The natural history of delirium in older hospitalized patients: a syndrome of heterogeneity

OBJECTIVES

To determine the presentation, course and duration of delirium in hospitalized older people.

DESIGN

Observational cohort study.

SETTING

Inpatient surgical and medical wards at a university hospital.

PARTICIPANTS

432 people over the age of 65.

MEASUREMENTS

All participants were screened daily for confusion and, in those who were confused, delirium was ascertained using the Diagnostic and Statistical Manual of Mental Disorders (DSM) III-R criteria. Those who were found to be delirious were followed daily while in hospital for evidence of delirium. The Delirium Rating Scale (DRS) was used to describe the clinical characteristics of delirium.

RESULTS

About 15% of subjects had delirium. Sixty-nine percent of delirious subjects had delirium on a single day. The DRS total was higher on the first day of delirium for those with delirium on multiple days than those with delirium on a single day (P = 0.03). Among those with delirium on multiple days, there were no patterns of change over time in specific DRS items.

CONCLUSIONS

Delirium in hospitalized older people is common and has a varied presentation and time course. Clinicians and researchers need to consider this great heterogeneity when caring for patients and when studying delirium.

Functional limitation pathways and transitions in community-dwelling older persons

The focus of this article is to determine the probability of making transitions through various ADL limitation levels, controlling for gender, age, and baseline ADL level, and using death as a competing outcome. We use the four waves of the Longitudinal Study of Aging and categorical data techniques to model the probability of these transitions. We find much heterogeneity among the transitions, with significant age and functional limitation effects. We also find that death and functional limitations are not necessarily highly linked.

Caring for the terminally Ill

More than 50% of dying patients do not receive adequate symptomatic relief. Fear of hastening death is the primary reason for physicians' reluctance to prescribe high-dose pain medication. Yet the ethical principle of "double effect" clearly states that palliative care which results in respiratory depression is justified-as long as the goal of management is relief of suffering, rather than death.

The patient-physician covenant: an affirmation of Asklepios

Medicine is, at its center, a moral enterprise grounded in a covenant of trust. This covenant obliges physicians to be competent and to use their competence in the patient's best interests. Physicians, therefore, are both intellectually and morally obliged to act as advocates for the sick wherever their welfare is threatened and for their health at all times. Today, this covenant of trust is significantly threatened. From within, there is growing legitimation of the physician's materialistic self-interest; from without, for-profit forces press the physician into the role of commercial agent to enhance the profitability of health care organizations. Such distortions of the physician's responsibility degrade the physician-patient relationship that is the central element and structure of clinical care. To capitulate to these alterations of the trust relationship is to significantly alter the physician's role as healer, carer helper, and advocate for the sick and for the health of all. By its traditions and very nature, medicine is a special kind of human activity--one that cannot be pursued effectively without the virtues of humility, honesty, intellectual integrity, compassion, and effacement of excessive self-interest. These traits mark physicians as members of a moral community dedicated to something other than its own self-interest. Our first obligation must be to serve the good of those persons who seek our help and trust us to provide it. Physicians, as physicians, are not, and must never be, commercial entrepreneurs, gateclosers, or agents of fiscal policy that runs counter to our trust. Any defection from primacy of the patient's well-being places the patient at risk by treatment that may compromise quality of or access to medical care. We believe the medical profession must reaffirm the primacy of its obligation to the patient through national, state, and local professional societies; our academic, research, and hospital organizations; and especially through personal behavior. As advocates for the promotion of health and support of the sick, we are called upon to discuss, defend, and promulgate medical care by every ethical means available. Only by caring and advocating for the patient can the integrity of our profession be affirmed. Thus we honor our covenant of trust with patients.

Ethical and legal issues in nursing home care

Physicians who provide care for nursing home residents are regularly challenged by ethical and legal issues. Because nursing home care is complicated by numerous regulations and because nursing home residents have complex medical and social problems, some issues are unique to the long-term care setting and others present in unfamiliar ways. Some issues frequently encountered in this context are discussed: advance directives, competence and decision-making capacity, decisions about life-sustaining treatment, resident abuse, restraints, psychotropic medications, risk management, participation in research, and ethics committees. With knowledge of the legal and ethical framework and understanding of some of the common, complicated issues that arise, physicians should be better equipped to provide optimal care for nursing home residents.

Do actions reported by physicians in training conflict with consensus guidelines on ethics?

OBJECTIVE

To assess the extent to which actions reported by internal medicine trainees conflict with published guidelines on ethics.

