], 45-67 seconds). Our data identified a graded reduction in score comparing nonhospitalized subjects to hospitalized subjects discharged home and not discharged home (median 5 [IQR 4-7] vs 5 [IQR 3-6] vs 3 [IQR 1-5]; P < 0.001). In the hospitalized subset, FAM(TM) scores were more highly correlated to SPMSQ (Spearman ρ = 0.27, P < 0.001) compared to GCS (Spearman ρ = 0.05, P = 0.40).

CONCLUSIONS

FAM(TM) is a rapid and clinically feasible tool that can identify minor alterations in mental status often missed by GCS. Journal of Hospital Medicine 2016;11:463-466. 2016 Society of Hospital Medicine.

Detecting Delirium Superimposed on Dementia: Evaluation of the Diagnostic Performance of the Richmond Agitation and Sedation Scale

OBJECTIVES

Delirium disproportionately affects patients with dementia and is associated with adverse outcomes. The diagnosis of delirium superimposed on dementia (DSD), however, can be challenging due to several factors, including the absence of caregivers or the severity of preexisting cognitive impairment. Altered level of consciousness has been advocated as a possible useful indicator of delirium in this population. Here we evaluated the performance of the Richmond Agitation and Sedation Scale (RASS) and the modified-RASS (m-RASS), an ultra-brief measure of the level of consciousness, in the diagnosis of DSD.

DESIGN

Multicenter prospective observational study. RASS and m-RASS results were analyzed together, labeled RASS/m-RASS.

SETTING

Acute geriatric wards, in-hospital rehabilitation, emergency department.

PARTICIPANTS

Patients 65 years and older with dementia.

MEASUREMENTS

Delirium was diagnosed with the Diagnostic and Statistical Manual of Mental Disorders, 4th edition (DSM-IV) or with the Delirium Rating Scale-Revised (DRS-R-98), or with the 4 A's Test (4AT). Dementia was detected with the Clinical Dementia Rating (CDR) Scale, the Short Form-Informant Questionnaire on Cognitive Decline in the Elderly (IQCODE) or via the clinical records.

RESULTS

Of the 645 patients included, 376 (58%) had delirium. According to the instrument used to evaluate delirium, the prevalence was 66% with the 4AT, 23% with the DSM, and 100% with the DRS-R-98. Overall a RASS/m-RASS score other than 0 was 70.5% sensitive (95% confidence interval [CI] 65.9%-75.1%) and 84.8% (CI 80.5%-89.1%) specific for DSD. Using a RASS/m-RASS value greater than +1 or less than -1 as a cutoff, the sensitivity was 30.6% (CI 25.9%-35.2%) and the specificity was 95.5% (CI 93.1%-98.0%). The sensitivity and the specificity did not greatly vary according to the method of delirium diagnosis and the dementia ascertainment, although the specificity was slightly higher when the DSM and the IQCODE were used.

CONCLUSION

In older patients admitted to different clinical settings, the RASS and m-RASS analyzed as a single group had moderate sensitivity and very high specificity for the detection of DSD. Level of consciousness is therefore a valuable clinical indicator that should form part of delirium screening strategies, although for higher sensitivity other methods of assessment should be used.