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Biomedical subjects

D H Hickam

Publications and source records attributed to D H Hickam.

At least 37 records · Page 2Linked to original sources
PubMed1991

The validity of proxy-generated scores as measures of patient health status.

This study examines the validity of proxy assessments as substitutes for patient assessments of patient physical and psychosocial health status. Data were obtained from 275 patient-proxy pairs who were enrolled in a national study of Adult Day Health Care. Patients and proxies (informal caregivers such as spouses) were asked to complete the Sickness Impact Profile (SIP) based on the patients health status. Findings showed that patient-generated and proxy-generated physical scores were highly correlated, although proxies rated patients as slightly more impaired than the patient's rated themselves. The correlation between psychosocial scores was not high enough to consider proxy responses as valid substitutes for patient responses. We explored these differences in response by comparing regression equations predicting patient-generated and proxy-generated physical and psychosocial SIP dimension scores. Variance in the patient-generated psychosocial score was explained by physical function, psychological distress, cognitive status and patient age. Proxy-generated psychosocial scores were primarily explained by the caregiver's psychological distress and perceived burden. These findings point out the importance of considering the source of patient health status estimates when interpreting the results of research studies.

Activities of Daily Living↗
PubMed1991

Clinicians' predictions of nursing home placement for hospitalized patients.

Identifying patients who will need long-term care may improve the efficiency and effectiveness of acute hospital care. This prospective study evaluated clinicians' ability to identify patients requiring nursing home care. The study had two principal objectives. The first objective was to measure whether registered nurses, physicians, and social workers made similar estimates of the probability of nursing home placement early in an acute care hospitalization. The second objective was to identify the clinical characteristics of patients for whom the clinicians incorrectly predicted that they would return home. The study subjects were 342 patients older than age 55 who were admitted to the medicine, surgery, and neurology services of two university-affiliated Veterans Affairs hospitals. Fifteen percent were discharged to nursing homes. The nurses, physicians, and social workers had high agreement in their estimates of the probability of nursing home placement for each patient. However, each of the provider groups assigned low probability estimates to more than 20% of the patients discharged to nursing homes. Examination of the characteristics of patients assigned low probability estimates revealed that mental impairment and functional disability were higher in those patients who ultimately were discharged to nursing homes than in those patients who returned to their homes. These findings suggest that better assessment and interpretation of patient characteristics early in the hospital stay may improve discharge planning. Some clinicians appear to underestimate mental and functional impairment as risk factors for long-term care needs.

Aftercare↗
PubMed1991

Evaluation of SAPHIRE: an automated approach to indexing and retrieving medical literature.

An analysis of SAPHIRE, an experimental information retrieval system featuring automated indexing and natural language retrieval, was performed on MEDLINE references using data previously generated for a MEDLINE evaluation. Compared with searches performed by novice and expert physicians using MEDLINE, SAPHIRE achieved comparable recall and precision. While its combined recall and precision performance did not equal the level of librarians, SAPHIRE did achieve a significantly higher level of absolute recall. SAPHIRE has other potential advantages over existing MEDLINE systems. Its natural language interface does not require knowledge of MeSH, and it provides relevance ranking of retrieved references.

Abstracting and Indexing↗
PubMed1990

Using the patient's history to estimate the probability of coronary artery disease: a comparison of primary care and referral practices.

PURPOSE: According to probability theory, the interpretation of new information should depend on the prior probability of disease. We asked if this principle applies to interpreting the history in patients with chest pain. We compared the prevalence of coronary artery disease (CAD) in patients who had similar histories but who came from populations with different disease prevalence. PATIENTS AND METHODS: We studied two high-disease-prevalence populations (patients referred for coronary arteriography) and two low-disease-prevalence populations (patients from primary care practices). We used clinical characteristics of one arteriography population to develop a logistic rule for estimating the probability of coronary artery narrowing. The number of clinical findings determined the logistic score, which was proportional to the prevalence of CAD. RESULTS: The prevalence of CAD was much lower in the primary care population than in the arteriography population, even when patients with similar logistic scores, and thus similar clinical histories, were compared. CONCLUSION: A clinician must take account of the overall prevalence of disease in the clinical setting when using the patient's history to estimate the probability of disease. Failure to observe this caution may lead to errors in test selection and interpretation.