METHODS

A confidential survey was sent to a random sample (N = 1000) of associate members of the American College of Physicians (ACP). Questions were asked about ethical decision making in areas addressed by the guidelines in the ACP Ethics Manual. Quoted manual guidelines were provided, followed by 55 yes or no questions, such that a yes answer represented an action that conflicted with a guideline. There were two follow-up mailings to nonresponders.

RESULTS

Forty percent (n = 397) completed the questionnaire; 17% indicated they were aware of the guidelines on ethics. On average, associates responded yes to 16% of questions where a yes response indicated they have acted outside guidelines on ethics one or more times. The mean number of responses (n = 55) that conflicted with a guideline was 7.6 per person (SD, 4.7 responses; range, 0 to 33 responses). Ninety-eight percent of respondents reported actions falling outside a guideline one or more times and 80% did so four or more times. The most frequently reported reason (965/3219 [30%]) from a list of four choices for acting outside a guideline was "I was aware of the guideline, but this did not represent an ethical dilemma to me."

CONCLUSIONS

Few responding ACP associates indicated awareness of the ACP guidelines on ethics. Physicians in training nevertheless reported acting according to the presented guidelines most of the time, although nearly all respondents acted outside a guideline at least once, and some did so many times. Reported behaviors were sometimes inconsistent with consensus ethical standards that apply to internists. Physicians in training need to know more about ethical standards that apply to their own practice and should be aware when their actions deviate from ethical norms. Before acting outside guidelines on ethics, trainees should discuss their conflicts with others, such as attending physicians, clinical ethicists, or hospital ethics committees.

Narratives on pain and comfort: Dr. M's story

Dr. M is a fifty-nine-year-old internist with a successful practice in a major Eastern United States city. He has lived in this city his whole life and is a highly esteemed citizen. Because of his broader social concerns and energetic support of activities to improve access to health care and quality of care for the underserved, Dr. M became involved in a number of local and regional medical organizations and quickly rose to prominence as as a director of a board of a major national organization. In this position, he was an effective, articulate spokesperson, highly respected for his integrity and thoughtfulness.

Before one of the meetings of thithis s board, Dr. M personally contacted the organization's other directors, including me, to warn us that we might be hearing some scandalous news about him. He wanted us first to hear it from him personally. This was the scandalous news.

Dr. M had assumed the care of a patient of a recently retired colleague. The patient was an older woman with multiple musculoskeletal complaints related to lumbar stenosis and advanced degenerative arthritis of the spine, which left her in immense pain.

Toward a person-centered medicine: religious studies in the medical curriculum

The role of religious studies in the medical curriculum derives from three important aspects of people's engagement with religious belief and practice. These are (1) religion as a source of meaning, (2) religion as a source and framework for values, and (3) religion as an outstanding context for the appreciation of human diversity. By offering separate religious studies courses, or by introducing religious themes and content into students' other learning experiences, the curriculum can foster the student's respect for the individuality of the patient in his or her cultural context; heighten the student's awareness of the patient's--and his or her own--beliefs, values, and faith as resources for dealing with illness, suffering, and death; help students address any of the myriad value-laden aspects of everyday living that are part of the context of many doctor-patient encounters; and strengthen the student's commitment to a person-centered medicine that emphasizes the care of the suffering person rather than the biology of disease. The authors discuss the strengths and limitations of several settings for the teaching of religious issues in medicine, and suggest specific pedagogical approaches, readings, and resources.

Medical conditions differentially affect the development of IADL disability: implications for medical care and research

Using The Longitudinal Study of Aging, we determined the independent effects of nine self-reported medical conditions on the likelihood of developing specific instrumental activities of daily living (IADLs) disabilities at three points in time. We controlled for demographic factors and self-reported health status. The various medical conditions differentially affect each specific IADL disability, and each IADL disability has its own set of predictors which, in general, do not vary over time. The differential effects of thse predictors need to be taken into consideration by researchers, clinicians, and policymakers when studying disability and when implementing and evaluating programs to reduce disability.

Nonabandonment: a central obligation for physicians

Nonabandonment is one of a physician's central ethical obligations; it reflects a longitudinal commitment both to care about patients and to jointly seek solutions to problems with patients throughout their illnesses. The depth of this commitment may vary depending on the physician's and the patient's values and personalities, their shared experiences, and the patient's clinical circumstances. Traditional principled ethical analyses must balance the personal histories, values, motivations, and intentions of the participants with more general considerations. Such analyses often focus on a particular act, isolated in time, and yet the consequences of one decision immediately lead to a new set of choices. Nonabandonment places the physician's open-ended, long-term, caring commitment to joint problem solving at the core of medical ethics and clinical medicine. There is a world of difference between facing an uncertain future alone and facing it with a committed, caring, knowledgeable partner who will not shy away from difficult decisions when the path is unclear.