Adult↗
PubMed1989

The identification and management of drug-seeking behavior in a medical center.

We describe the development of a quality assurance program that monitors prescription medication misuse in a medical setting. The program focuses on patient activities that influence physician prescribing of abusable medications. Seven defining criteria have been developed to judge the presence of drug seeking by patients. When appropriate, a drug-seeking label is attached to the patient's chart and the hospital computer information system. The warning informs the physician and protects the patient from excessive medications.

Academic Medical Centers↗
PubMed1988

The doctor-patient relationship during medical internship: the evolution of dissatisfaction.

We prospectively examined perceptions of the doctor-patient relationship among interns in two different internal medicine training programs five times during the internship year. All 59 interns in the University of California, Irvine-Long Beach and the Oregon Health Sciences University Medical Programs participated in the study during the 1982-83 internship year. We serially administered a questionnaire that contained four major items: (1) a choice of one of six empirically developed role paradigms of the doctor-patient relationship; (2) a checklist of positive and negative aspects of internship; (3) a measure of level of satisfaction with the decision to become a physician; and (4) a rating list of mood descriptors. The six role paradigms portrayed a variety of positive and negative aspects of the doctor-patient relationship. At the beginning of the year, the interns were quite positive about the doctor-patient relationship and preferentially endorsed collegial models. As the year progressed, they endorsed significantly fewer positive and more negative models (P less than 0.001). Most respondents endorsed two models, one positive: "expert resource (doctor)--active cooperative participant (patient)" and one negative: "clerk, paperwork processor (doctor)--subscriber, seeker of eligibility (patient)." By the end of the year approximately half of the interns endorsed a positive and half a negative model. Interns selecting a negative model of the doctor-patient relationship identified more negative and fewer positive aspects of internship than those selecting a positive model. Specifically, they significantly more often (P less than 0.001) identified too much paper work and coping with difficult patients as negative aspects of internship.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1987

Evaluation of physical examination skills. Reliability of faculty observers and patient instructors.

Effective teaching of physical examination skills requires an evaluation system that can identify trainees who need further instruction. To study the evaluation of physical examination skills by faculty observers and patient instructors, the reliability of their observation of medical students performing a general physical examination was measured. Faculty observers did not reliably evaluate 32% of examination skills. Faculty agreement was lowest when observing components of the head, neck, and abdominal examinations. Patient instructors, with limited faculty training, reliably evaluated 83% of those skills that were reliably assessed by the faculty. These findings demonstrate limitations in the current methods of evaluating performance and point out the need to examine systems of trainee assessment.

Clinical Competence↗
PubMed1987

Responsibilities of primary physicians in organ donation.

As transplantation success rates have improved, the demand for donor organs has steadily increased. A shortage of donor organs has led to legislation requiring hospital personnel to provide families routinely with the opportunity to authorize organ donation. Primary physicians have an important role in identifying potential donors while continuing to assure that the survivors' needs are met. The major implications of organ donation for the primary physician are reviewed. Patients who die will more frequently be eligible as cornea, skin, or bone donors, but the criteria for both tissue and internal organ donation are reviewed. Ethical issues unique to organ donation and responses of survivors to donation requests are described. If appropriately offered, the opportunity to authorize an anatomic gift can be a source of comfort to survivors while the donation provides the benefits of transplantation to persons on organ waiting lists.

Ethics, Medical↗
PubMed1986

Nurses' and physicians' attitudes toward tube-feeding decisions in long-term care.