Detecting delirium among hospitalized older patients

BACKGROUND

Delirium occurs commonly among older hospitalized patients and is frequently not recognized. In an effort to identify tools useful to clinicians in the diagnosis of delirium, test characteristics of four screening instruments were compared.

METHODS

Patients 65 years of age or older who were admitted to one of four medical and surgical wards of a university teaching hospital were followed up prospectively. Potential subjects were excluded if unavailable for interviews or discharged within 48 hours of admission, or if judged too impaired to participate in the daily interviews. Research assistants administered four instruments used to detect delirium: Digit Span Test, Vigilance 'A' Test, Clinical Assessment of Confusion, and Confusion Assessment Method. Abnormal scores on these tests or suspicion of acute confusion prompted a referral to the clinician-investigators who then assessed the patient daily for delirium based on the Diagnostic and Statistical Manual of Mental Disorders, Revised Third Edition criteria.

RESULTS

Delirium occurred in 64 (14.8%) of 432 subjects. The positive likelihood ratios for all of the instruments were significantly more than 1. The instruments remained useful when applied to selected subgroups: subjects in whom acute mental status changes were documented, subjects on surgical services, and subjects with impaired cognitive status on admission. Combinations of any two instruments did not perform substantially better than the instrument with the best test characteristics: the Clinical Assessment of Confusion. All instruments were more useful at confirming delirium than in excluding it.

CONCLUSION

The four instruments studied, which are suitable for use at the bedside, can aid the clinician in identifying patients likely to be suffering from delirium.

Delirium in hospitalized older persons: outcomes and predictors

OBJECTIVE

The purpose of this study was fourfold; to determine the rate of delirium among hospitalized older persons, to contrast the clinical outcomes of patients with and without delirium, to identify clinical predictors of delirium, and to validate the predictive model in an independent sample of patients.

DESIGN

Two prospective cohort studies

SETTING

Medical and surgical wards of 2 university teaching hospitals.

PATIENTS

In the derivation cohort, 432 patients were enrolled from the University of Chicago Hospitals. Patients 65 years of age or older admitted to 1 of 4 wards were eligible. Subjects were excluded if they were discharged within 48 hours of admission, unavailable to the research assistants during the first 2 days of hospitalization, or judged too impaired to participate in the daily interviews. In the test cohort, 323 patients 70 years of age or older admitted to Yale-New Haven Hospital were studied.

MEASUREMENTS

Subjects were screened for delirium daily and referred to experienced clinician investigators if acute mental status changes were observed. The clinician investigators assessed the patient for delirium based on DSM-III-R criteria. Duration of hospitalization was adjusted for diagnosis-related groups (DRG) and mortality rates were determined at discharge and 90 days after discharge. Sociodemographic characteristics, cognitive and functional status, comorbidity, depression, and alcoholism were examined as predictors of delirium.

MAIN RESULTS

The rate of delirium in the derivation cohort was 15%; subjects with delirium had longer hospital stays and an increased risk of in-hospital death. Cognitive impairment, burden of comorbidity, depression, and alcoholism were found to be independent predictors of delirium. The ability of the model to stratify patients as low, moderate, or high risk for developing delirium was validated in the test cohort in which the rate of delirium was 26%.

CONCLUSIONS

This study confirms the high rate of delirium among hospitalized older persons and the associated adverse outcomes of prolonged hospital stays and increased risk of death. Patients can be stratified according to their risk for developing delirium using relatively few clinical characteristics which should be assessed, on all hospitalized older persons.

Guidelines, practice policies, and parameters: the case for geriatrics

OBJECTIVE

As the population ages, the care of older persons becomes more important. At the same time, practice guidelines that provide recommendations for appropriate care are being published in greater numbers. The purpose of this work is to determine the proportion of guidelines that contain specific information about older persons.

DESIGN

Through a random sample of published guidelines listed in the AMA Directory of Practice Parameters, 1992 Edition, we determined the proportion of guidelines that contain specific age-related information. We also determined if, over time, there was a difference in the proportion of practice guidelines containing information about older persons.

RESULTS

45.9% (95% CI, range 33.4-58.4) of guidelines that could conceivably pertain to older persons contain no age information; 24.6% (95% CI, range 13.8-35.4) of guidelines contain information only about persons less than 65 years of age; 29.5% (95% CI, range 18.1-41.0) of guidelines contain specific information about older persons. Moreover, there were no secular trends in the proportion of guidelines pertaining to older persons.

CONCLUSIONS

Only a minority of practice guidelines contain information about older persons. Possible causes and solutions to this shortfall are discussed.