We studied attitudes of health professionals toward life-sustaining treatment. A patient management questionnaire sent to staff physicians and nurses in 183 Oregon nursing homes consisted of eight patient sketches which varied age, mental status, and enjoyment of life. Respondents were asked whether they would favor tube-feeding to correct malnutrition in each case. Nurses showed higher preferences for tube-feeding than did physicians (P = .05). For both professions, patient happiness was the strongest and most significant (P less than .0001) influence upon preferences for tube-feeding. Both professions also showed a significant (P less than .001) tendency to give younger patients higher preferences for tube-feeding. Physicians showed a significant (P less than .001) influence of patient mental status upon preferences, while patient mental status did not affect nurses' preferences. Identifiable clinical factors appear to influence attitudes of physicians and nurses toward tube-feeding decisions.

Aged↗
PubMed1986

The Veterans Administration Northwest Regional Health Services Research and Development Field Program: organization, activities, and early outcomes.

In 1982, the Veterans Administration established Health Services Research field programs in each of the six VA regions. Herein, we describe the historical origins, organization, responsibilities, activities, and early accomplishments of one of these programs--the Northwest Regional HSR&D field program. Special reference is made to this program's commitment to health services research relevant to geriatrics and gerontology, including the development of a system-wide agenda for research, information syntheses in geriatrics-relevant health services research topics, and the conduct of funded projects pertinent to care of the elderly. The importance of a medical center location for the field programs is discussed, and early indications of institutional impact are described.

Aged↗
PubMed1986

The internship--a prospective investigation of emotions and attitudes.

In a prospective survey for changes in emotions and attitudes of all medical interns of The Oregon Health Sciences University (N = 22) at six intervals during the 1982-1983 academic year, both positive and negative emotional changes were noted. Satisfaction with the decision to become a physician decreased during the period, a change that correlated directly with depression and fatigue and inversely with excitement and importance.

Attitude of Health Personnel↗
PubMed1985

Systematic bias in recording the history in patients with chest pain.

Because of its central importance in medical diagnosis, sources of bias in the patient history must be identified. We report here a study of interobserver agreement in chest pain histories. Histories were obtained by physicians, nurse practitioners, and self-administered questionnaires. We used a discriminant rule to classify the histories as being more or less typical of angina pectoris. A sub-group of the subjects underwent coronary arteriography after the histories were obtained. In subjects with positive coronary arteriograms, physicians consistently obtained histories typical of angina pectoris more often than a self-administered questionnaire. There was no significant systematic bias when comparing physician interviews to the questionnaire among subjects with negative arteriograms nor when comparing two physicians' interviews or a nurse practitioner interview to a questionnaire. When compared to physician interviews, nurse practitioner interviews produced histories less typical of angina pectoris. We conclude that there are systematic differences between the histories obtained by physicians, nurse practitioners, and self-administered questionnaires. Questionnaires can produce biased patient histories and should be carefully validated before being used in patient care activities or health care research.

Aged↗
PubMed1985

The treatment advice of a computer-based cancer chemotherapy protocol advisor.

ONCOCIN is a chemotherapy protocol advisor used experimentally in a university oncology clinic. The program combines formal protocol guidelines with judgments of oncologists who have experience adjusting therapy in complex clinical situations. We compared the chemotherapy administered by clinic physicians with the treatment that would have been recommended by ONCOCIN in 415 visits for 39 patients with lymphoma seen before the program's introduction. In 189 visits the program agreed with the therapy actually administered. In a blinded evaluation, four experts on lymphoma failed to find a significant difference between the treatments selected by physicians and those proposed by ONCOCIN. Further analyses showed that ONCOCIN tended to attenuate drug doses or delay treatment more than the experts recommended, whereas the physicians were less likely to attenuate doses to the extent the experts suggested. Our results show that ONCOCIN provides advice on lymphoma treatment similar to the treatment provided in a university oncology clinic.

Adult↗